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Chaptewr 5 Special Occupancies | 502.130(A)(3) | Pendant luminaires shall be suspended by threaded rigid metal conduit stems, by threaded steel intermediate metal conduit stems, by chains with approved fittings, or by other approved means. For rigid stems longer than 300 mm (12 in.), permanent and effective bracing against lateral displacement shall be provided at a ... | https://2023.antflix.net#502.130(A)(3) |
Chaptewr 5 Special Occupancies | 502.130(A)(4) | Boxes, box assemblies, or fittings used for the support of luminaires shall be identified for Class II locations. [502.130(A)(4)](https://2023.antflix.net#502.130(A)(4)) | https://2023.antflix.net#502.130(A)(4) |
Chaptewr 5 Special Occupancies | 502.130(B) | In Class II, Division 2 locations, luminaires shall comply with 502.130(B)(1) through (B)(5). [502.130(B)](https://2023.antflix.net#502.130(B)) | https://2023.antflix.net#502.130(B) |
Chaptewr 5 Special Occupancies | 502.130(B)(1) | Portable lighting equipment shall be identified for the location. They shall be clearly marked to indicate the maximum wattage of lamps for which they are designed. [502.130(B)(1)](https://2023.antflix.net#502.130(B)(1)) | https://2023.antflix.net#502.130(B)(1) |
Chaptewr 5 Special Occupancies | 502.130(B)(2) | Luminaires for fixed lighting shall be provided with enclosures that are dusttight or otherwise identified for the location. Each luminaire shall be clearly marked to indicate the maximum wattage of the lamp that shall be permitted without exceeding an exposed surface temperature in accordance with 500.8(D)(2) under no... | https://2023.antflix.net#502.130(B)(2) |
Chaptewr 5 Special Occupancies | 502.130(B)(3) | Luminaires for fixed lighting shall be protected from physical damage by suitable guards or by location. [502.130(B)(3)](https://2023.antflix.net#502.130(B)(3)) | https://2023.antflix.net#502.130(B)(3) |
Chaptewr 5 Special Occupancies | 502.130(B)(4) | Pendant luminaires shall be suspended by threaded rigid metal conduit stems, by threaded steel intermediate metal conduit stems, by chains with approved fittings, or by other approved means. For rigid stems longer than 300 mm (12 in.), permanent and effective bracing against lateral displacement shall be provided at a ... | https://2023.antflix.net#502.130(B)(4) |
Chaptewr 5 Special Occupancies | 502.130(B)(5) | Starting and control equipment for electric-discharge lamps shall comply with the requirements of 502.120(B). [502.130(B)(5)](https://2023.antflix.net#502.130(B)(5)) | https://2023.antflix.net#502.130(B)(5) |
Chaptewr 5 Special Occupancies | 502.135(A) | In Class II, Division 1 locations, all utilization equipment shall be identified for the location. [502.135(A)](https://2023.antflix.net#502.135(A)) | https://2023.antflix.net#502.135(A) |
Chaptewr 5 Special Occupancies | 502.135(B) | In Class II, Division 2 locations, all utilization equipment shall comply with 502.135(B)(1) through (B)(4). [502.135(B)](https://2023.antflix.net#502.135(B)) | https://2023.antflix.net#502.135(B) |
Chaptewr 5 Special Occupancies | 502.135(B)(1) | Electrically heated utilization equipment shall be identified for the location. Exception: Metal-enclosed radiant heating panel equipment shall be permitted to be dusttight and marked in accordance with 500.8(C). [502.135(B)(1)](https://2023.antflix.net#502.135(B)(1)) | https://2023.antflix.net#502.135(B)(1) |
Chaptewr 5 Special Occupancies | 502.135(B)(2) | Motors of motor-driven utilization equipment shall comply with 502.125(B). [502.135(B)(2)](https://2023.antflix.net#502.135(B)(2)) | https://2023.antflix.net#502.135(B)(2) |
Chaptewr 5 Special Occupancies | 502.135(B)(3) | Enclosures for switches, circuit breakers, and fuses shall comply with 502.115(B). [502.135(B)(3)](https://2023.antflix.net#502.135(B)(3)) | https://2023.antflix.net#502.135(B)(3) |
Chaptewr 5 Special Occupancies | 502.135(B)(4) | Transformers, solenoids, impedance coils, and resistors shall comply with 502.120(B). [502.135(B)(4)](https://2023.antflix.net#502.135(B)(4)) | https://2023.antflix.net#502.135(B)(4) |
Chaptewr 5 Special Occupancies | 502.140(A) | Flexible cords used in Class II locations shall be permitted as follows: For connection between portable lighting equipment or other portable utilization equipment and the fixed portion of its supply circuit. The flexible cord shall be attached to the utilization equipment with a cord connector listed for the protectio... | https://2023.antflix.net#502.140(A) |
Chaptewr 5 Special Occupancies | 502.140(B) | Where flexible cords are used, the cords shall comply with all of the following: Be of a type listed for extra-hard usage.Exception to (1): Flexible cord listed for hard usage as permitted by 502.130(A)(3) and (B)(4).Contain, in addition to the conductors of the circuit, an equipment grounding conductor complying with ... | https://2023.antflix.net#502.140(B) |
Chaptewr 5 Special Occupancies | 502.145 | Receptacles and attachment plugs shall be identified for the location. [502.145](https://2023.antflix.net#502.145) | https://2023.antflix.net#502.145 |
Chaptewr 5 Special Occupancies | 502.145(A)(1) | In Class II, Division 1 locations, receptacles shall be part of the premises wiring. [502.145(A)(1)](https://2023.antflix.net#502.145(A)(1)) | https://2023.antflix.net#502.145(A)(1) |
Chaptewr 5 Special Occupancies | 502.145(A)(2) | Attachment plugs shall be of the type that provides for connection to the equipment grounding conductor of the flexible cord. [502.145(A)(2)](https://2023.antflix.net#502.145(A)(2)) | https://2023.antflix.net#502.145(A)(2) |
Chaptewr 5 Special Occupancies | 502.145(B)(1) | In Class II, Division 2 locations, receptacles shall be part of the premises wiring. [502.145(B)(1)](https://2023.antflix.net#502.145(B)(1)) | https://2023.antflix.net#502.145(B)(1) |
Chaptewr 5 Special Occupancies | 502.145(B)(2) | Attachment plugs shall be of the type that provides for connection to the equipment grounding conductor of the flexible cord. [502.145(B)(2)](https://2023.antflix.net#502.145(B)(2)) | https://2023.antflix.net#502.145(B)(2) |
Chaptewr 5 Special Occupancies | 502.150(A) | In Class II, Division 1 locations, signaling, alarm, remote-control, and communications systems; and meters, instruments, and relays shall comply with 502.150(A)(1) through (A)(3). [502.150(A)](https://2023.antflix.net#502.150(A)) | https://2023.antflix.net#502.150(A) |
Chaptewr 5 Special Occupancies | 502.150(A)(1) | Enclosures containing contacts shall comply with the requirements of 502.150(A)(1)(a) or (A)(1)(b). Switches, circuit breakers, relays, contactors, fuses, and current-breaking contacts for bells, horns, howlers, sirens, and other devices in which sparks or arcs might be produced shall be provided with enclosures identi... | https://2023.antflix.net#502.150(A)(1) |
Chaptewr 5 Special Occupancies | 502.150(A)(2) | Enclosures containing resistors shall comply with the requirements of 502.150(A)(2)(a) or (A)(2)(b). Resistors, transformers, choke coils, rectifiers, thermionic tubes, and other heat-generating equipment shall be provided with enclosures identified for the location.Where resistors or similar equipment are immersed in ... | https://2023.antflix.net#502.150(A)(2) |
Chaptewr 5 Special Occupancies | 502.150(A)(3) | Motors, generators, and other rotating electrical machinery shall comply with 502.125(A). [502.150(A)(3)](https://2023.antflix.net#502.150(A)(3)) | https://2023.antflix.net#502.150(A)(3) |
Chaptewr 5 Special Occupancies | 502.150(B) | In Class II, Division 2 locations, signaling, alarm, remote-control, and communications systems; and meters, instruments, and relays shall comply with 502.150(B)(1) through (B)(4). [502.150(B)](https://2023.antflix.net#502.150(B)) | https://2023.antflix.net#502.150(B) |
Chaptewr 5 Special Occupancies | 502.150(B)(1) | Enclosures for contacts shall comply with the requirements of 502.150(B)(1)(a) or (B)(1)(b). Contacts shall comply with the requirements of 502.150(A)(1) or be installed in enclosures that are dusttight or otherwise identified for the location.Enclosures in nonincendive circuits shall be permitted to be of the general-... | https://2023.antflix.net#502.150(B)(1) |
Chaptewr 5 Special Occupancies | 502.150(B)(2) | The windings and terminal connections of transformers, choke coils, and similar equipment shall comply with 502.120(B)(2). [502.150(B)(2)](https://2023.antflix.net#502.150(B)(2)) | https://2023.antflix.net#502.150(B)(2) |
Chaptewr 5 Special Occupancies | 502.150(B)(3) | Resistors, resistance devices, thermionic tubes, rectifiers, and similar equipment shall comply with 502.120(B)(3). [502.150(B)(3)](https://2023.antflix.net#502.150(B)(3)) | https://2023.antflix.net#502.150(B)(3) |
Chaptewr 5 Special Occupancies | 502.150(B)(4) | Motors, generators, and other rotating electrical machinery shall comply with 502.125(B). [502.150(B)(4)](https://2023.antflix.net#502.150(B)(4)) | https://2023.antflix.net#502.150(B)(4) |
Chaptewr 5 Special Occupancies | 502.150(B)(5) | To facilitate replacements, process control instruments shall be permitted to be connected through flexible cord, attachment plug, and receptacle if all of the following conditions apply; Attachment plug and receptacle are listed for use in Class II, Division 2 locations, and listed for use with flexible cords.Exceptio... | https://2023.antflix.net#502.150(B)(5) |
Chaptewr 5 Special Occupancies | 503.1 | This article covers the requirements for electrical and electronic equipment and wiring for all voltages in Class III, Division 1 and Division 2 locations where fire or explosion hazards might exist due to nonmetal combustible fibers/flyings or ignitible fibers/flyings. [503.1](https://2023.antflix.net#503.1) | https://2023.antflix.net#503.1 |
Chaptewr 5 Special Occupancies | 503.5 | Equipment installed in Class III locations shall be able to function at full rating without developing surface temperatures high enough to cause excessive dehydration or gradual carbonization of accumulated fibers/flyings. Informational Note No. 1: See NFPA 505, Fire Safety Standard for Powered Industrial Trucks Includ... | https://2023.antflix.net#503.5 |
Chaptewr 5 Special Occupancies | 503.6 | Equipment listed and marked in accordance with 506.9(C)(2) for Zone 20 locations and with a temperature marking in accordance with 500.8(D)(3) shall be permitted in Class III, Division 1 locations. Equipment listed and marked in accordance with 506.9(C)(2) for Zone 20, Zone 21, or Zone 22 locations and with a temperatu... | https://2023.antflix.net#503.6 |
Chaptewr 5 Special Occupancies | 503.10 | Wiring methods shall comply with 503.10(A) or (B). Informational Note: See Article 100 for the definition of restricted industrial establishment [as applied to hazardous (classified) locations]. [503.10](https://2023.antflix.net#503.10) | https://2023.antflix.net#503.10 |
Chaptewr 5 Special Occupancies | 503.10(A)(1) | In Class III, Division 1 locations, the following wiring methods shall be permitted: Rigid metal conduit (RMC), PVC conduit, RTRC conduit, intermediate metal conduit (IMC), electrical metallic tubing (EMT), dusttight wireways, or Type MC or Type MI cable with listed termination fittings.Type PLTC cable or Type PLTC-ER ... | https://2023.antflix.net#503.10(A)(1) |
Chaptewr 5 Special Occupancies | 503.10(A)(2) | All boxes and fittings shall be dust-tight. [503.10(A)(2)](https://2023.antflix.net#503.10(A)(2)) | https://2023.antflix.net#503.10(A)(2) |
Chaptewr 5 Special Occupancies | 503.10(A)(3) | Where flexible connections are necessary, one or more of the following shall be permitted: Dusttight flexible connectorsLiquidtight flexible metal conduit (LFMC) with listed fittingsLiquidtight flexible nonmetallic conduit (LFNC) with listed fittings and bonded in accordance with 503.30(B)Interlocked armor Type MC cabl... | https://2023.antflix.net#503.10(A)(3) |
Chaptewr 5 Special Occupancies | 503.10(A)(4) | Nonincendive field wiring shall be permitted using any of the wiring methods permitted for unclassified locations. Nonincendive field wiring systems shall be installed in accordance with the control drawing(s). Simple apparatus, not shown on the control drawing, shall be permitted in a nonincendive field wiring circuit... | https://2023.antflix.net#503.10(A)(4) |
Chaptewr 5 Special Occupancies | 503.10(B) | Wiring methods in Class III. Division 2 locations shall be in accordance with the following: The wiring shall comply with 503.10(A).In sections, compartments, or areas that do not contain machinery and are used solely for storage, open wiring on insulators shall be permitted where installed in accordance with Part II o... | https://2023.antflix.net#503.10(B) |
Chaptewr 5 Special Occupancies | 503.25 | There shall be no uninsulated exposed parts, such as electrical conductors, buses, terminals, or components, that operate at more than 30 volts (15 volts in wet locations). These parts shall additionally be protected by a protection technique according to 500.7(E), (F), or (G) that is suitable for the location. Excepti... | https://2023.antflix.net#503.25 |
Chaptewr 5 Special Occupancies | 503.30 | Regardless of the voltage of the electrical system, wiring systems and equipment shall comply with 503.30(A) and (B). [503.30](https://2023.antflix.net#503.30) | https://2023.antflix.net#503.30 |
Chaptewr 5 Special Occupancies | 503.30(A) | Wiring systems and equipment shall be grounded in accordance with Part I and Part VI of Article 250, as applicable. [503.30(A)](https://2023.antflix.net#503.30(A)) | https://2023.antflix.net#503.30(A) |
Chaptewr 5 Special Occupancies | 503.30(B) | Bonding shall comply with Part I and Part V of Article 250, as applicable, and 503.30(B)(1) and (B)(2). [503.30(B)](https://2023.antflix.net#503.30(B)) | https://2023.antflix.net#503.30(B) |
Chaptewr 5 Special Occupancies | 503.30(B)(1) | Bonding shall comply with 503.30(B)(1)(a) and (B)(2)(b). The locknut-bushing and double-locknut types of contacts shall not be depended on for bonding purposes, but bonding jumpers with identified fittings or other approved means of bonding shall be used. These bonding means shall apply to all metal raceways, fittings,... | https://2023.antflix.net#503.30(B)(1) |
Chaptewr 5 Special Occupancies | 503.30(B)(2) | Liquidtight flexible metal conduit shall comply with 503.30(B)(2)(a) and (B)(2)(b). Liquidtight flexible metal conduit shall include an equipment bonding jumper of the wire type in accordance with 250.102.In Class III locations, the bonding jumper shall not be required where all of the following conditions are met:List... | https://2023.antflix.net#503.30(B)(2) |
Chaptewr 5 Special Occupancies | 503.100 | Transformers and capacitors shall comply with 502.100(B). [503.100](https://2023.antflix.net#503.100) | https://2023.antflix.net#503.100 |
Chaptewr 5 Special Occupancies | 503.115 | Switches, circuit breakers, motor controllers, and fuses, including pushbuttons, relays, and similar devices, shall be provided with dusttight enclosures. [503.115](https://2023.antflix.net#503.115) | https://2023.antflix.net#503.115 |
Chaptewr 5 Special Occupancies | 503.120 | Transformers, impedance coils, and resistors used as, or in conjunction with, control equipment for motors, generators, and appliances shall be provided with dusttight enclosures complying with the temperature limitations in 503.5. [503.120](https://2023.antflix.net#503.120) | https://2023.antflix.net#503.120 |
Chaptewr 5 Special Occupancies | 503.125 | In Class III, Division 1 and Division 2 locations, motors, generators, and other rotating machinery shall be totally enclosed nonventilated, totally enclosed pipe ventilated, or totally enclosed fan cooled. Exception: In locations where, in the judgment of the authority having jurisdiction, only moderate accumulations ... | https://2023.antflix.net#503.125 |
Chaptewr 5 Special Occupancies | 503.128 | Ventilating pipes for motors, generators, or other rotating electrical machinery, or for enclosures for electric equipment, shall be of metal not less than 0.53 mm (0.021 in.) in thickness, or of equally substantial noncombustible material, and shall comply with the following:Lead directly to a source of clean air outs... | https://2023.antflix.net#503.128 |
Chaptewr 5 Special Occupancies | 503.130(A) | Luminaires for fixed lighting shall provide enclosures for lamps and lampholders that are designed to minimize entrance of fibers/flyings and to prevent the escape of sparks, burning material, or hot metal. Each luminaire shall be clearly marked to show the maximum wattage of the lamps that shall be permitted without e... | https://2023.antflix.net#503.130(A) |
Chaptewr 5 Special Occupancies | 503.130(B) | A luminaire that may be exposed to physical damage shall be protected by a suitable guard. [503.130(B)](https://2023.antflix.net#503.130(B)) | https://2023.antflix.net#503.130(B) |
Chaptewr 5 Special Occupancies | 503.130(C) | Pendant luminaires shall be suspended by stems of threaded rigid metal conduit, threaded intermediate metal conduit, threaded metal tubing of equivalent thickness, or by chains with approved fittings. For stems longer than 300 mm (12 in.), permanent and effective bracing against lateral displacement shall be provided a... | https://2023.antflix.net#503.130(C) |
Chaptewr 5 Special Occupancies | 503.130(D) | Portable lighting equipment shall be equipped with handles and protected with substantial guards. Lampholders shall be of the unswitched type with no provision for receiving attachment plugs. There shall be no exposed current-carrying metal parts, and all exposed non—current-carrying metal parts shall be grounded. In a... | https://2023.antflix.net#503.130(D) |
Chaptewr 5 Special Occupancies | 503.135(A) | Electrically heated utilization equipment shall be identified for Class III locations. [503.135(A)](https://2023.antflix.net#503.135(A)) | https://2023.antflix.net#503.135(A) |
Chaptewr 5 Special Occupancies | 503.135(B) | Motors of motor-driven utilization equipment shall comply with 503.125. [503.135(B)](https://2023.antflix.net#503.135(B)) | https://2023.antflix.net#503.135(B) |
Chaptewr 5 Special Occupancies | 503.135(C) | Switches, circuit breakers, motor controllers, and fuses shall comply with 503.115. [503.135(C)](https://2023.antflix.net#503.135(C)) | https://2023.antflix.net#503.135(C) |
Chaptewr 5 Special Occupancies | 503.140 | Flexible cords shall comply with the following: Be of a type listed for extra-hard usageContain, in addition to the conductors of the circuit, an equipment grounding conductor complying with 400.23Be supported by clamps or other suitable means in such a manner that there will be no tension on the terminal connectionsBe... | https://2023.antflix.net#503.140 |
Chaptewr 5 Special Occupancies | 503.145 | Receptacles and attachment plugs shall be of the grounding type, shall be designed to minimize the accumulation or the entry of fibers/flyings, and shall prevent the escape of sparks or molten particles. Exception: In locations where, in the judgment of the authority having jurisdiction, only moderate accumulations of ... | https://2023.antflix.net#503.145 |
Chaptewr 5 Special Occupancies | 503.150 | Signaling, alarm, remote-control, and local loudspeaker intercommunications systems shall comply with the requirements of this article regarding wiring methods, switches, transformers, resistors, motors, luminaires, and related components. [503.150](https://2023.antflix.net#503.150) | https://2023.antflix.net#503.150 |
Chaptewr 5 Special Occupancies | 503.155 | Where installed for operation over combustible fibers or accumulations of flyings, traveling cranes and hoists for material handling, traveling cleaners for textile machinery, and similar equipment shall comply with 503.155(A) through (D). [503.155](https://2023.antflix.net#503.155) | https://2023.antflix.net#503.155 |
Chaptewr 5 Special Occupancies | 503.155(A) | The power supply to contact conductors shall be electrically isolated from all other systems, ungrounded, and shall be equipped with an acceptable ground detector that gives an alarm and automatically de-energizes the contact conductors in case of a fault to ground or gives a visual and audible alarm as long as power i... | https://2023.antflix.net#503.155(A) |
Chaptewr 5 Special Occupancies | 503.155(B) | Contact conductors shall be located or guarded so as to be inaccessible to other than authorized persons and shall be protected against accidental contact with foreign objects. [503.155(B)](https://2023.antflix.net#503.155(B)) | https://2023.antflix.net#503.155(B) |
Chaptewr 5 Special Occupancies | 503.155(C) | Current collectors shall be arranged or guarded so as to confine normal sparking and prevent escape of sparks or hot particles. To reduce sparking, two or more separate surfaces of contact shall be provided for each contact conductor. Reliable means shall be provided to keep contact conductors and current collectors fr... | https://2023.antflix.net#503.155(C) |
Chaptewr 5 Special Occupancies | 503.155(D) | Control equipment shall comply with 503.115 and 503.120. [503.155(D)](https://2023.antflix.net#503.155(D)) | https://2023.antflix.net#503.155(D) |
Chaptewr 5 Special Occupancies | 503.160 | Storage battery charging equipment shall be located in separate rooms built or lined with substantial noncombustible materials. The rooms shall be constructed to prevent the entrance of ignitible amounts of flyings or lint and shall be well ventilated. [503.160](https://2023.antflix.net#503.160) | https://2023.antflix.net#503.160 |
Chaptewr 5 Special Occupancies | 504.1 | This article covers the installation of intrinsically safe (I.S.) apparatus, wiring, and systems for hazardous (classified) locations. Informational Note: See ANSI/ISA RP 12.06.01, Recommended Practice for Wiring Methods for Hazardous (Classified) locations Instrumentation - Part 1: Intrinsic Safely, for additional inf... | https://2023.antflix.net#504.1 |
Chaptewr 5 Special Occupancies | 504.3 | Except as modified by this article, all applicable articles of this Code shall apply. [504.3](https://2023.antflix.net#504.3) | https://2023.antflix.net#504.3 |
Chaptewr 5 Special Occupancies | 504.4 | All intrinsically safe apparatus and associated apparatus shall be listed. Exception: Simple apparatus, as described on the control drawing, shall not be required to be listed. [504.4](https://2023.antflix.net#504.4) | https://2023.antflix.net#504.4 |
Chaptewr 5 Special Occupancies | 504.10(A) | Intrinsically safe apparatus, associated apparatus, and other equipment shall be installed in accordance with the control drawing(s). A simple apparatus, whether or not shown on the control drawing(s), shall be permitted to be installed provided the simple apparatus does not interconnect intrinsically safe circuits. In... | https://2023.antflix.net#504.10(A) |
Chaptewr 5 Special Occupancies | 504.10(B) | Intrinsically safe apparatus shall be permitted to be installed in any hazardous (classified) location for which it has been identified. Associated apparatus shall be permitted to be installed in any hazardous (classified) location for which it has been identified. Simple apparatus shall be permitted to be installed in... | https://2023.antflix.net#504.10(B) |
Chaptewr 5 Special Occupancies | 504.10(C) | General-purpose enclosures shall be permitted for intrinsically safe apparatus and associated apparatus unless otherwise specified in the manufacturer's documentation. [504.10(C)](https://2023.antflix.net#504.10(C)) | https://2023.antflix.net#504.10(C) |
Chaptewr 5 Special Occupancies | 504.10(D) | Simple apparatus shall be permitted to be installed in any hazardous (classified) location in which the maximum surface temperature of the simple apparatus does not exceed the ignition temperature of the flammable gases or vapors, flammable liquids, combustible dusts, or ignitible fibers/flyings present. The maximum su... | https://2023.antflix.net#504.10(D) |
Chaptewr 5 Special Occupancies | 504.20 | Any of the wiring methods suitable for unclassified locations, including those covered by Chapter 7 and Chapter 8, shall be permitted for installing intrinsically safe apparatus. Sealing shall be as provided in 504.70, and separation shall be as provided in 504.30. [504.20](https://2023.antflix.net#504.20) | https://2023.antflix.net#504.20 |
Chaptewr 5 Special Occupancies | 504.30(A)(1) | Conductors of intrinsically safe circuits shall not be placed in any raceway, cable tray, or cable with conductors of any nonintrinsically safe circuit, unless they meet the requirements of one of the following methods: Separated from conductors of nonintrinsically safe circuits in accordance with one of the following:... | https://2023.antflix.net#504.30(A)(1) |
Chaptewr 5 Special Occupancies | 504.30(A)(2) | Conductors of intrinsically safe circuits shall be secured so that any conductor that might come loose from a terminal is unlikely to come into contact with another terminal. The conductors shall be separated from conductors of nonintrinsically safe circuits by one of the following methods: Separation by at least 50 mm... | https://2023.antflix.net#504.30(A)(2) |
Chaptewr 5 Special Occupancies | 504.30(A)(3) | Conductors and cables of intrinsically safe circuits run in other than raceway or cable tray systems shall be separated by at least 50 mm (2 in.) and secured from conductors and cables of any nonintrinsically safe circuits unless one of the following applies: All of the intrinsically safe circuit conductors are in Type... | https://2023.antflix.net#504.30(A)(3) |
Chaptewr 5 Special Occupancies | 504.30(B) | The clearance between two terminals for connection of field wiring of different intrinsically safe circuits shall be at least 6 mm (0.25 in.), unless this clearance is permitted to be reduced by the control drawing. Different intrinsically safe circuits shall be separated from each other by one of the following means: ... | https://2023.antflix.net#504.30(B) |
Chaptewr 5 Special Occupancies | 504.30(C) | The clearance between the uninsulated parts of field wiring conductors connected to terminals and grounded metal or other conducting parts shall be at least 3 mm (0.125 in.). [504.30(C)](https://2023.antflix.net#504.30(C)) | https://2023.antflix.net#504.30(C) |
Chaptewr 5 Special Occupancies | 504.50(A) | Intrinsically safe apparatus, enclosures, and raceways, if of metal, shall be connected to the equipment grounding conductor. Informational Note: See ANSI/ISA RP 12.06.01, Recommended Practice for Wiring Methods for Hazardous (Classified) Locations Instrumentation - Part 1: Intrinsic Safety. In addition to an equipment... | https://2023.antflix.net#504.50(A) |
Chaptewr 5 Special Occupancies | 504.50(B) | Associated apparatus and cable shields shall be grounded in accordance with the required control drawing. See 504.10(A). Informational Note: See ANSI/ISA RP 12.06.01, Recommended Practice for Wiring Methods for Hazardous (Classified) Locations Instrumentation - Part 1: Intrinsic Safety. In addition to an equipment grou... | https://2023.antflix.net#504.50(B) |
Chaptewr 5 Special Occupancies | 504.50(C) | Where connection to a grounding electrode is required, the grounding electrode shall be as specified in 250.52(A)(1), (A)(2), (A)(3), and (A)(4) and shall comply with 250.30(A)(4). Sections 250.52(A)(5), (A)(7), and (A)(8) shall not be used if any of the electrodes specified in 250.52(A)(1), (A)(2), (A)(3), or (A)(4) a... | https://2023.antflix.net#504.50(C) |
Chaptewr 5 Special Occupancies | 504.60(A) | Intrinsically safe apparatus, if of metal, shall be bonded in the hazardous (classified) location in accordance with 501.30(B), 502.30(B), 503.30(B), 505.30(B), or 506.30(B), as applicable. [504.60(A)](https://2023.antflix.net#504.60(A)) | https://2023.antflix.net#504.60(A) |
Chaptewr 5 Special Occupancies | 504.60(B) | Where metal raceways are used for intrinsically safe system wiring, bonding at all ends of the race-wav, regardless of the location, shall be in accordance with 501.30(B), 502.30(B), 503.30(B), 505.30(B), or 506.30(B), as applicable. [504.60(B)](https://2023.antflix.net#504.60(B)) | https://2023.antflix.net#504.60(B) |
Chaptewr 5 Special Occupancies | 504.70 | Conduits and cables that are required to be sealed by 501.15, 502.15, 505.16, and 506.16 shall be sealed to minimize the passage of gases, vapors, or dusts. Such seals shall not be required to be explosionproof or flameproof but shall be identified for the purpose of minimizing passage of gases, vapors, or dusts under ... | https://2023.antflix.net#504.70 |
Chaptewr 5 Special Occupancies | 504.80 | Labels required by this section shall be suitable for the environment where they are installed, with consideration given to exposure to chemicals and sunlight. [504.80](https://2023.antflix.net#504.80) | https://2023.antflix.net#504.80 |
Chaptewr 5 Special Occupancies | 504.80(A) | Intrinsically safe circuits shall be identified at terminal and junction locations in a manner that is intended to prevent unintentional interference with the circuits during testing and servicing. [504.80(A)](https://2023.antflix.net#504.80(A)) | https://2023.antflix.net#504.80(A) |
Chaptewr 5 Special Occupancies | 504.80(B) | Raceways, cable trays, and other wiring methods for intrinsically safe system wiring shall be identified with permanently affixed labels with the wording "Intrinsic Safety Wiring" or equivalent. The labels shall be located so as to be visible after installation and placed so that they may be readily traced through the ... | https://2023.antflix.net#504.80(B) |
Chaptewr 5 Special Occupancies | 504.80(C) | Color coding shall be permitted to identify intrinsically safe conductors where they are colored light blue and where no other conductors colored light blue are used. Likewise, color coding shall be permitted to identify raceways, cable trays, and junction boxes where they are colored light blue and contain only intrin... | https://2023.antflix.net#504.80(C) |
Chaptewr 5 Special Occupancies | 505.1(A) | This article covers the requirements for the zone classification system as an alternative to the division classification system covered in 500.1 for electrical and electronic equipment and wiring for all voltages where fire or explosion hazards might exist due to flammable gases, vapors, or liquids for the following: Z... | https://2023.antflix.net#505.1(A) |
Chaptewr 5 Special Occupancies | 505.1(B) | This article does not cover electrical and electronic equipment and wiring in the following: Class I, Class II, or Class III, Division 1 or Division 2 hazardous (classified) locationsZone 20, Zone 21, or Zone 22 hazardous (classified) locationsLocations subject to the unique risk and explosion hazards associated with e... | https://2023.antflix.net#505.1(B) |
Chaptewr 5 Special Occupancies | 505.4 | Areas designated as hazardous (classified) locations or as unclassified shall be documented on an area classification drawing and other associated documentation. This documentation shall be made available to the AHJ and those authorized to design, install, inspect, maintain, or operate electrical equipment at the locat... | https://2023.antflix.net#505.4 |
Chaptewr 5 Special Occupancies | 505.5(A)(1) | Locations shall be classified depending on the properties of the flammable gases, flammable liquid—produced vapors, combustible liquid—produced vapors, combustible dusts, or fibers/flyings that could be present and the likelihood that a flammable or combustible concentration or quantity is present. Each room, section, ... | https://2023.antflix.net#505.5(A)(1) |
Chaptewr 5 Special Occupancies | 505.5(A)(2) | Refrigerant machinery rooms that contain ammonia refrigeration systems and are equipped with adequate mechanical ventilation that operates continuously or is initiated by a detection system at a concentration not exceeding 150 ppm shall be permitted to be classified as "unclassified" locations. Informational Note: See ... | https://2023.antflix.net#505.5(A)(2) |
Chaptewr 5 Special Occupancies | 505.5(B) | Zone 0, 1, and 2 locations are those in which flammable gases or vapors are or may be present in the air in quantities sufficient to produce explosive or ignitible mixtures. Zone 0, 1, and 2 locations shall include those specified in 505.5(B)(1), (B)(2), and (B)(3). [505.5(B)](https://2023.antflix.net#505.5(B)) | https://2023.antflix.net#505.5(B) |
Chaptewr 5 Special Occupancies | 505.5(B)(1) | A Zone 0 location is a location in which one of the following conditions exists: Ignitible concentrations of flammable gases or vapors are present continuouslyIgnitible concentrations of flammable gases or vapors are present for long periods of timeInformational Note No. 1: See ANSI/API RP 505, Recommended Practice for... | https://2023.antflix.net#505.5(B)(1) |
Chaptewr 5 Special Occupancies | 505.5(B)(2) | A Zone 1 location is a location In which ignitible concentrations of flammable gases or vapors are likely to exist under normal operating conditions; orIn which ignitible concentrations of flammable gases or vapors may exist frequently because of repair or maintenance operations or because of leakage; orIn which equipm... | https://2023.antflix.net#505.5(B)(2) |
Chaptewr 5 Special Occupancies | 505.5(B)(3) | A Zone 2 location is a location In which ignitible concentrations of flammable gases or vapors are not likely to occur in normal operation and, if they do occur, will exist only for a short period; orIn which volatile flammable liquids, flammable gases, or flammable vapors are handled, processed, or used but in which t... | https://2023.antflix.net#505.5(B)(3) |
Chaptewr 5 Special Occupancies | 505.6 | For purposes of testing, approval, and area classification, various air mixtures (not oxygen enriched) shall be grouped as required in 505.6(A), (B), and (C). Informational Note No. 1: See 90.2(D). This Code does not apply to installations underground in mines. Group I is intended for use in describing atmospheres that... | https://2023.antflix.net#505.6 |
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