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Chaptewr 5 Special Occupancies | 513.2 | In addition to the requirements of this article, aircraft hangars shall comply with Table 513.2, as applicable, except as modified by this article. Table 513.2 Other Articles Requirement Division Classified Locations Zone Classified Locations Area classification 500.5, 500.6 505.5, 505.6, 505.7 Equipment Part III of 501, 505.8, 505.9, 500.7, 500.8, 501.5 505.20, 505.22 Wiring Part II of 501 505.15, 505.16, 505.17, 505.18, 505.19, 505.26, 505.30 [513.2](https://2023.antflix.net#513.2) | https://2023.antflix.net#513.2 |
Chaptewr 5 Special Occupancies | 513.3 | Where the term "Class I" is used with respect to Zone classifications within this article of the Code, it shall apply to Zone 0, Zone 1, and Zone 2 designations. Informational Note: The term "Class I" was originally included as a prefix to Zone 0, Zone 1, and Zone 2 locations and references as an identifier for flammable gases, vapors, or liquids to differentiate from Class II and Class III locations. Zone 0, Zone 1, and Zone 2 only apply to flammable gases, vapors, or liquids so the "Class I" prefix is redundant and has been deleted, except for text that is extracted from other documents or to remain consistent throughout this article. [513.3](https://2023.antflix.net#513.3) | https://2023.antflix.net#513.3 |
Chaptewr 5 Special Occupancies | 513.3(A) | Any pit or depression below the level of the hangar floor shall be classified as a Class I, Division 1 or Zone 1 location that shall extend up to said floor level. [513.3(A)](https://2023.antflix.net#513.3(A)) | https://2023.antflix.net#513.3(A) |
Chaptewr 5 Special Occupancies | 513.3(B) | The entire area of the hangar, including any adjacent and communicating areas not suitably separated from the hangar, shall be classified as a Class I, Division 2 or Zone 2 location up to a level 450 mm (18 in.) above the floor. [513.3(B)](https://2023.antflix.net#513.3(B)) | https://2023.antflix.net#513.3(B) |
Chaptewr 5 Special Occupancies | 513.3(C)(1) | The area within 1.5 m (5 ft) horizontally from aircraft power plants or aircraft fuel tanks shall be classified as a Class I, Division 2 or Zone 2 location that shall extend upward from the floor to a level 1.5 m (5 ft) above the upper surface of wings and engine enclosures. [513.3(C)(1)](https://2023.antflix.net#513.3(C)(1)) | https://2023.antflix.net#513.3(C)(1) |
Chaptewr 5 Special Occupancies | 513.3(C)(2) | The area within 3 m (10 ft) horizontally from aircraft surfaces from the floor to 3 m (10 ft) above the aircraft shall be classified as Class I, Division 1 or Zone 1. The area horizontally from aircraft surfaces between 3.0 m (10 ft) and 9.0 m (30 ft) from the floor to 9.0 m (30 ft) above the aircraft surface shall be classified as Class I, Division 2 or Zone 2. Informational Note: See NFPA 33, Standard for Spray Application Using Flammable or Combustible Materials, for information on ventilation and grounding for static protection in spray painting areas. [513.3(C)(2)](https://2023.antflix.net#513.3(C)(2)) | https://2023.antflix.net#513.3(C)(2) |
Chaptewr 5 Special Occupancies | 513.3(D) | Adjacent areas in which flammable liquids or vapors are not likely to be released, such as stock rooms, electrical control rooms, and other similar locations, shall be unclassified where mechanically ventilated at a rate of four or more air changes per hour, designed with positive air pressure, or effectively separated from the hangar itself by walls or partitions. [513.3(D)](https://2023.antflix.net#513.3(D)) | https://2023.antflix.net#513.3(D) |
Chaptewr 5 Special Occupancies | 513.4(A) | All wiring and equipment that is installed or operated within any of the hazardous (classified) locations defined in 513.3 shall comply with the applicable requirements of the hazardous (classified) locations. Attachment plugs and receptacles shall be identified for the location or shall be designed so they cannot be energized while the connections are being made or broken. [513.4(A)](https://2023.antflix.net#513.4(A)) | https://2023.antflix.net#513.4(A) |
Chaptewr 5 Special Occupancies | 513.4(B) | Electrical wiring, outlets, and equipment (including lamps) on or attached to stanchions, rostrums, or docks that are located in a hazardous (classified) location as defined in 513.3(C) shall comply with the applicable requirements of Parts II and III of Article 501 or 505.17 through 505.30. as applicable. [513.4(B)](https://2023.antflix.net#513.4(B)) | https://2023.antflix.net#513.4(B) |
Chaptewr 5 Special Occupancies | 513.7(A) | All fixed wiring in a hangar but not installed in a Class I location as classified in 513.3 shall be installed in metal raceways or shall be Type MI, TC, or MC cable. Exception: Wiring in unclassified locations, as described in, 513.3(D), shall be permitted to be any suitable type wiring method recognized in Chapter 3. [513.7(A)](https://2023.antflix.net#513.7(A)) | https://2023.antflix.net#513.7(A) |
Chaptewr 5 Special Occupancies | 513.7(B) | For pendants, flexible cord suitable for the type of service and identified for hard usage or extra-hard usage shall be used. Each such cord shall include a separate equipment grounding conductor. [513.7(B)](https://2023.antflix.net#513.7(B)) | https://2023.antflix.net#513.7(B) |
Chaptewr 5 Special Occupancies | 513.7(C) | In locations above those described in 513.3, equipment that is less than 3.0 m (10 ft) above wings and engine enclosures of aircraft and that may produce arcs, sparks, or particles of hot metal, such as lamps and lampholders for fixed lighting, cutouts, switches, receptacles, charging panels, generators, motors, or other equipment having make-and-break or sliding contacts, shall be of the totally enclosed type or constructed so as to prevent the escape of sparks or hot metal particles. Exception: Equipment in areas described in 513.3(D) shall be permitted to be of the general-purpose type. [513.7(C)](https://2023.antflix.net#513.7(C)) | https://2023.antflix.net#513.7(C) |
Chaptewr 5 Special Occupancies | 513.7(D) | Lampholders of metal-shell, fiber-lined types shall not be used for fixed incandescent lighting. [513.7(D)](https://2023.antflix.net#513.7(D)) | https://2023.antflix.net#513.7(D) |
Chaptewr 5 Special Occupancies | 513.7(E) | Where stanchions, rostrums, or docks are not located or likely to be located in a Class I location, as defined in 513.3(C), wiring and equipment shall comply with 513.7, except that such wiring and equipment not more than 457 mm (18 in.) above the floor in any position shall comply with 513.4(B). Receptacles and attachment plugs shall be of a locking type that will not readily disconnect. [513.7(E)](https://2023.antflix.net#513.7(E)) | https://2023.antflix.net#513.7(E) |
Chaptewr 5 Special Occupancies | 513.7(F) | Mobile stanchions with electrical equipment complying with 513.7(E) shall carry at least one permanently affixed warning sign with the following words or equivalent:
WARNINGKEEP 5 FT CLEAR OF AIRCRAFT ENGINES AND FUELTANK AREAS
or
WARNINGKEEP 1.5 METERS CLEAR OF AIRCRAFT ENGINES AND FUELTANK AREAS [513.7(F)](https://2023.antflix.net#513.7(F)) | https://2023.antflix.net#513.7(F) |
Chaptewr 5 Special Occupancies | 513.8(A) | All wiring installed in or under the hangar floor shall comply with the requirements for Class I, Division 1 locations. Where such wiring is located in vaults, pits, or ducts, adequate drainage shall be provided. [513.8(A)](https://2023.antflix.net#513.8(A)) | https://2023.antflix.net#513.8(A) |
Chaptewr 5 Special Occupancies | 513.8(B) | Uninterrupted raceways that are embedded in a hangar floor or buried beneath the hangar floor shall be considered to be within the Class I location above the floor, regardless of the point at which the raceway descends below or rises above the floor. [513.8(B)](https://2023.antflix.net#513.8(B)) | https://2023.antflix.net#513.8(B) |
Chaptewr 5 Special Occupancies | 513.9 | Seals shall be provided in accordance with 501.15 or 505.16, as applicable. Sealing requirements specified shall apply to horizontal as well as to vertical boundaries of the defined Class I locations. [513.9](https://2023.antflix.net#513.9) | https://2023.antflix.net#513.9 |
Chaptewr 5 Special Occupancies | 513.10(A)(1) | Aircraft electrical systems shall be de-energized when the aircraft is stored in a hangar and, whenever possible, while the aircraft is undergoing maintenance. [513.10(A)(1)](https://2023.antflix.net#513.10(A)(1)) | https://2023.antflix.net#513.10(A)(1) |
Chaptewr 5 Special Occupancies | 513.10(A)(2) | Aircraft batteries shall not be charged where installed in an aircraft located inside or partially inside a hangar. [513.10(A)(2)](https://2023.antflix.net#513.10(A)(2)) | https://2023.antflix.net#513.10(A)(2) |
Chaptewr 5 Special Occupancies | 513.10(B) | Battery chargers and their control equipment shall not be located or operated within any of the Class I locations defined in 513.3 and shall be located in a separate building or in an area defined in 513.3(D). Mobile chargers shall carry at least one permanently affixed warning sign with the following words or equivalent:
WARNINGKEEP 5 FT CLEAR OF AIRCRAFT ENGINES AND FUELTANK AREAS
or
WARNINGKEEP 1.5 METERS CLEAR OF AIRCRAFT ENGINES AND FUELTANK AREAS
Tables, racks, trays, and wiring shall not be located within a Class I location and shall comply with the requirements of 480.9 and 480.10. [513.10(B)](https://2023.antflix.net#513.10(B)) | https://2023.antflix.net#513.10(B) |
Chaptewr 5 Special Occupancies | 513.10(C)(1) | Aircraft energizers shall be designed and mounted such that all electrical equipment and fixed wiring will be at least 450 mm (18 in.) above floor level and shall not be operated in a Class I location as defined in 513.3(C). [513.10(C)(1)](https://2023.antflix.net#513.10(C)(1)) | https://2023.antflix.net#513.10(C)(1) |
Chaptewr 5 Special Occupancies | 513.10(C)(2) | Mobile energizers shall carry at least one permanently affixed warning sign with the following words or equivalent: WARNINGKEEP 5 FT CLEAR OF AIRCRAFT ENGINES AND FUELTANK AREAS or WARNINGKEEP 1.5 METERS CLEAR OF AIRCRAFT ENGINES AND FUELTANK AREAS [513.10(C)(2)](https://2023.antflix.net#513.10(C)(2)) | https://2023.antflix.net#513.10(C)(2) |
Chaptewr 5 Special Occupancies | 513.10(C)(3) | Flexible cords for aircraft energizers and ground support equipment shall be identified for the type of service and extra-hard usage and shall include an equipment grounding conductor. [513.10(C)(3)](https://2023.antflix.net#513.10(C)(3)) | https://2023.antflix.net#513.10(C)(3) |
Chaptewr 5 Special Occupancies | 513.10(D)(1) | Mobile servicing equipment (such as vacuum cleaners, air compressors, air movers) having electrical wiring and equipment not suitable for Class I, Division 2 or Zone 2 locations shall be so designed and mounted that all such fixed wiring and equipment will be at least 450 mm (18 in.) above the floor. Such mobile equipment shall not be operated within the Class I location defined in 513.3(C) and shall carry at least one permanently affixed warning sign with the following words or equivalent: WARNINGKEEP 5 FT CLEAR OF AIRCRAFT ENGINES AND FUELTANK AREAS or WARNINGKEEP 1.5 METERS CLEAR OF AIRCRAFT ENGINESAND FUEL TANK AREAS [513.10(D)(1)](https://2023.antflix.net#513.10(D)(1)) | https://2023.antflix.net#513.10(D)(1) |
Chaptewr 5 Special Occupancies | 513.10(D)(2) | Flexible cords for mobile equipment shall be suitable for the type of service and identified for extra-hard usage and shall include an equipment grounding conductor. Attachment plugs and receptacles shall be identified for the location in which they are installed and shall provide for connection of the equipment grounding conductor. [513.10(D)(2)](https://2023.antflix.net#513.10(D)(2)) | https://2023.antflix.net#513.10(D)(2) |
Chaptewr 5 Special Occupancies | 513.10(D)(3) | Equipment that is not identified as suitable for Class I, Division 2 locations shall not be operated in locations where maintenance operations likely to release flammable liquids or vapors are in progress. [513.10(D)(3)](https://2023.antflix.net#513.10(D)(3)) | https://2023.antflix.net#513.10(D)(3) |
Chaptewr 5 Special Occupancies | 513.10(E)(1) | Portable lighting equipment that is used within a hangar shall be identified for the location in which they are used. For portable luminaires, flexible cord suitable for the type of service and identified for extra-hard usage shall be used. Each such cord shall include a separate equipment grounding conductor. [513.10(E)(1)](https://2023.antflix.net#513.10(E)(1)) | https://2023.antflix.net#513.10(E)(1) |
Chaptewr 5 Special Occupancies | 513.10(E)(2) | Portable utilization equipment that is or may be used within a hangar shall be of a type suitable for use in Class I, Division 2 or Zone 2 locations. For portable utilization equipment, flexible cord suitable for the type of service and approved for extra-hard usage shall be used. Each such cord shall include a separate equipment grounding conductor. [513.10(E)(2)](https://2023.antflix.net#513.10(E)(2)) | https://2023.antflix.net#513.10(E)(2) |
Chaptewr 5 Special Occupancies | 513.12 | Ground-fault circuit-interrupter protection for personnel shall be provided as required in 210.8(B). [513.12](https://2023.antflix.net#513.12) | https://2023.antflix.net#513.12 |
Chaptewr 5 Special Occupancies | 513.16(A) | All metal raceways, the metal armor or metallic sheath on cables, and all non—current-carrying metal parts of fixed or portable electrical equipment, regardless of voltage, shall be grounded. Grounding in Class I locations shall comply with 501.30 for Class I, Division 1 and 2 locations and 505.30 for Zone 0, 1, and 2 locations. [513.16(A)](https://2023.antflix.net#513.16(A)) | https://2023.antflix.net#513.16(A) |
Chaptewr 5 Special Occupancies | 513.16(B)(1) | Where a circuit supplies portables or pendants and includes a grounded conductor, receptacles, attachment plugs, connectors, and similar devices shall be of the grounding type, and the grounded conductor of the flexible cord shall be connected to the screw shell of any lampholder or to the grounded terminal of any utilization equipment supplied. [513.16(B)(1)](https://2023.antflix.net#513.16(B)(1)) | https://2023.antflix.net#513.16(B)(1) |
Chaptewr 5 Special Occupancies | 513.16(B)(2) | Approved means shall be provided for maintaining continuity of the equipment grounding conductor between the fixed wiring system and the non—current-carrying metal portions of pendant luminaires, portable luminaires, and portable utilization equipment. [513.16(B)(2)](https://2023.antflix.net#513.16(B)(2)) | https://2023.antflix.net#513.16(B)(2) |
Chaptewr 5 Special Occupancies | 514.1 | This article shall apply to motor fuel dispensing facilities, marine/motor fuel dispensing facilities, motor fuel dispensing facilities located inside buildings, and fleet vehicle motor fuel dispensing facilities. Informational Note: See NFPA 30A-2021, Code for Motor Fuel Dispensing Facilities and Repair Garages, for information regarding safeguards for motor fuel dispensing facilities and for extracted text that is followed by a reference in brackets. Only editorial changes were made to the extracted text to make it consistent with this Code. [514.1](https://2023.antflix.net#514.1) | https://2023.antflix.net#514.1 |
Chaptewr 5 Special Occupancies | 514.2 | In addition to the requirements of this article, motor fuel dispensing facilities shall comply with Table 514.2, as applicable, except as modified by this article. Table 514.2 Other Articles Requirement Division ClassifiedLocations Zone Classified Locations Area classification 500.5, 500.6 505.5, 505.6, 505.7 Equipment Part III of 501, 500.7, 505.8, 505.9, 505.20, 500.8, 501.5 505.22 Wiring Part II of 501 505.15, 505.16, 505.17, 505.18, 505.19, 505.26, 505.30 [514.2](https://2023.antflix.net#514.2) | https://2023.antflix.net#514.2 |
Chaptewr 5 Special Occupancies | 514.3 | Where the term "Class I" is used with respect to Zone classifications within this article of the Code, it shall apply to Zone 0, Zone 1, and Zone 2 designations. Informational Note: The term "Class I" was originally included as a prefix to Zone 0, Zone 1, and Zone 2 locations and references as an identifier for flammable gases, vapors, or liquids to differentiate from Class II and Class III locations. Zone 0, Zone 1, and Zone 2 only apply to flammable gases, vapors, or liquids so the "Class I" prefix is redundant and has been deleted, except for text that is extracted from other documents or to remain consistent throughout this article. [See Figure 514.3.] [514.3](https://2023.antflix.net#514.3) | https://2023.antflix.net#514.3 |
Chaptewr 5 Special Occupancies | 514.3(A) | Where the authority having jurisdiction can satisfactorily determine that flammable liquids having a flash point below 38°C (100°F), such as gasoline, will not be handled, such location shall not be required to be classified. [514.3(A)](https://2023.antflix.net#514.3(A)) | https://2023.antflix.net#514.3(A) |
Chaptewr 5 Special Occupancies | 514.3(B) | [See Figure 514.3(B).] [514.3(B)](https://2023.antflix.net#514.3(B)) | https://2023.antflix.net#514.3(B) |
Chaptewr 5 Special Occupancies | 514.3(B)(1) | Table 514.3(B)(1) shall be applied where Class I liquids are stored, handled, or dispensed and shall be used to delineate and classify motor fuel dispensing facilities and commercial garages as defined in Article 100. Table 515.3 shall be used for the purpose of delineating and classifying aboveground tanks. A Class I location shall not extend beyond an unpierced wall, roof, or other solid partition. [30A:8.1, 8.2, 8.3] [514.3(B)(1)](https://2023.antflix.net#514.3(B)(1)) | https://2023.antflix.net#514.3(B)(1) |
Chaptewr 5 Special Occupancies | 514.3(B)(2) | Table 514.3(B)(2) shall be used to delineate and classify areas where CNG, LNG, compressed or liquefied hydrogen, LP-Gas, or combinations of these, are dispensed as motor vehicle fuels along with Class I or Class II liquids that are also dispensed as motor vehicle fuels. [30A:12.1] Where CNG or LNG dispensers are installed beneath a canopy or enclosure, either the canopy or enclosure shall be designed to prevent accumulation or entrapment of ignitible vapors or all electrical equipment installed beneath the canopy or enclosure shall be suitable for Class I, Division 2 hazardous (classified) locations. [30A:12.4] Dispensing devices for LP-Gas shall be located as follows:At least 3 m (10 ft) from any dispensing device for Class I liquidsAt least 1.5 m (5 ft) from any dispensing device for Class I liquids where the following conditions exist:The LP-Gas deliver nozzle and filler valve release no more than 4 cm3 (0.1 oz) of liquid upon disconnection.The fixed maximum liquid level gauge remains closed during the entire refueling process.[30A:12.5.2]Informational Note No. 1: See NFPA 58, Liquefied Petroleum Gas Code, for requirements on dispensing devices for LP-Gas.Informational Note No. 2: See NFPA 58, Liquefied Petroleum Gas Code, and NFPA 59, Utility LP-Gas Plant Code, for information on classified areas pertaining to LP-Gas systems other than residential or commercial.Informational Note No. 3: See 514.3(C) for motor fuel dispensing stations in marinas and boatyards. [514.3(B)(2)](https://2023.antflix.net#514.3(B)(2)) | https://2023.antflix.net#514.3(B)(2) |
Chaptewr 5 Special Occupancies | 514.3(B)(3) | Aboveground tanks storing CNG or LNG shall be separated from any adjacent property line that is or can be built upon, any public way, and the nearest important building on the same property. [30A:12.3.1]Informational Note: See NFPA 52, Vehicular Natural Gas Fuel Systems Code, Section 8.4, for the relevant distances for CNG and LNG.Aboveground tanks storing hydrogen shall be separated from any adjacent property line that is or can be built upon, any public way, and the nearest important building on the same property. [30A:12.3.2]Informational Note: See NFPA 2, Hydrogen Technologies Code, for the relevant distances for hydrogen.Aboveground tanks storing LP-Gas shall be separated from any adjacent property line that is or can be built upon, any public way, and the nearest important building on the same property. [30A:12.3.3]Informational Note: See NFPA 58, Liquefied Petroleum Gas Code, Section 6.3, for the relevant distances for LP-Gas.Aboveground tanks storing CNG, LNG, or LP-Gas shall be separated from each other by at least 6 m (20 ft) and from dispensing devices that dispense liquid or gaseous motor vehicle fuels by at least 6 m (20 ft). [30A:12.3.3]Exception No. 1: The required separation shall not apply to tanks or dispensers storing or handling fuels of the same chemical composition.Exception No. 2: The required separation shall not apply when both the gaseous fuel storage and dispensing equipment are at least 15 m (50 ft) from any other aboveground motor fuel storage or dispensing equipment.Informational Note: See NFPA 52, Vehicular Natural Gas Fuel Systems Code, or NFPA 58, Liquefied Petroleum Gas Code, for additional information.Dispenser Installations Beneath Canopies. Where CNG or LNG dispensers are installed beneath a canopy or enclosure, either the canopy or enclosure shall be designed to prevent accumulation or entrapment of ignitible vapors or all electrical equipment installed beneath the canopy or enclosure shall be suitable for Class I, Division 2 hazardous (classified) locations. [30A:12.4]Specific Requirements for LP-Gas Dispensing Devices. [30A:12.5] Dispensing devices for LP-Gas shall be located as follows:At least 3 m (10 ft) from any dispensing device for Class I liquidsAt least 1.5 m (5 ft) from any dispensing device for Class I liquids where the following conditions exist:The LP-Gas deliver nozzle and filler valve release no more than 4 cm3 (0.1 oz) of liquid upon disconnection.The fixed maximum liquid level gauge remains closed during the entire refueling process. [30A:12.5.2]Table 514.3(B)(2) shall be used to delineate and classify areas for the purpose of installation of electrical wiring and electrical utilization equipment. [514.3(B)(3)](https://2023.antflix.net#514.3(B)(3)) | https://2023.antflix.net#514.3(B)(3) |
Chaptewr 5 Special Occupancies | 514.3(C) | Informational Note: See NFPA 303, Fire Protection Standard for Marinas and Boatyards, and NFPA 30A, Code for Motor Fuel Dispensing Facilities and Repair Garages, for additional information. [514.3(C)](https://2023.antflix.net#514.3(C)) | https://2023.antflix.net#514.3(C) |
Chaptewr 5 Special Occupancies | 514.3(C)(1) | Electrical wiring and equipment located at or serving motor fuel dispensing locations shall be installed on the side of the wharf, pier, or dock opposite from the liquid piping system. [514.3(C)(1)](https://2023.antflix.net#514.3(C)(1)) | https://2023.antflix.net#514.3(C)(1) |
Chaptewr 5 Special Occupancies | 514.3(C)(2) | The criteria provided in 514.3(C)(2)(a) and (C)(2)(b) shall be used for the purposes of applying Table 514.3(B)(1) and Table 514.3(B)(2) to motor fuel dispensing equipment on floating or fixed piers, wharfs, or docks. Closed Construction. Where the construction of floating docks, piers, or wharfs is closed so that there is no space between the bottom of the dock, pier, or wharf and the water, as in the case of concrete-enclosed expanded foam or similar construction, and the construction includes integral service boxes with supply chases, the following shall apply:The space above the surface of the floating dock, pier, or wharf shall be a Class I, Division 2 location with distances in accordance with Table 514.3(B)(1) for dispenser and outdoor locations.Spaces below the surface of the floating dock, pier, or wharf that have areas or enclosures, such as tubs, voids, pits, vaults, boxes, depressions, fuel piping chases, or similar spaces, where flammable liquid or vapor can accumulate shall be a Class I, Division 1 location.Exception No. 1: Dock, pier, or wharf sections that do not support fuel dispensers and abut, but are located 6.0 m (20 ft) or more from, dock sections that support a fuel dispenser(s) shall be permitted to be Class I, Division 2 locations where documented air space is provided between dock sections to allow flammable liquids or vapors to dissipate without traveling to such dock sections. The documentation shall comply with the requirements of 500.4.Exception No. 2: Dock, pier, or wharf sections that do not support fuel dispensers and do not directly abut sections that support fuel dispensers shall be permitted to be unclassified where documented air space is provided and where flammable liquids or vapors cannot travel to such dock sections. The documentation shall comply with the requirements of 500.4.Open Construction. Where the construction of piers, wharfs, or docks is open, as in the case of decks built on stringers supported by pilings, floats, pontoons, or similar construction, the following shall apply:The area 450 mm (18 in.) above the surface of the dock, pier, or wharf and extending 6.0 m (20 ft) horizontally in all directions from the outside edge of the dispenser and down to the water level shall be a Class I, Division 2 location.Enclosures such as tubs, voids, pits, vaults, boxes, depressions, piping chases, or similar spaces where flammable liquids or vapors can accumulate within 6.0 m (20 ft) of the dispenser shall be a Class I, Division 1 location.FIGURE 514.3 Classified Areas Adjacent to Dispensers. [30A: Figure 8.3.3(a)]FIGURE 514.3(B) Classified Areas Adjacent to Dispenser Mounted on Aboveground Storage Tank. [30A: Figure 8.3.3(b)]Table 514.3(B)(1) Class I Locations - Motor Fuel Dispensing Facilities Location Division (Group D) Zone (Group IIA) Extent of Classified Location1 Dispensing Device (except Overhead Type)2, 3 Under dispenser containment 1 1 Entire space within and under dispenser pit or containment Dispenser 2 2 Within 450 mm (18 in.) of dispenser enclosure or that portion of dispenser enclosure containing liquid-handling components, extending horizontally in all directions and down to grade level Outdoor 2 2 Up to 450 mm (18 in.) above grade level, extending 6 m (20 ft) horizontally in all directions from dispenser enclosure Indoor - with mechanical ventilation 2 2 Up to 450 mm (18 in.) above floor level, extending 6 m (20 ft) horizontally in all directions from dispenser enclosure - with gravity ventilation 2 2 Up to 450 mm (18 in.) above floor level, extending 7.5 m (25 ft) horizontally in all directions from dispenser enclosure Dispensing Device - Overhead Type4 1 1 Space within dispenser enclosure and all electrical equipment integral with dispensing hose or nozzle 2 2 Within 450 mm (18 in.) of dispenser enclosure, extending horizontally in all directions and down to grade level 2 2 Up to 450 mm (18 in.) above grade level, extending 6 m (20 ft) horizontally in all directions from a point vertically below edge of dispenser enclosure Remote Pump - Outdoor 1 1 Entire space within any pit or box below grade level, any part of which is within 3 m (10 ft) horizontally from any edge of pump 2 2 Within 900 mm (3 ft) of any edge of pump, extending horizontally in all directions 2 2 Up to 450 mm (18 in.) above grade level, extending 3 m (10 ft) horizontally in all directions from any edge of pump Indoor 1 1 Entire space within any pit 2 2 Within 1.5 m (5 ft) of any edge of pump, extending in all directions 9 2 Up to 900 mm (3 ft) above floor level, extending 7.5 m (25 ft) horizontally in all directions from any edge of pump Sales, Storage, Rest Rooms including structures (such as the attendant's kiosk) on or adjacent to dispensers unclassified unclassified Except as noted below 1 1 Entire volume, if there is any opening to room within the extent of a Division 1 or Zone 1 location 2 2 Entire volume, if there is any opening to room within the extent of a Division 2 or Zone 2 location Tank, Aboveground Inside tank 1 0 Entire inside volume Shell, ends, roof, dike area 1 1 Entire space within dike, where dike height exceeds distance from tank shell to inside of dike wall for more than 50 percent of tank circumference 2 2 Entire space within dike, where dike height does not exceed distance from tank shell to inside of dike wall for more than 50 percent of tank circumference Vent 2 2 Within 3 m (10 ft) of shell, ends, or roof of tank 1 1 Within 1.5 m (5 ft) of open end of vent, extending in all directions 2 2 Between 1.5 m and 3 m (5 ft and 10 ft) from open end of vent, extending in all directions Tank, Underground Inside tank 1 0 Entire inside volume Fill Opening 1 1 Entire space within any pit or box below grade level, any part of which is within a Division 1 or Division 2 classified location or within a Zone 1 or Zone 2 classified location 2 2 Up to 450 mm (18 in.) above grade level, extending 1.5 m (5 ft) horizontally in all directions from any tight-fill connection and extending 3 m (10 ft) horizontally in all directions from any loose-fill connection Vent 1 1 Within 1.5 m (5 ft) of open end of vent, extending in all directions 2 2 Between 1.5 m and 3 m (5 ft and 10 ft) from open end of vent, extending in all directions Vapor Processing System Pits 1 1 Entire space within any pit or box below grade level, any part of which: (1) is within a Division 1 or Division 2 classified location; (2) is within a Zone 1 or Zone 2 classified location: (3) houses any equipment used to transfer or process vapors Equipment in protective enclosures 2 2 Entire space within enclosure Equipment not within protective enclosure 2 2 Within 450 mm (18 in.) of equipment containing flammable vapors or liquid, extending horizontally in all directions and down to grade level 2 2 Up to 450 mm (18 in.) above grade level within 3 m (10 ft) horizontally of the vapor processing equipment - Equipment enclosure 1 1 Entire space within enclosure, if flammable vapor or liquid is present under normal operating conditions 2 2 Entire space within enclosure, if flammable vapor or liquid is not present under normal operating conditions - Vacuum assist blower 2 2 Within 450 mm (18 in.) of blower, extending horizontally in all directions and down to grade level 2 2 Up to 450 mm (18 in.) above grade level, extending 3 m (10 ft) horizontally in all directions Vault 1 1 Entire interior space, if Class I liquids are stored within 1For marine application, grade level means the surface of a pier, extending down to water level.2Refer to Figure 514.3 and Figure 514.3(B) for an illustration of classified location around dispensing devices.3Area classification inside the dispenser enclosure is covered in UL 87, Standard for Power-Operated Dispensing Devices for Petroleum Products.4Ceiling-mounted hose reel. [30A:Table 8.3.1]Table 514.3(B)(2) Electrical Equipment Classified Areas for Dispensing Devices Dispensing Device Extent of Classified Area Class I, Division 1 Class I, Division 2 Compressed natural gas (CNG) Entire space within the dispenser enclosure 1.5 m (5 ft) in all directions from dispenser enclosure Liquefied natural gas (LNG) Entire space within the dispenser enclosure 3 m (10 ft) in all directions from the dispenser enclosure Liquefied petroleum gas (LP-Gas) Entire space within the dispenser enclosure; 450 mm (18 in.) from the exterior surface of the dispenser enclosure to an elevation of 1.22 m (4 ft) above the base of the dispenser; the entire pit or open space beneath the dispenser and within 6 m (20 ft) horizontally from any edge of the dispenser when the pit or trench is not mechanically ventilated Up to 450 mm (18 in.) above ground and within 6 m (20 ft) horizontally from any edge of the dispenser enclosure, including pits or trenches within this area when provided with adequate mechanical ventilation [30A:Table 12.6.2] [514.3(C)(2)](https://2023.antflix.net#514.3(C)(2)) | https://2023.antflix.net#514.3(C)(2) |
Chaptewr 5 Special Occupancies | 514.4 | All electrical equipment and wiring installed in the hazardous (classified) locations specified in 514.3 shall comply with Parts II and III of Article 501. Conductor insulation in these locations shall comply with 501.20. [514.4](https://2023.antflix.net#514.4) | https://2023.antflix.net#514.4 |
Chaptewr 5 Special Occupancies | 514.7 | Fixed wiring and equipment above hazardous (classified) locations shall be installed in accordance with 514.3 and shall be one or more of the following: Rigid metal conduit (RMC) or intermediate metal conduit (IMC) with listed threaded or threadless fittings, or electrical metallic tubing (EMT) with listed fittings.Rigid polyvinyl chloride conduit (PVC), reinforced thermosetting resin conduit (RTRC), or electrical nonmetallic tubing (ENT).Flexible metal conduit (FMC), liquidtight flexible metal conduit (LFMC), or liquidtight flexible nonmetallic conduit (LFNC), with listed fittings.Type MC cable, Type AC cable, Type TC cable, or Type TC-ER cable, including installation in cable trays, with listed fittings. Type TC-ER cable shall include an equipment grounding conductor (EGC) in addition to any drain wire.Type MI cable terminated with listed fittings and supported to avoid tensile stress.Manufactured wiring systems.Type PLTC cable or Type PLTC-ER cable used in Class 2 or Class 3 circuits. Type PLTC-ER cable shall include an equipment grounding conductor (EGC) in addition to any drain wire.Type ITC cable or ITC-ER cable in accordance with 335.4 and 335.5 and terminated with listed fittings. Type ITC-ER cable shall include an equipment grounding conductor (EGC) in addition to any drain wire.Cellular metal floor raceways or cellular concrete floor raceways only for supplying ceiling outlets or extensions to the area below the floor. Such raceways shall have no connections leading into or through any Class I location above the floor. [514.7](https://2023.antflix.net#514.7) | https://2023.antflix.net#514.7 |
Chaptewr 5 Special Occupancies | 514.8 | All underground wiring shall comply with 514.8(A), (B), or (C). [514.8](https://2023.antflix.net#514.8) | https://2023.antflix.net#514.8 |
Chaptewr 5 Special Occupancies | 514.8(A) | Threaded rigid metal conduit (RMC) or threaded intermediate metal conduit (IMC) with listed threaded fittings shall be permitted. Any portion of electrical wiring that is below the surface of a Class I, Division 1 or Division 2 location [as classified in Table 514.3(B)(1) and Table 514.3(B)(2)] shall be sealed within 3.05 m (10 ft) of the point of emergence above grade. The conduit shall not contain any unions, couplings, boxes, or fittings between the conduit seal and the point of emergence above grade. [514.8(A)](https://2023.antflix.net#514.8(A)) | https://2023.antflix.net#514.8(A) |
Chaptewr 5 Special Occupancies | 514.8(B) | Type MI cable shall be permitted where it is installed in accordance with Part II of Article 332. [514.8(B)](https://2023.antflix.net#514.8(B)) | https://2023.antflix.net#514.8(B) |
Chaptewr 5 Special Occupancies | 514.8(C) | Rigid polyvinyl chloride conduit (PVC), reinforced thermosetting resin conduit (RTRC), or high-density polyethylene conduit (HDPE) shall be permitted where buried under not less than 600 mm (2 ft) of cover. Where PVC conduit, RTRC conduit, or HDPE conduit is used, threaded rigid metal conduit (RMC) or threaded intermediate metal conduit (IMC) shall be used for the last 600 mm (2 ft) of the underground run to emergence or to the point of connection to the aboveground raceway. An equipment grounding conductor (EGC) shall be included to provide electrical continuity of the raceway system and for grounding of noncurrent-carrying metal parts. [514.8(C)](https://2023.antflix.net#514.8(C)) | https://2023.antflix.net#514.8(C) |
Chaptewr 5 Special Occupancies | 514.9(A) | A listed seal shall be provided in each conduit run entering or leaving a dispenser or any cavities or enclosures in direct communication therewith. The sealing fitting or listed explosionproof reducer at the seal shall be the first fitting after the conduit emerges from the earth or concrete. [514.9(A)](https://2023.antflix.net#514.9(A)) | https://2023.antflix.net#514.9(A) |
Chaptewr 5 Special Occupancies | 514.9(B) | Additional seals shall be provided in accordance with 501.15. Sections 501.15(A)(4) and (B)(2) shall apply to horizontal as well as to vertical boundaries of the defined Class I locations. [514.9(B)](https://2023.antflix.net#514.9(B)) | https://2023.antflix.net#514.9(B) |
Chaptewr 5 Special Occupancies | 514.11(A) | Fuel dispensing systems shall be provided with one or more clearly identified emergency shutoff devices or electrical disconnects. Such devices or disconnects shall be installed in approved locations but not less than 6 m (20 ft) or more than 30 m (100 ft) from the fuel dispensing devices that they serve. Emergency shutoff devices or electrical disconnects shall disconnect power to all dispensing devices; to all remote pumps serving the dispensing devices; to all associated power, control, and signal circuits; and to all other electrical equipment in the hazardous (classified) locations surrounding the fuel dispensing devices. When more than one emergency shutoff device or electrical disconnect is provided, all devices shall be interconnected. Resetting from an emergency shutoff condition shall require manual intervention and the manner of resetting shall be approved by the authority having jurisdiction. [30A:6.7] The emergency shutoff device shall disconnect simultaneously from the source of supply, all conductors of the circuits, including the grounded conductor, if any. Equipment grounding conductors shall remain connected. Exception: Intrinsically safe systems shall not be required to meet this requirement. [514.11(A)](https://2023.antflix.net#514.11(A)) | https://2023.antflix.net#514.11(A) |
Chaptewr 5 Special Occupancies | 514.11(B) | At attended motor fuel dispensing facilities, the devices or disconnects shall be readily accessible to the attendant. [30A:6.7.1] [514.11(B)](https://2023.antflix.net#514.11(B)) | https://2023.antflix.net#514.11(B) |
Chaptewr 5 Special Occupancies | 514.11(C) | At unattended motor fuel dispensing facilities, the devices or disconnects shall be readily accessible to patrons and at least one additional device or disconnect shall be readily accessible to each group of dispensing devices on an individual island. [30A:6.7.2] [514.11(C)](https://2023.antflix.net#514.11(C)) | https://2023.antflix.net#514.11(C) |
Chaptewr 5 Special Occupancies | 514.13 | Each dispensing device shall be provided with a means to remove all external voltage sources, including power, communications, data, and video circuits and including feedback, during periods of maintenance and service of the dispensing equipment. The location of this means shall be permitted to be other than inside or adjacent to the dispensing device. The means shall be capable of being locked in the open position in accordance with 110.25. [514.13](https://2023.antflix.net#514.13) | https://2023.antflix.net#514.13 |
Chaptewr 5 Special Occupancies | 514.16 | All metal raceways, the metal armor or metallic sheath on cables, and all non—current-carrying metal parts of fixed and portable electrical equipment, regardless of voltage, shall be grounded and bonded. Grounding and bonding in Class I locations shall comply with 501.30. [514.16](https://2023.antflix.net#514.16) | https://2023.antflix.net#514.16 |
Chaptewr 5 Special Occupancies | 515.1 | This article covers a property or portion of a property where flammable liquids are received by tank vessel, pipelines, tank car, or tank vehicle and are stored or blended in bulk for the purpose of distributing such liquids by tank vessel, pipeline, tank car, tank vehicle, portable tank, or container. Informational Note: See NFPA 30-2021, Flammable and Combustible Liquids Code, for extracted text that is followed by a reference in brackets. Only editorial changes were made to the extracted text to make it consistent with this Code. [515.1](https://2023.antflix.net#515.1) | https://2023.antflix.net#515.1 |
Chaptewr 5 Special Occupancies | 515.2 | In addition to the requirements of this article, bulk storage plants shall comply with Table 515.2, as applicable, except as modified by this article. Table 515.2 Other Articles Requirement Division ClassifiedLocations Zone ClassifiedLocations Area classification 500.5, 500.6 505.5, 505.6, 505.7 Equipment Part III of 501, 500.7, 500.8, 501.5 505.8, 505.9, 505.20, 505.22 Wiring Part II of 501 505.15, 505.16, 505.17, 505.18, 505.19, 505.26, 505.30 [515.2](https://2023.antflix.net#515.2) | https://2023.antflix.net#515.2 |
Chaptewr 5 Special Occupancies | 515.3 | Where the term "Class I" is used with respect to Zone classifications within this article of the Code, it shall apply to Zone 0, Zone 1, and Zone 2 designations. Informational Note No. 1: The term "Class I" was originally included as a prefix to Zone 0, Zone 1, and Zone 2 locations and references as an identifier for flammable gases, vapors, or liquids to differentiate from Class II and Class III locations. Zone 0, Zone 1, and Zone 2 only apply to flammable gases, vapors, or liquids so the "Class I" prefix is redundant and has been deleted, except for text that is extracted from other documents or to remain consistent throughout this article. Table 515.3 shall be applied where Class I flammable liquids are stored, handled, or dispensed and shall be used to delineate and classify bulk storage plants. The classified location shall not extend beyond a floor, wall, roof, or other solid partition that has no communicating openings. Where the installation does not meet the requirements found in Table 515.3, the authority having jurisdiction shall have the authority to classify the extent of the classified space. Informational Note No. 2: See NFPA 30, Flammable and Combustible Liquids Code, Chapter 5, for the area classifications listed in Table 515.3 that are based on the premise that the installation meets all the applicable requirements. Informational Note No. 3: See 514.3(C) through (E) for gasoline dispensing stations in marinas and boatyards. Informational Note No. 4: See NFPA 30, Flammable and Combustible Liquids Code, Section 7.3, for additional information. FIGURE 515.3 Area Classification for a Marine Terminal Handling Flammable Liquids. [30: Figure 29.3.22] Table 515.3 Electrical Area Classifications Location Division Zone Extent of Classified Area Indoor equipment installed where flammable vapor—air mixtures can exist under normal operation (see Informational Note) 1 0 The entire area associated with such equipment where flammable gases or vapors are present continuously or for long periods of time 1 1 Area within 1.5 m (5 ft) of any edge of such equipment, extending in all directions 2 2 Area between 1.5 m and 2.5 m (5 ft and 8 ft) of any edge of such equipment, extending in all directions; also, space up to 900 mm (3 ft) above floor or grade level within 1.5 m to 7.5 m (5 ft to 25 ft) horizontally from any edge of such equipment1 Outdoor equipment installed where flammable vapor—air mixtures can exist under normal operation 1 0 The entire area associated with such equipment where flammable gases or vapors are present continuously or for long periods of time 1 1 Area within 900 mm (3 ft) of any edge of such equipment, extending in all directions 2 2 Area between 900 mm (3 ft) and 2.5 m (8 ft) of any edge of such equipment, extending in all directions; also, space up to 900 mm (3 ft) above floor or grade level within 900 mm to 3.0 m (3 ft to 10 ft) horizontally from any edge of such equipment Tank storage installations inside buildings 1 1 All equipment located below grade level 2 2 Any equipment located at or above grade level Tank - aboveground, fixed roof 1 0 Inside fixed roof tank 1 1 Area inside dike where dike height is greater than the distance from the tank to the dike for more than 50 percent of the tank circumference 2 2 Within 3.0 m (10 ft) from shell, ends, or roof of tank; also, area inside dike to level of top of dike wall 1 0 Area inside of vent piping or opening 1 1 Within 1.5 m (5 ft) of open end of vent, extending in all directions 2 2 Area between 1.5 m and 3.0 m (5 ft and 10 ft) from open end of vent, extending in all directions Tank - aboveground, floating roof With fixed outer roof 1 0 Area between the floating and fixed roof sections and within the shell With no fixed outer roof 1 1 Area above the floating roof and within the shell Tank vault - interior 1 1 Entire interior volume, if Class I liquids are stored within Underground tank fill opening 1 1 Any pit, box, or space below grade level, if any part is within a Division 1 or 2, or Zone 1 or 2 classified location 2 2 Up to 450 mm (18 in.) above grade level within a horizontal radius of 3.0 m (10 ft) from a loose fill connection, and within a horizontal radius of 1.5 m (5 ft) from a tight fill connection Vent - discharging upward 1 0 Area inside of vent piping or opening 1 1 Within 900 mm (3 ft) of open end of vent, extending in all directions 2 2 Area between 900 mm and 1.5 m (3 ft and 5 ft) of open end of vent, extending in all directions Drum and container filling - outdoors or indoors 1 0 Area inside the drum or container 1 1 Within 900 mm (3 ft) of vent and fill openings, extending in all directions 2 2 Area between 900 mm and 1.5 m (3 ft and 5 ft) from vent or fill opening, extending in all directions; also, up to 450 mm (18 in.) above floor or grade level within a horizontal radius of 3.0 m (10 ft) from vent or fill opening Pumps, bleeders, withdrawal fittings Indoor 2 2 Within 1.5 m (5 ft) of any edge of such devices, extending in all directions; also, up to 900 mm (3 ft) above floor or grade level within 7.5 m (25 ft) horizontally from any edge of such devices Outdoor 2 2 Within 900 mm (3 ft) of any edge of such devices, extending in all directions. Also, up to 450 mm (18 in.) above grade level within 3.0 m (10 ft) horizontally from any edge of such devices Pits and sumps Without mechanical ventilation 1 1 Entire area within a pit or sump if any part is within a Division 1 or 2 or Zone 1 or 2 classified location With adequate mechanical ventilation 2 2 Entire area within a pit or sump if any part is within a Division 1 or 2 or Zone 1 or 2 classified location Containing valves, fittings, or piping, and not within a Division 1 or 2 or Zone 1 or 2 classified location 2 2 Entire pit or sump Drainage ditches, separators, impounding basins Outdoor 2 2 Area up to 450 mm (18 in.) above ditch, separator, or basin; also, area up to 450 mm (18 in.) above grade within 4.5 m (15 ft) horizontally from any edge Indoor Same as pits and sumps Tank vehicle and tank car2 Loading through open dome 1 0 Area inside of the tank 1 1 Within 900 mm (3 ft) of edge of dome, extending in all directions 2 2 Area between 900 mm and 4.5 m (3 ft and 15 ft) from edge of dome, extending in all directions Loading through bottom connections with atmospheric venting 1 0 Area inside of the tank 1 1 Within 900 mm (3 ft) of point of venting to atmosphere, extending in all directions 2 2 Area between 900 mm and 4.5 m (3 ft and 15 ft) from point of venting to atmosphere, extending in all directions; also, up to 450 mm (18 in.) above grade within a horizontal radius of 3.0 m (10 ft) from point of loading connection Loading through closed dome with atmospheric venting 1 1 Within 900 mm (3 ft) of open end of vent, extending in all directions 2 2 Area between 900 mm and 4.5 m (3 ft and 15 ft) from open end of vent, extending in all directions; also, within 900 mm (3 ft) of edge of dome, extending in all directions Loading through closed dome with vapor control 2 2 Within 900 mm (3 ft) of point of connection of both fill and vapor lines extending in all directions Bottom loading with vapor control or any bottom unloading 2 2 Within 900 mm (3 ft) of point of connections, extending in all directions; also up to 450 mm (18 in.) above grade within a horizontal radius of 3.0 m (10 ft) from point of connections Storage and repair garage for tank vehicles 1 1 All pits or spaces below floor level 2 2 Area up to 450 mm (18 in.) above floor or grade level for entire storage or repair garage Garages for other than tank vehicles Unclassified If there is any opening to these rooms within the extent of an outdoor classified location, the entire room shall be classified the same as the area classification at the point of the opening. Outdoor drum storage Unclassified Inside rooms or storage lockers used for the storage of Class I liquids 2 2 Entire room or locker Indoor warehousing where there is no flammable liquid transfer Unclassified If there is any opening to these rooms within the extent of an indoor classified location, the classified location shall extend through the opening to the same extent as if the wall, curb, or partition did not exist. Office and rest rooms Unclassified If there is any opening to these rooms within the extent of an indoor classified location, the room shall be classified the same as if the wall, curb, or partition did not exist. Piers and wharves See Figure 515.3. 1The release of Class I liquids can generate vapors to the extent that the entire building, and possibly an area surrounding it, should be considered a Class I, Division 2 or Zone 2 location. 2When classifying extent of area, consideration shall be given to the fact that tank cars or tank vehicles can be spotted at varying points. Therefore, the extremities of the loading or unloading positions shall be used. [30:Table 7.3.3] [515.3](https://2023.antflix.net#515.3) | https://2023.antflix.net#515.3 |
Chaptewr 5 Special Occupancies | 515.4 | All electrical wiring and equipment within the hazardous (classified) locations specified in 515.3 shall comply with the applicable requirements of Table 515.2. [515.4](https://2023.antflix.net#515.4) | https://2023.antflix.net#515.4 |
Chaptewr 5 Special Occupancies | 515.7(A) | All fixed wiring above hazardous (classified) locations shall comply with 501.10(B) or 505.15(C), as applicable. [515.7(A)](https://2023.antflix.net#515.7(A)) | https://2023.antflix.net#515.7(A) |
Chaptewr 5 Special Occupancies | 515.7(B) | Fixed equipment that might produce arcs, sparks, or particles of hot metal, such as lamps and lamp-holders for fixed lighting, cutouts, switches, receptacles, motors, or other equipment having make-and-break or sliding contacts, shall be of the totally enclosed type or be constructed to prevent the escape of sparks or hot metal particles. [515.7(B)](https://2023.antflix.net#515.7(B)) | https://2023.antflix.net#515.7(B) |
Chaptewr 5 Special Occupancies | 515.7(C) | Portable luminaires or other utilization equipment and their flexible cords shall comply with Part III of Article 501 or 505.17 for the class of location above which they are connected or used. [515.7(C)](https://2023.antflix.net#515.7(C)) | https://2023.antflix.net#515.7(C) |
Chaptewr 5 Special Occupancies | 515.8(A) | Underground wiring shall be installed in threaded rigid metal conduit or threaded steel intermediate metal conduit or, where buried under not less than 600 mm (2 ft) of cover, shall be permitted in PVC conduit, RTRC conduit, or a listed cable. Where PVC conduit or RTRC conduit is used, threaded rigid metal conduit or threaded steel intermediate metal conduit shall be used for not less than the last 600 mm (2 ft) of the conduit run to the conduit point of emergence from the underground location or to the point of connection to an aboveground raceway. Where cable is used, it shall be enclosed in threaded rigid metal conduit or threaded steel intermediate metal conduit from the point of lowest buried cable level to the point of connection to the above-ground raceway. [515.8(A)](https://2023.antflix.net#515.8(A)) | https://2023.antflix.net#515.8(A) |
Chaptewr 5 Special Occupancies | 515.8(B) | Conductor insulation shall comply with 501.20. [515.8(B)](https://2023.antflix.net#515.8(B)) | https://2023.antflix.net#515.8(B) |
Chaptewr 5 Special Occupancies | 515.8(C) | Where PVC conduit, RTRC conduit, or cable with a nonmetallic sheath is used, an equipment grounding conductor shall be included to provide for electrical continuity of the raceway system and for grounding of noncurrent-carrying metal parts. [515.8(C)](https://2023.antflix.net#515.8(C)) | https://2023.antflix.net#515.8(C) |
Chaptewr 5 Special Occupancies | 515.9 | Sealing requirements shall apply to horizontal as well as to vertical boundaries of the defined Class I locations. Buried raceways and cables under defined Class I locations shall be considered to be within a Class I, Division 1 or Zone 1 location. [515.9](https://2023.antflix.net#515.9) | https://2023.antflix.net#515.9 |
Chaptewr 5 Special Occupancies | 515.10 | In addition to the requirements of this article, dispensers for gasoline or other volatile flammable liquids or liquified flammable gases shall comply with the requirements for motor fuel dispensing facilities, as applicable, except as modified by this article. [515.10](https://2023.antflix.net#515.10) | https://2023.antflix.net#515.10 |
Chaptewr 5 Special Occupancies | 515.16 | All metal raceways, the metal armor or metallic sheath on cables, and all non—current-carrying metal parts of fixed or portable electrical equipment, regardless of voltage, shall be grounded and bonded. Grounding and bonding in Class I locations shall comply with 501.30 for Class I, Division 1 and 2 locations and 505.30 for Zone 0, 1, and 2 locations. Informational Note: See NFPA 30, Flammable and Combustible Liquids Code, 6.5.4, for information on grounding for static protection. [515.16](https://2023.antflix.net#515.16) | https://2023.antflix.net#515.16 |
Chaptewr 5 Special Occupancies | 516.1 | This article covers the regular or frequent application of flammable liquids, combustible liquids, and combustible powders by spray operations and the application of flammable liquids or combustible liquids at temperatures above their flashpoint by spraying, dipping, coating, printing, or other means. Informational Note No. 1: See NFPA 33-2021, Standard for Spray Application Using Flammable or Combustible Materials, or NFPA 34-2021, Standard for Dipping, Coating, and Printing Processes Using Flammable or Combustible Liquids, for extracted text that is followed by a reference in brackets. Only editorial changes were made to the extracted text to make it consistent with this Code. Informational Note No. 2: See NFPA 91, Standard for Exhaust Systems for Air Conveying of Vapors, Gases, Mists, and Particulate Solids, for information regarding ventilation. [516.1](https://2023.antflix.net#516.1) | https://2023.antflix.net#516.1 |
Chaptewr 5 Special Occupancies | 516.2 | In addition to the requirements of this article, spray application, dipping, coating, and printing processes using flammable or combustible materials shall comply with Table 516.2, as applicable, except as modified by this article. Table 516.2 Other Articles Requirement Division Classified Locations Zone Classified Locations Area classification 500.5, 500.6 505.5, 505.6, 505.7, 506.5, 506.6, 506.7 Equipment 500.7, 500.8, 501.5, 502.5, 502.6, Part III of 501, Part III of 502 505.8, 505.9, 505.20, 505.22, 506.8, 506.9 Wiring Part II of 501, Part II of 502 505.15, 505.16, 505.17, 505.18, 505.19, 505.26, 505.30, 506.15, 506.17, 506.20, 506.30 [516.2](https://2023.antflix.net#516.2) | https://2023.antflix.net#516.2 |
Chaptewr 5 Special Occupancies | 516.3 | Where the term Class I is used with respect to Zone classifications within this article of the Code, it shall apply to Zone 0, Zone 1, and Zone 2 designations. Informational Note: The term Class I was originally included as a prefix to Zone 0, Zone 1, and Zone 2 locations and references as an identifier for flammable gases, vapors, or liquids to differentiate from Class II and Class III locations. Zone 0, Zone 1, and Zone 2 only apply to flammable gases, vapors, or liquids so the Class I prefix is redundant and has been deleted, except for text that is extracted from other documents or to remain consistent throughout this article. [516.3](https://2023.antflix.net#516.3) | https://2023.antflix.net#516.3 |
Chaptewr 5 Special Occupancies | 516.4 | Area classification for open containers, supply containers, waste containers, spray gun cleaners, and solvent distillation units that contain Class I liquids and are located in ventilated areas shall be in accordance with the following: The area within 915 mm (3 ft) in all directions from any such container or equipment and extending to the floor or grade level shall be classified as Class I, Division 1 or Zone 1, whichever is applicable. [33:6.5.5.1(1)]The area extending 610 mm (2 ft) beyond the Division 1 or Zone 1 location shall be classified as Class I, Division 2 or Zone 2, whichever is applicable. [33:6.5.5.1(2)]The area extending 1525 mm (5 ft) horizontally beyond the area described in 516.4(2) up to a height of 460 mm (18 in.) above the floor or grade level shall be classified as Class I, Division 2 or Zone 2, whichever is applicable. [33:6.5.5.1(3)]The area inside any tank or container shall be classified as Class I, Division 1 or Zone 0, whichever is applicable. [33:6.5.5.1(4)]Sumps, pits, or belowgrade channels within 3.05 m (10 ft) horizontally of a vapor source shall be classified as Class I, Division 1 or Zone 1. If the sump, pit, or channel extends beyond 3.05 m (10 ft) from the vapor source, it shall be provided with a vapor stop or be classified as Class I, Division 1 or Zone 1 for its entire length.For the purposes of electrical area classification, the Division system and the Zone system shall not be intermixed for any given source of release. [33:6.2.3]Electrical wiring and utilization equipment installed in these areas shall be suitable for the location, as shown in Figure 516.4. [33:6.5.5.2]FIGURE 516.4 Electrical Area Classification for Class I Liquid Operations Around Open Containers. Supply Containers, Waste Containers, Spray Gun Cleaners, and Solvent Distillation Units. [33: Figure 6.5.5.2] [516.4](https://2023.antflix.net#516.4) | https://2023.antflix.net#516.4 |
Chaptewr 5 Special Occupancies | 516.5 | For spray application processes, the area classification is based on quantities of flammable vapors, combustible mists, residues, dusts, or deposits that are present or might be present in quantities sufficient to produce ignitable or explosive mixtures with air. [516.5](https://2023.antflix.net#516.5) | https://2023.antflix.net#516.5 |
Chaptewr 5 Special Occupancies | 516.5(A)(1) | The Zone system of electrical area classification shall be applied as follows: The inside of closed containers or vessels shall be considered a Class I, Zone 0 location.A Class I, Division 1 location shall be permitted to be alternatively classified as a Class I, Zone 1 location.A Class I, Division 2 location shall be permitted to be alternatively classified as a Class I, Zone 2 location.A Class II, Division 1 location shall be permitted to be alternatively classified as a Zone 21 location.A Class II, Division 2 location shall be permitted to be alternatively classified as a Zone 22 location. [33:6.2.2] [516.5(A)(1)](https://2023.antflix.net#516.5(A)(1)) | https://2023.antflix.net#516.5(A)(1) |
Chaptewr 5 Special Occupancies | 516.5(A)(2) | For the purposes of electrical area classification, the Division system and the Zone system shall not be intermixed for any given source of release. [33:6.2.3] In instances of areas within the same facility classified separately, Class I, Zone 2 locations shall be permitted to abut, but not overlap, Class I, Division 2 locations. Class I, Zone 0 or Zone 1 locations shall not abut Class I, Division 1 or Division 2 locations. [33:6.2.4] [516.5(A)(2)](https://2023.antflix.net#516.5(A)(2)) | https://2023.antflix.net#516.5(A)(2) |
Chaptewr 5 Special Occupancies | 516.5(A)(3) | Open flames, spark-producing equipment or processes, and equipment whose exposed surfaces exceed the autoignition temperature of the material being sprayed shall not be located in a spray area or in any surrounding area that is classified as Division 2, Zone 2, or Zone 22. [33:6.2.5] Exception: This requirement shall not apply to drying, curing, or fusing apparatus. Any utilization equipment or apparatus that is capable of producing sparks or particles of hot metal and that is located above or adjacent to either the spray area or the surrounding Division 2, Zone 2, or Zone 22 areas shall be of the totally enclosed type or shall be constructed to prevent the escape of sparks or particles of hot metal. [33:6.2.6] [516.5(A)(3)](https://2023.antflix.net#516.5(A)(3)) | https://2023.antflix.net#516.5(A)(3) |
Chaptewr 5 Special Occupancies | 516.5(B) | The interior of any open or closed container or vessel of a flammable liquid shall be considered Class I, Division 1, or Class I, Zone 0. as applicable. Informational Note: See NFPA 33, Standard for Spray Application Using Flammable or Combustible Materials, Chapter 6, for additional information. [516.5(B)](https://2023.antflix.net#516.5(B)) | https://2023.antflix.net#516.5(B) |
Chaptewr 5 Special Occupancies | 516.5(C) | The following spaces shall be considered Class I, Division 1; Class I, Zone 1; Class II, Division 1; or Zone 21 locations, as applicable: The interior of spray booths and rooms except as specifically provided in 516.5(D).The interior of exhaust ducts.Any area in the direct path of spray operations.Sumps, pits, or below grade channels within 7620 mm (25 ft) horizontally of a vapor source. If the sump, pit, or channel extends beyond 7620 mm (25 ft) from the vapor source, it shall be provided with a vapor stop or it shall be classified as Class I, Division 1 for its entire length. [34:6.4.1]All space in all directions outside of but within 900 mm (3 ft) of open containers, supply containers, spray gun cleaners, and solvent distillation units containing flammable liquids.For limited finishing workstations, the area inside the curtains or partitions. [See Figure 516.5(D)(5).] [516.5(C)](https://2023.antflix.net#516.5(C)) | https://2023.antflix.net#516.5(C) |
Chaptewr 5 Special Occupancies | 516.5(D) | The spaces listed in 516.5(D)(1) through (D)(5) shall be considered Class I, Division 2; Class I, Zone 2; Class II, Division 2; or Zone 22 as applicable. [516.5(D)](https://2023.antflix.net#516.5(D)) | https://2023.antflix.net#516.5(D) |
Chaptewr 5 Special Occupancies | 516.5(D)(1) | Electrical wiring and utilization equipment located outside but within 6100 mm (20 ft) horizontally and 3050 mm (10 ft) vertically of an enclosed spray area and not separated from the spray area by partitions extending to the boundaries of the area designated as Division 2, Zone 2 or Zone 22 in Figure 516.5(D)(1) shall be suitable for Class I, Division 2; Class I, Zone 2; Class II, Division 2; or Zone 22 locations, whichever is applicable. [33:6.5.1] [See Figure 516.5(D)(1).] [516.5(D)(1)](https://2023.antflix.net#516.5(D)(1)) | https://2023.antflix.net#516.5(D)(1) |
Chaptewr 5 Special Occupancies | 516.5(D)(2) | If spray application operations are conducted within a closed-top, open-face, or open-front booth or room, as shown in Figure 516.5(D)(2), any electrical wiring or utilization equipment located outside of the booth or room but within 915 mm (3 ft) of any opening shall be suitable for Class I, Division 2; Class I, Zone 2; Class II, Division 2; or Zone 22 locations, whichever is applicable. The Class I, Division 2; Class I, Zone 2; Class II, Division 2; or Zone 22 locations shown in Figure 516.5(D)(2) shall extend from the edges of the open face or open front of the booth or room. [516.5(D)(2)](https://2023.antflix.net#516.5(D)(2)) | https://2023.antflix.net#516.5(D)(2) |
Chaptewr 5 Special Occupancies | 516.5(D)(3) | For spraying operations conducted within an open top spray booth, the space 915 mm (3 ft) vertically above the booth and within 915 mm (3 ft) of other booth openings shall be considered Class I, Division 2; Class I, Zone 2; Class I1. Division 2; or Zone 22 whichever is applicable. [33:6.5.3] [516.5(D)(3)](https://2023.antflix.net#516.5(D)(3)) | https://2023.antflix.net#516.5(D)(3) |
Chaptewr 5 Special Occupancies | 516.5(D)(4) | For spray application operations confined to an enclosed spray booth or room, electrical area classification shall be as follows: The area within 915 mm (3 ft) of any opening shall be classified as Class I, Division 2; Class I, Zone 2; Class II. Division 2; or Zone 22 locations, whichever is applicable, as shown in Figure 516.5(D)(4).Where automated spray application equipment is used, the area outside the access doors shall be unclassified provided the door interlock prevents the spray application operations when the door is open.Where exhaust air is permitted to be recirculated, both of the following shall apply:The interior of any recirculation path from the secondary particulate filters up to and including the air supply plenum shall be classified as Class I, Division 2; Class I, Zone 2; Class II, Division 2; or Zone 22 locations, whichever is applicable.The interior of fresh air supply ducts shall be unclassified.Where exhaust air is not recirculated, the interior of fresh air supply ducts and fresh air supply plenums shall be unclassified.[33:6.5.4] [516.5(D)(4)](https://2023.antflix.net#516.5(D)(4)) | https://2023.antflix.net#516.5(D)(4) |
Chaptewr 5 Special Occupancies | 516.5(D)(5) | For limited finishing workstations, the area inside the 915 mm (3 ft) space horizontally and vertically beyond the volume enclosed by the outside surface of the curtains or partitions shall be classified as Class I, Division 2; Class I, Zone 2; Class II, Division 2; or Zone 22, as shown in Figure 516.5(D)(5).A limited finishing workstation shall be designed and constructed to have all of the following:A dedicated make-up air supplyCurtains or partitions that are noncombustible or limited combustibleA dedicated mechanical exhaust and filtration systemAn approved automatic extinguishing system [33:14.3.1]Informational Note: See NFPA 701, Standard Methods of Fire Tests for Flame Propagation of Textiles and Films, for information on limited combustible curtains or partitions.The amount of material sprayed in a limited finishing workstation shall not exceed 3.8 L (1 gal) in any 8-hour period. [33:14.3.2]Curtains or partitions shall be fully closed during any spray operations. [33:14.3.4]The equipment within the limited finishing workstation shall be interlocked such that the spray application equipment cannot be operated unless the exhaust ventilation system is operating and functioning properly and spray application is automatically stopped if the exhaust ventilation system fails.Any limited finishing workstation used for spray application operations shall not be used for any operation that is capable of producing sparks or particles of hot metal or for operations that involve open flames or electrical utilization equipment capable of producing sparks or particles of hot metal. [33:14.3.6]Where industrial air heaters are used to elevate the air temperature for drying, curing, or fusing operations, a high limit switch shall be provided to automatically shut off the drying apparatus if the air temperature in the limited finishing workstation exceeds the maximum discharge-air temperature allowed by the standard that the heater is listed to or 93°C, (200°F), whichever is less. [33:14.3.7.1]A means shall be provided to show that the limited finishing workstation is in the drying or curing mode of operation and that the limited finishing workstation is to be unoccupied. [33:14.3.7.2]Any containers of flammable or combustible liquids shall be removed from the limited finishing workstation before the drying apparatus is energized. [33:14.3.7.3]Portable spot-drying, curing, or fusion apparatus shall be permitted to be used in a limited finishing workstation, provided that it is not located within the hazardous (classified) location defined in 14.3.5 of NFPA 33 when spray application operations are being conducted. [33:14.3.8]Recirculation of exhaust air shall be permitted when the provisions of 516.5(D)(4)(3) are both met. [33:14.3.9]FIGURE 516.5(D)(1) Electrical Area Classification for Unenclosed Spray Areas. [33:Figure 6.5.1]FIGURE 516.5(D)(2) Class I, Division 2; Class I. Zone 2; Class II, Division 2; or Zone 22 Locations Adjacent to a Closed Top, Open Face, or Open Front Spray Booth or Room. [33:Figure 6.5.2(a)]FIGURE 516.5(D)(4) Class I, Division 2; Class I, Zone 2; Class II, Division 2; or Zone 22 Locations Adjacent to an Enclosed Spray Booth or Spray Room. [33:Figure 6.5.4]FIGURE 516.5(D)(5) Class I, Division 2; Class I, Zone 2; Class II, Division 2; or Zone 22 Locations Adjacent to a Limited Finishing Workstation. [33:Figure 14.3.6.1] [516.5(D)(5)](https://2023.antflix.net#516.5(D)(5)) | https://2023.antflix.net#516.5(D)(5) |
Chaptewr 5 Special Occupancies | 516.6(A) | All electrical wiring and equipment within the hazardous (classified) locations (containing vapor only - not residues) defined in 516.5 shall comply with the requirements of Part II and Part III of Article 501 or with 505.17 through 505.30, as applicable. [516.6(A)](https://2023.antflix.net#516.6(A)) | https://2023.antflix.net#516.6(A) |
Chaptewr 5 Special Occupancies | 516.6(B) | Unless specifically listed for locations containing deposits of dangerous quantities of flammable or combustible vapors, mists, residues, dusts, or deposits (as applicable), there shall be no electrical equipment in any spray area as herein defined whereon deposits of combustible residue could readily accumulate, except wiring in rigid metal conduit, intermediate metal conduit, Type MI cable, or in metal boxes or fittings containing no taps, splices, or terminal connections. [33:6.4.2] [516.6(B)](https://2023.antflix.net#516.6(B)) | https://2023.antflix.net#516.6(B) |
Chaptewr 5 Special Occupancies | 516.6(C) | Luminaires shall be permitted to be installed as follows: Luminaires, like that shown in Figure 516.6(C)(1), that are attached to the walls or ceiling of a spray area but that are outside any classified area and are separated from the spray area by glass panels shall be suitable for use in unclassified locations. Such fixtures shall be serviced from outside the spray area. [33:6.6.1]Luminaires, like that shown in Figure 516.6(C)(1), that are attached to the walls or ceiling of a spray area; that are separated from the spray area by glass panels and that are located within a Class I, Division 2; a Class I, Zone 2; a Class II, Division 2; or a Zone 22 location shall be suitable for such location. Such fixtures shall be serviced from outside the spray area. [33:6.6.2]Luminaires, like that shown in Figure 516.6(C)(2), that are an integral part of the walls or ceiling of a spray area shall be permitted to be separated from the spray area by glass panels that are an integral part of the fixture. Such fixtures shall be listed for use in Class I, Division 2; Class I, Zone 2; Class II, Division 2; or Zone 22 locations, whichever is applicable, and also shall be listed for accumulations of deposits of combustible residues. Such fixtures shall be permitted to be serviced from inside the spray area. [33:6.6.3]Glass panels used to separate luminaires from the spray area or that are an integral part of the luminaire shall meet the following requirements:Panels for luminaires or for observation shall be of heat-treated glass, laminated glass, wired glass, or hammered-wired glass and shall be sealed to confine vapors, mists, residues, dusts, and deposits to the spray area. [33:5.5.1]Exception to a.: Listed spray booth assemblies that have vision panels constructed of other materials shall be permitted.Panels for luminaires shall be separated from the luminaire to prevent the surface temperature of the panel from exceeding 93°C (200°F). [33:5.5.2]The panel frame and method of attachment shall be designed to not fail under fire exposure before the vision panel fails. [33:5.5.3] [516.6(C)](https://2023.antflix.net#516.6(C)) | https://2023.antflix.net#516.6(C) |
Chaptewr 5 Special Occupancies | 516.6(D) | Portable electric luminaires or other utilization equipment shall not be used in a spray area during spray operations. Exception No. 1: Where portable electric luminaires are required for operations in spaces not readily illuminated by fixed lighting within the spraying area, they shall be of the type identified for Class I, Division 1 or Class I, Zone 1 locations where readily ignitible residues could be present. [33:6.9 Exception] Exception No. 2: Where portable electric drying apparatus is used in spray booths and the following requirements are met: (1) The apparatus and its electrical connections are not located within the spray enclosure during spray operations. (2) Electrical equipment within 450 mm (18 in.) of the floor is identified for Class I, Division 2 or Class I, Zone 2 locations. (3) All metallic parts of the drying apparatus are electrically bonded and grounded. (4) Interlocks are provided to prevent the operation of spray equipment while, drying apparatus is within the spray enclosure, to allow for a 3-minute purge of the enclosure before energizing the drying apparatus and to shut off drying apparatus on failure of ventilation system. [516.6(D)](https://2023.antflix.net#516.6(D)) | https://2023.antflix.net#516.6(D) |
Chaptewr 5 Special Occupancies | 516.6(E) | Electrostatic spraying or detearing equipment shall be installed and used only as provided in 516.10. Informational Note: See NFPA 33, Standard for Spray Application Using Flammable or Combustible Materials, for additional information. [516.6(E)](https://2023.antflix.net#516.6(E)) | https://2023.antflix.net#516.6(E) |
Chaptewr 5 Special Occupancies | 516.6(F) | All persons and all electrically conductive objects, including any metal parts of the process equipment or apparatus, containers of material, exhaust ducts, and piping systems that convey flammable or combustible liquids, shall be electrically grounded. [34:6.8.1] FIGURE 516.6(C)(1) Example of a Luminaire Mounted Outside the Spray Area and Serviced from Outside the Spray Area. [33:Figure 6.6.1.1] FIGURE 516.6(C)(2) Example of Luminaires That Are Integral Parts of the Spray Area and That Are Serviced from Inside the Spray Area. [33:Figure 6.6.3.1] [516.6(F)](https://2023.antflix.net#516.6(F)) | https://2023.antflix.net#516.6(F) |
Chaptewr 5 Special Occupancies | 516.7(A) | All fixed wiring above hazardous (classified) locations shall be permitted to be one or more of the following: Rigid metal conduit (RMC) or intermediate metal conduit (IMC) with listed threaded or threadless fittings, or electrical metallic tubing (EMT) with listed fittings.Rigid polyvinyl chloride conduit (PVC), reinforced thermosetting resin conduit (RTRC), or electrical nonmetallic tubing (ENT).Type MC cable, Type TC cable, or Type TC-ER cable, including installation in cable trays, terminated with listed fittings. Type TC-ER cable shall include an equipment grounding conductor (EGC) in addition to any drain wire.Type MI cable terminated with listed fittings and installed and supported to avoid tensile stress.Type PLTC cable or Type PLTC-ER cable used in Class 2 or Class 3 circuits. Type PLTC-ER cable shall include an equipment grounding conductor (EGC) in addition to any drain wire.Type ITC cable or Type ITC-ER cable in accordance with 335.4 and 335.5 and terminated with listed fittings. Type ITC-ER cable shall include an EGC in addition to any drain wire.Cellular metal raceways supplying ceiling outlets or as extensions to the area below the floor of a hazardous (classified) location. If cellular metal raceways are used, they shall not have connections leading into or passing through the hazardous (classified) location unless suitable seals are provided. [516.7(A)](https://2023.antflix.net#516.7(A)) | https://2023.antflix.net#516.7(A) |
Chaptewr 5 Special Occupancies | 516.7(B) | Equipment that could produce arcs, sparks, or particles of hot metal, such as lamps and lampholders for fixed lighting, cutouts, switches, receptacles, motors, or other equipment having make-and-break or sliding contacts, where installed above a classified location or above a location where freshly finished goods are handled, shall be of the totally enclosed type or be constructed to prevent the escape of sparks or hot metal particles. [516.7(B)](https://2023.antflix.net#516.7(B)) | https://2023.antflix.net#516.7(B) |
Chaptewr 5 Special Occupancies | 516.10(A) | This section shall apply to any equipment using electrostatically charged elements for the atomization, charging, and/or precipitation of hazardous materials for coatings on articles or for other similar purposes in which the charging or atomizing device is attached to a mechanical support or manipulator, including robotic devices. This section shall not apply to devices that are held or manipulated by hand. Where robot or programming procedures involve manual manipulation of the robot arm while spraying with the high voltage on, the requirements of 516.10(B) shall apply. The installation of electrostatic spraying equipment shall comply with the requirements of 516.10(A)(1) through (A)(10). Spray equipment shall be listed. All automatic electrostatic equipment systems shall comply with the requirements of 516.6(B) through (D) and 516.6(F). [516.10(A)](https://2023.antflix.net#516.10(A)) | https://2023.antflix.net#516.10(A) |
Chaptewr 5 Special Occupancies | 516.10(A)(1) | Transformers, high-voltage supplies, control apparatus, and all other electrical portions of the equipment shall be installed outside of the Class I location or be of a type identified for the location. Exception: High-voltage grids, electrodes, electrostatic atomizing heads, and their connections shall be permitted within the Class I location. [516.10(A)(1)](https://2023.antflix.net#516.10(A)(1)) | https://2023.antflix.net#516.10(A)(1) |
Chaptewr 5 Special Occupancies | 516.10(A)(2) | Electrodes and electrostatic atomizing heads shall be adequately supported in permanent locations and shall be effectively insulated from ground. Electrodes and electrostatic atomizing heads that are permanently attached to their bases, supports, reciprocators, or robots shall be deemed to comply with this section. [516.10(A)(2)](https://2023.antflix.net#516.10(A)(2)) | https://2023.antflix.net#516.10(A)(2) |
Chaptewr 5 Special Occupancies | 516.10(A)(3) | High-voltage leads shall be properly insulated and protected from mechanical damage or exposure to destructive chemicals. Any exposed element at high voltage shall be effectively and permanently supported on suitable insulators and shall be effectively guarded against accidental contact or grounding. [516.10(A)(3)](https://2023.antflix.net#516.10(A)(3)) | https://2023.antflix.net#516.10(A)(3) |
Chaptewr 5 Special Occupancies | 516.10(A)(4) | Goods being coated using this process shall be supported on conveyors or hangers. The conveyors or hangers shall be arranged (1) to ensure that the parts being coated are electrically connected to ground with a resistance of 1 megohm or less and (2) to prevent parts from swinging. [516.10(A)(4)](https://2023.antflix.net#516.10(A)(4)) | https://2023.antflix.net#516.10(A)(4) |
Chaptewr 5 Special Occupancies | 516.10(A)(5) | Electrostatic apparatus shall be equipped with automatic means that will rapidly de-energize the high-voltage elements under any of the following conditions: Stoppage of ventilating fans or failure of ventilating equipment from any causeStoppage of the conveyor carrying goods through the high-voltage field unless stoppage is required by the spray processOccurrence of excessive current leakage at any point in the high-voltage systemDe-energizing the primary voltage input to the power supply [516.10(A)(5)](https://2023.antflix.net#516.10(A)(5)) | https://2023.antflix.net#516.10(A)(5) |
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