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Chaptewr 5 Special Occupancies | 505.6(A) | Atmospheres containing acetylene, hydrogen, or flammable gas, flammable liquid—produced vapor, or combustible liquid—produced vapor mixed with air that may burn or explode, having either a maximum experimental safe gap (MESG) value less than or equal to 0.50 mm or minimum igniting current (MIC) ratio less than or equal... | https://2023.antflix.net#505.6(A) |
Chaptewr 5 Special Occupancies | 505.6(B) | Atmospheres containing acetaldehyde, ethylene, or flammable gas, flammable liquid—produced vapor, or combustible liquid—produced vapor mixed with air that may burn or explode, having either maximum experimental safe gap (MESG) values greater than 0.50 mm and less than or equal to 0.90 mm or minimum igniting current rat... | https://2023.antflix.net#505.6(B) |
Chaptewr 5 Special Occupancies | 505.6(C) | Atmospheres containing acetone, ammonia, ethyl alcohol, gasoline, methane, propane, or flammable gas, flammable liquid—produced vapor, or combustible liquid-produced vapor mixed with air that may burn or explode, having either a maximum experimental safe gap (MESG) value greater than 0.90 mm or minimum igniting current... | https://2023.antflix.net#505.6(C) |
Chaptewr 5 Special Occupancies | 505.7 | This article requires equipment construction and installation that ensures safe performance under conditions of proper use and maintenance. Informational Note No. 1: It is important that inspection authorities and users exercise more than ordinary care regarding the installation and maintenance of electrical equipment ... | https://2023.antflix.net#505.7 |
Chaptewr 5 Special Occupancies | 505.7(A) | Classification of areas, engineering and design, selection of equipment and wiring methods, installation, and inspection shall be performed by qualified persons. [505.7(A)](https://2023.antflix.net#505.7(A)) | https://2023.antflix.net#505.7(A) |
Chaptewr 5 Special Occupancies | 505.7(B) | In instances of areas within the same facility classified separately, Zone 2 locations shall be permitted to abut, but not overlap, Class I, Division 2 locations. Zone 0 or Zone 1 locations shall not abut Class I, Division 1 or Division 2 locations. [505.7(B)](https://2023.antflix.net#505.7(B)) | https://2023.antflix.net#505.7(B) |
Chaptewr 5 Special Occupancies | 505.7(C) | A Class I, Division 1 or Division 2 location shall be permitted to be reclassified as a Zone 0, Zone 1, or Zone 2 location, provided all of the space that is classified because of a single flammable gas or vapor source is reclassified under the requirements of this article. [505.7(C)](https://2023.antflix.net#505.7(C)) | https://2023.antflix.net#505.7(C) |
Chaptewr 5 Special Occupancies | 505.7(D) | Flameproof equipment with flanged joints shall not be installed such that the flange openings are closer than the distances shown in Table 505.7(D) to any solid obstacle that is not a part of the equipment (such as steelworks, walls, weather guards, mounting brackets, pipes, or other electrical equipment) unless the eq... | https://2023.antflix.net#505.7(D) |
Chaptewr 5 Special Occupancies | 505.7(E) | Where flammable gases, combustible dusts, or fibers/flyings are or may be present at the same time, the simultaneous presence shall be considered during the selection and installation of the electrical equipment and the wiring methods, including the determination of the safe operating temperature of the electrical equi... | https://2023.antflix.net#505.7(E) |
Chaptewr 5 Special Occupancies | 505.7(F) | Unless listed and marked for connection to circuits with higher available fault current, the available fault current for electrical equipment using type of protection "e" for the field wiring connections in Zone 1 locations shall be limited to 10,000 ruts symmetrical amperes to reduce the likelihood of ignition of a fl... | https://2023.antflix.net#505.7(F) |
Chaptewr 5 Special Occupancies | 505.8 | Acceptable protection techniques for electrical and electronic equipment in hazardous (classified) locations shall be as described in 505.8(A) through (Q). Informational Note No. 1: See ANSI/UL 120101, Definitions and Information Pertaining to Electrical Equipment in Hazardous Locations, and ANSI/UL 60079-0, Explosive ... | https://2023.antflix.net#505.8 |
Chaptewr 5 Special Occupancies | 505.8(A) | This protection technique shall be permitted for equipment in Zone 1 or Zone 2 locations. [505.8(A)](https://2023.antflix.net#505.8(A)) | https://2023.antflix.net#505.8(A) |
Chaptewr 5 Special Occupancies | 505.8(B) | This protection technique shall be permitted for equipment in those Zone 1 or Zone 2 locations for which it is identified. [505.8(B)](https://2023.antflix.net#505.8(B)) | https://2023.antflix.net#505.8(B) |
Chaptewr 5 Special Occupancies | 505.8(C) | This protection technique shall be permitted for apparatus and associated apparatus for Zone 0, Zone 1, or Zone 2 locations for which it is listed. [505.8(C)](https://2023.antflix.net#505.8(C)) | https://2023.antflix.net#505.8(C) |
Chaptewr 5 Special Occupancies | 505.8(D) | This protection technique shall be permitted for equipment in Zone 2 locations. Type of protection "n" is further subdivided into nA, nC, and nR. [505.8(D)](https://2023.antflix.net#505.8(D)) | https://2023.antflix.net#505.8(D) |
Chaptewr 5 Special Occupancies | 505.8(E) | This protection technique shall be permitted for equipment in Zone 1 or Zone 2 locations. [505.8(E)](https://2023.antflix.net#505.8(E)) | https://2023.antflix.net#505.8(E) |
Chaptewr 5 Special Occupancies | 505.8(F) | This protection technique shall be permitted for equipment in Zone 1 or Zone 2 locations. [505.8(F)](https://2023.antflix.net#505.8(F)) | https://2023.antflix.net#505.8(F) |
Chaptewr 5 Special Occupancies | 505.8(G) | This protection technique shall be permitted for equipment in Zone 0, Zone 1, or Zone 2 locations for which it is identified. [505.8(G)](https://2023.antflix.net#505.8(G)) | https://2023.antflix.net#505.8(G) |
Chaptewr 5 Special Occupancies | 505.8(H) | This protection technique shall be permitted for equipment in Zone 1 or Zone 2 locations. [505.8(H)](https://2023.antflix.net#505.8(H)) | https://2023.antflix.net#505.8(H) |
Chaptewr 5 Special Occupancies | 505.8(I) | A detection system for flammable gases shall be permitted as a means of protection in restricted industrial establishments. [505.8(I)](https://2023.antflix.net#505.8(I)) | https://2023.antflix.net#505.8(I) |
Chaptewr 5 Special Occupancies | 505.8(I)(1) | Any gas detection system used as a protection technique shall meet all of the requirements in 505.8(I)(1)(a) through (I)(1)(e). The gas detection equipment used shall be listed for Zone 1 and listed for the detection of the specific gas or vapor to be encountered.The gas detection system shall not use portable or trans... | https://2023.antflix.net#505.8(I)(1) |
Chaptewr 5 Special Occupancies | 505.8(I)(2) | A location, enclosed space, or building that is classified as a Zone 1 location due to inadequate ventilation and that is provided with a detection system for flammable gases shall be permitted to use electrical equipment, installation methods, and wiring practices suitable for Zone 2 installations. Sensing a gas conce... | https://2023.antflix.net#505.8(I)(2) |
Chaptewr 5 Special Occupancies | 505.8(I)(3) | Any building or enclosed space that does not contain a source of flammable gas or vapors that is located in, or with an opening into, a Zone 2 hazardous (classified) location that is provided with a detection system for flammable gases shall be permitted to use electrical equipment, installation methods, and wiring pra... | https://2023.antflix.net#505.8(I)(3) |
Chaptewr 5 Special Occupancies | 505.8(I)(4) | Inside the interior of a control panel containing instrumentation or other equipment using or measuring flammable liquids, gases, or vapors and that is provided with a detection system for flammable gases equipment shall be allowed to use electrical equipment, installation methods, and wiring practices suitable for Zon... | https://2023.antflix.net#505.8(I)(4) |
Chaptewr 5 Special Occupancies | 505.8(J) | "60079-30-1". This protection technique shall be permitted for electrical resistance trace heating equipment in Zone 1 or Zone 2 for which it is listed. [505.8(J)](https://2023.antflix.net#505.8(J)) | https://2023.antflix.net#505.8(J) |
Chaptewr 5 Special Occupancies | 505.8(K) | This protection technique shall be permitted for equipment in Zone 0, Zone 1, or Zone 2 locations for which the equipment is identified. [505.8(K)](https://2023.antflix.net#505.8(K)) | https://2023.antflix.net#505.8(K) |
Chaptewr 5 Special Occupancies | 505.8(L) | This protection technique shall be permitted for equipment in Zone 1 or Zone 2 locations for which the equipment is identified. [505.8(L)](https://2023.antflix.net#505.8(L)) | https://2023.antflix.net#505.8(L) |
Chaptewr 5 Special Occupancies | 505.8(M) | This protection technique shall be permitted for equipment in Zone 0, Zone 1, or Zone 2 locations for which the equipment is identified. [505.8(M)](https://2023.antflix.net#505.8(M)) | https://2023.antflix.net#505.8(M) |
Chaptewr 5 Special Occupancies | 505.8(N) | This protection technique shall be permitted for skin effect trace heating equipment in Zone 1 or Zone 2 locations for which it is listed. [505.8(N)](https://2023.antflix.net#505.8(N)) | https://2023.antflix.net#505.8(N) |
Chaptewr 5 Special Occupancies | 505.8(O) | This protection technique shall be permitted for impedance heating of pipelines, and equipment in Zone 2 locations for which it is listed. [505.8(O)](https://2023.antflix.net#505.8(O)) | https://2023.antflix.net#505.8(O) |
Chaptewr 5 Special Occupancies | 505.8(P) | This protection technique shall be permitted for equipment in Zone 1 or Zone 2 locations for which it is identified. [505.8(P)](https://2023.antflix.net#505.8(P)) | https://2023.antflix.net#505.8(P) |
Chaptewr 5 Special Occupancies | 505.8(Q) | This protection technique shall be permitted for equipment in Zone 0, Zone 1, or Zone 2 locations for which it is listed. [505.8(Q)](https://2023.antflix.net#505.8(Q)) | https://2023.antflix.net#505.8(Q) |
Chaptewr 5 Special Occupancies | 505.9(A) | Suitability of identified equipment shall be determined by one of the following: Equipment listing or labelingEvidence of equipment evaluation from a qualified testing laboratory or inspection agency concerned with product evaluationEvidence acceptable to the authority having jurisdiction such as a manufacturer's self-... | https://2023.antflix.net#505.9(A) |
Chaptewr 5 Special Occupancies | 505.9(B) | Equipment that is listed for a Zone 0 location shall be permitted in a Zone 1 or Zone 2 location of the same gas or vapor, provided that it is installed in accordance with the requirements for the marked type of protection. Equipment that is listed for a Zone 1 location shall be permitted in a Zone 2 location of the sa... | https://2023.antflix.net#505.9(B) |
Chaptewr 5 Special Occupancies | 505.9(C) | Equipment shall be marked in accordance with 505.9(C)(1) or (C)(2). [505.9(C)](https://2023.antflix.net#505.9(C)) | https://2023.antflix.net#505.9(C) |
Chaptewr 5 Special Occupancies | 505.9(C)(1) | Equipment identified for Class I, Division 1 or Class I, Division 2 shall, in addition to being marked in accordance with 500.8(C), be permitted to be marked with all of the following: Class I, Zone 1 or Zone 1; Class I, Zone 2 or Zone 2 (as applicable)Applicable gas classification group(s) in accordance with Table 505... | https://2023.antflix.net#505.9(C)(1) |
Chaptewr 5 Special Occupancies | 505.9(C)(2) | Equipment meeting one or more of the protection techniques described in 505.8 shall be marked with all of the following in the order shown: Class I shall be an optional marking. If it is included in the equipment marking, the Class I marking shall precede the zone marking.Zone in accordance with Chapter 9, Table 13.Sym... | https://2023.antflix.net#505.9(C)(2) |
Chaptewr 5 Special Occupancies | 505.9(D) | The temperature marking shall not exceed the autoignition temperature of the specific gas or vapor to be encountered. Informational Note No. 1: See ANSI/UL 60079-26, Explosive Atmospheres - Part 26: Equipment with Equipment Protection Level (EPL) Ga, for more information. Equipment installed outside a Zone 0 location a... | https://2023.antflix.net#505.9(D) |
Chaptewr 5 Special Occupancies | 505.9(E) | The supply connection entry thread form shall be NPT or metric. Conduit and fittings shall be made wrench-tight to prevent sparking when fault current flows through the conduit system, and to ensure the explosionproof or flameproof integrity of the conduit system where applicable. Equipment provided with threaded entri... | https://2023.antflix.net#505.9(E) |
Chaptewr 5 Special Occupancies | 505.9(E)(1) | For equipment provided with threaded entries for NPT threaded conduit or fittings, listed conduit, listed conduit fittings, or listed cable fittings shall be used. All NPT threaded conduit and fittings shall be threaded with a National (American) Standard Pipe Taper (NPT) thread. NPT threaded entries into explosionproo... | https://2023.antflix.net#505.9(E)(1) |
Chaptewr 5 Special Occupancies | 505.9(E)(2) | For equipment with metric threaded entries, listed conduit fittings or listed cable fittings shall be used. Such entries shall be identified as being metric, or listed adapters to permit connection to conduit or NPT threaded fittings shall be provided with the equipment and shall be used for connection to conduit or NP... | https://2023.antflix.net#505.9(E)(2) |
Chaptewr 5 Special Occupancies | 505.9(E)(3) | All unused openings shall be closed with blanking elements or close-up plugs that are listed for the location and will maintain the type of protection. Thread engagement shall comply with 505.9(E)(1) or (E)(2). [505.9(E)(3)](https://2023.antflix.net#505.9(E)(3)) | https://2023.antflix.net#505.9(E)(3) |
Chaptewr 5 Special Occupancies | 505.9(F) | An optical fiber cable, with or without current-carrying conductors (hybrid optical fiber cable), shall be installed to address the associated fire hazard and sealed to address the associated explosion hazard in accordance with 505.15 and 505.16. [505.9(F)](https://2023.antflix.net#505.9(F)) | https://2023.antflix.net#505.9(F) |
Chaptewr 5 Special Occupancies | 505.9(G) | For equipment involving sources of optical radiation (such as laser or LED sources) in the wavelength range from 380 nm to 10 pm, the risk of ignition from optical radiation shall be considered for all electrical parts and circuits that may be exposed to the radiation, both inside and outside the optical equipment. Thi... | https://2023.antflix.net#505.9(G) |
Chaptewr 5 Special Occupancies | 505.15 | Wiring methods shall maintain the integrity of protection techniques and shall comply with 505.15(A) through (C). [505.15](https://2023.antflix.net#505.15) | https://2023.antflix.net#505.15 |
Chaptewr 5 Special Occupancies | 505.15(A) | In Zone 0 locations, equipment protected by intrinsic safety "ia" and equipment protected by encapsulation "ma" shall be connected using intrinsically safe "ia" circuits with wiring methods in accordance with 504.20. [505.15(A)](https://2023.antflix.net#505.15(A)) | https://2023.antflix.net#505.15(A) |
Chaptewr 5 Special Occupancies | 505.15(B)(1) | In Zone 1 locations, the following wiring methods shall be permitted: Informational Note No. 1: See Article 100 for the definition of restricted industrial establishment [as applied to hazardous (classified) locations].All wiring methods permitted by 505.15(A).In restricted industrial establishments where the cable is ... | https://2023.antflix.net#505.15(B)(1) |
Chaptewr 5 Special Occupancies | 505.15(B)(2) | If flexibility is necessary to minimize the transmission of vibration from equipment during operation or to allow for movement after installation during maintenance, one of the following shall be permitted: Flexible fittings listed for the location.Flexible cord in accordance with 505.17(A), terminated with cord connec... | https://2023.antflix.net#505.15(B)(2) |
Chaptewr 5 Special Occupancies | 505.15(C)(1) | In Zone 2 locations, the following wiring methods shall be permitted: Informational Note No. 1: See Article 100 for the definition of restricted industrial establishment [as applied to hazardous (classified) locations].All wiring methods permitted by 505.15(B).Type MCI, Type MV, Type TC, or Type TC-ER cable, including ... | https://2023.antflix.net#505.15(C)(1) |
Chaptewr 5 Special Occupancies | 505.15(C)(2) | Where flexibility is necessary to minimize the transmission of vibration from equipment during operation or to allow for movement after installation during maintenance, one or more of the following wiring methods shall be permitted: Listed flexible metal fittingsFlexible metal conduit with listed fittingsInterlocked ar... | https://2023.antflix.net#505.15(C)(2) |
Chaptewr 5 Special Occupancies | 505.16 | Seals in conduit and cable systems shall comply with 505.16(A) through (E). Sealing compound shall be used in Type MI cable termination fittings to exclude moisture and other fluids from the cable insulation. Informational Note No. 1: See 505.16(C)(2)(c). Seals are provided in conduit and cable systems to minimize the ... | https://2023.antflix.net#505.16 |
Chaptewr 5 Special Occupancies | 505.16(A) | In Zone 0 locations, seals shall be located according to 505.16(A)(1), (A)(2), and (A)(3). [505.16(A)](https://2023.antflix.net#505.16(A)) | https://2023.antflix.net#505.16(A) |
Chaptewr 5 Special Occupancies | 505.16(A)(1) | Seals shall be provided within 3.05 m (10 ft) of where a conduit leaves a Zone 0 location. There shall be no unions, couplings, boxes, or fittings, except listed reducers at the seal, in the conduit run between the seal and the point at which the conduit leaves the location. Exception: A rigid unbroken conduit that pas... | https://2023.antflix.net#505.16(A)(1) |
Chaptewr 5 Special Occupancies | 505.16(A)(2) | Seals shall be provided on cables at the first point of termination after entry into the Zone 0 location. [505.16(A)(2)](https://2023.antflix.net#505.16(A)(2)) | https://2023.antflix.net#505.16(A)(2) |
Chaptewr 5 Special Occupancies | 505.16(A)(3) | Seals shall not be required to be explosionproof or flameproof. [505.16(A)(3)](https://2023.antflix.net#505.16(A)(3)) | https://2023.antflix.net#505.16(A)(3) |
Chaptewr 5 Special Occupancies | 505.16(B) | In Zone 1 locations, seals shall be located in accordance with 505.16(B)(1) through (B)(8). [505.16(B)](https://2023.antflix.net#505.16(B)) | https://2023.antflix.net#505.16(B) |
Chaptewr 5 Special Occupancies | 505.16(B)(1) | Conduit seals shall be provided within 50 mm (2 in.) for each conduit entering enclosures having type of protection "d", "db", "e", or "eb". Exception No. 1: Where the enclosure having type of protection "d" or "db" is marked to indicate that a seal is not required. Exception No. 2: For type of protection "e" or "eb", ... | https://2023.antflix.net#505.16(B)(1) |
Chaptewr 5 Special Occupancies | 505.16(B)(2) | Conduit seals shall be provided for each conduit entering explosionproof equipment according to 505.16(B)(2)(a), (B)(2)(b), and (B)(2)(c). In each conduit entry into an explosionproof enclosure where either of the following conditions apply:The enclosure contains apparatus, such as switches, circuit breakers, fuses, re... | https://2023.antflix.net#505.16(B)(2) |
Chaptewr 5 Special Occupancies | 505.16(B)(3) | Conduit seals shall be provided in each conduit entry into a pressurized enclosure or pressurized room where the conduit is not pressurized as part of the protection system. Conduit seals shall be installed within 450 mm (18 in.) from the pressurized enclosure or pressurized room. Informational Note No. 1: Installing t... | https://2023.antflix.net#505.16(B)(3) |
Chaptewr 5 Special Occupancies | 505.16(B)(4) | Conduit seals shall be provided in each conduit run leaving a Zone 1 location. The sealing fitting shall be permitted on either side of the boundary of such location within 3.05 m (10 ft) of the boundary and shall be designed and installed so as to minimize the amount of gas or vapor within the Zone 1 portion of the co... | https://2023.antflix.net#505.16(B)(4) |
Chaptewr 5 Special Occupancies | 505.16(B)(5) | Conduits containing cables with a gas/vaportight continuous sheath capable of transmitting gases or vapors through the cable core shall be sealed in the Zone 1 location after removing the jacket and any other coverings so that the sealing compound surrounds each individual insulated conductor or optical fiber tube and ... | https://2023.antflix.net#505.16(B)(5) |
Chaptewr 5 Special Occupancies | 505.16(B)(6) | Each multiconductor or optical multifiber cable in conduit shall be considered as a single conductor or single optical fiber tube if the cable is incapable of transmitting gases or vapors through the cable core. These cables shall be sealed in accordance with 505.16(D). [505.16(B)(6)](https://2023.antflix.net#505.16(B)... | https://2023.antflix.net#505.16(B)(6) |
Chaptewr 5 Special Occupancies | 505.16(B)(7) | Cable seals shall be provided for each cable entering flameproof or explosionproof enclosures. The seal shall comply with 505.16(D). [505.16(B)(7)](https://2023.antflix.net#505.16(B)(7)) | https://2023.antflix.net#505.16(B)(7) |
Chaptewr 5 Special Occupancies | 505.16(B)(8) | Cables shall be sealed at the point at which they leave the Zone 1 location. Exception: Where cable is sealed at the termination point. [505.16(B)(8)](https://2023.antflix.net#505.16(B)(8)) | https://2023.antflix.net#505.16(B)(8) |
Chaptewr 5 Special Occupancies | 505.16(C) | In Zone 2 locations, seals shall be installed in accordance with 505.16(C)(1) and (C)(2). [505.16(C)](https://2023.antflix.net#505.16(C)) | https://2023.antflix.net#505.16(C) |
Chaptewr 5 Special Occupancies | 505.16(C)(1) | Conduit seals shall be provided in accordance with 505.16(C)(1)(a) through (C)(1)(f). Flameproof and Explosionproof Enclosures. Conduit seals shall be required for connections to enclosures that are required to be flameproof or explosionproof, in accordance with 505.16(B)(1) and (B)(2). All portions of the conduit run ... | https://2023.antflix.net#505.16(C)(1) |
Chaptewr 5 Special Occupancies | 505.16(C)(2) | Cable seals shall be installed in accordance with 505.16(C)(2)(a) through (C)(2)(c). Explosionproof and Flameproof Enclosures. Cables entering enclosures required to be flameproof or explosionproof shall be sealed at the point of entrance. The seal shall comply with 505.16(D). Multiconductor or optical multifiber cable... | https://2023.antflix.net#505.16(C)(2) |
Chaptewr 5 Special Occupancies | 505.16(D) | Where required, seals in Zones 0, 1, and 2 locations shall comply with 505.16(D)(1) through (D)(5). [505.16(D)](https://2023.antflix.net#505.16(D)) | https://2023.antflix.net#505.16(D) |
Chaptewr 5 Special Occupancies | 505.16(D)(1) | Enclosures for connections or equipment shall be provided with an integral means for sealing, or sealing fittings listed for the location shall be used. Sealing fittings shall be listed for use with one or more specific compounds and shall be accessible. [505.16(D)(1)](https://2023.antflix.net#505.16(D)(1)) | https://2023.antflix.net#505.16(D)(1) |
Chaptewr 5 Special Occupancies | 505.16(D)(2) | The compound shall provide a seal against passage of gas or vapors through the seal fitting, shall not be affected by the surrounding atmosphere or liquids, and shall not have a melting point less than 93°C (200°F). [505.16(D)(2)](https://2023.antflix.net#505.16(D)(2)) | https://2023.antflix.net#505.16(D)(2) |
Chaptewr 5 Special Occupancies | 505.16(D)(3) | In a completed seal, the minimum thickness of the sealing compound shall not be less than the trade size of the sealing fitting and, in no case, less than 16 mm (5/8 in.). Exception: Listed cable sealing fittings shall not be required to have a minimum thickness equal to the trade size of the fitting. [505.16(D)(3)](ht... | https://2023.antflix.net#505.16(D)(3) |
Chaptewr 5 Special Occupancies | 505.16(D)(4) | Splices and taps shall not be made in fittings intended only for sealing with compound, nor shall other fittings in which splices or taps are made be filled with compound. [505.16(D)(4)](https://2023.antflix.net#505.16(D)(4)) | https://2023.antflix.net#505.16(D)(4) |
Chaptewr 5 Special Occupancies | 505.16(D)(5) | The cross-sectional area of the conductors or optical fiber tubes (metallic or nonmetallic) permitted in a seal shall not exceed 25 percent of the cross-sectional area of a rigid metal conduit of the same trade size unless it is specifically listed for a higher percentage of fill. [505.16(D)(5)](https://2023.antflix.ne... | https://2023.antflix.net#505.16(D)(5) |
Chaptewr 5 Special Occupancies | 505.16(E)(1) | Where there is a probability that liquid or other condensed vapor may be trapped within enclosures for control equipment or at any point in the raceway system, approved means shall be provided to prevent accumulation or to permit periodic draining of such liquid or condensed vapor. [505.16(E)(1)](https://2023.antflix.n... | https://2023.antflix.net#505.16(E)(1) |
Chaptewr 5 Special Occupancies | 505.16(E)(2) | Where liquid or condensed vapor may accumulate within motors or generators, joints and conduit systems shall be arranged to minimize entrance of liquid. If means to prevent accumulation or to permit periodic draining are necessary, such means shall be provided at the time of manufacture and shall be considered an integ... | https://2023.antflix.net#505.16(E)(2) |
Chaptewr 5 Special Occupancies | 505.17(A) | A flexible cord shall be permitted for connection between portable lighting equipment or other portable utilization equipment and the fixed portion of their supply circuit. Flexible cord shall also be permitted in restricted industrial establishments for any segment of the circuit where installation of one of the fixed... | https://2023.antflix.net#505.17(A) |
Chaptewr 5 Special Occupancies | 505.17(B) | To facilitate replacements, process control instruments shall be permitted to be connected through flexible cords, attachment plugs, and receptacles, provided that all of the following conditions apply: A switch listed for Zone 2 is provided so that the attachment plug is not depended on to interrupt current, unless th... | https://2023.antflix.net#505.17(B) |
Chaptewr 5 Special Occupancies | 505.18(A) | For type of protection "e," field wiring conductors shall be copper. Every conductor (including spares) that enters Type "e" equipment shall be terminated at a Type "e" terminal. [505.18(A)](https://2023.antflix.net#505.18(A)) | https://2023.antflix.net#505.18(A) |
Chaptewr 5 Special Occupancies | 505.18(B) | Where condensed vapors or liquids may collect on, or come in contact with, the insulation on conductors, such insulation shall be of a type identified for use under such conditions, or the insulation shall be protected by a sheath of lead or by other approved means. [505.18(B)](https://2023.antflix.net#505.18(B)) | https://2023.antflix.net#505.18(B) |
Chaptewr 5 Special Occupancies | 505.19 | 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 type of protection "ia", "ib", or "ic" that is suitable for the location. [505.19](https://2023.antf... | https://2023.antflix.net#505.19 |
Chaptewr 5 Special Occupancies | 505.20(A) | In Zone 0 locations, only equipment specifically listed and marked as suitable for the location shall be permitted. Exception: Intrinsically safe apparatus listed for use in Class I, Division 1 locations for the same gas, or as permitted by 505.9(B)(2), and with a suitable temperature class shall be permitted. [505.20(... | https://2023.antflix.net#505.20(A) |
Chaptewr 5 Special Occupancies | 505.20(B) | In Zone 1 locations, only equipment specifically listed and marked as suitable for the location shall be permitted. Exception No. 1: Equipment identified for use in Class I, Division 1 or listed for use in Zone 0 locations for the same gas, or as permitted by 505.9(B)(2), and with a suitable temperature class shall be ... | https://2023.antflix.net#505.20(B) |
Chaptewr 5 Special Occupancies | 505.20(C) | In Zone 2 locations, only equipment specifically listed and marked as suitable for the location shall be permitted. Exception No. 1: Equipment listed for use in Zone 0 or Zone 1 locations for the same gas, or as permitted by 505.9(B)(2), and with a suitable temperature class shall be permitted. Exception No. 2: Equipme... | https://2023.antflix.net#505.20(C) |
Chaptewr 5 Special Occupancies | 505.20(D) | Equipment marked Group IIC shall be permitted for applications requiring Group IIA or Group IIB equipment. Similarly, equipment marked Group IIB shall be permitted for applications requiring Group IIA equipment. Equipment marked for a specific gas or vapor shall be permitted for applications where the specific gas or v... | https://2023.antflix.net#505.20(D) |
Chaptewr 5 Special Occupancies | 505.20(E) | Electrical equipment installed in hazardous (classified) locations shall be installed in accordance with the instructions (if any) provided by the manufacturer. [505.20(E)](https://2023.antflix.net#505.20(E)) | https://2023.antflix.net#505.20(E) |
Chaptewr 5 Special Occupancies | 505.22 | In Zone 1 locations, increased safety "e" motors and generators of all voltage ratings shall be listed for Zone 1 locations, and shall comply with all of the following: Motors shall be marked with the current ratio, IA/IN, and time, tE.Motors shall have controllers marked with the model or identification number, output... | https://2023.antflix.net#505.22 |
Chaptewr 5 Special Occupancies | 505.26 | Process-connected equipment including, but not limited to, canned pumps, submersible pumps, and flow, pressure, temperature, or analysis measurement instruments shall be sealed with a process seal to prevent the migration of process fluids from the designed containment into the external electrical system. Process-conne... | https://2023.antflix.net#505.26 |
Chaptewr 5 Special Occupancies | 505.30 | Regardless of the voltage of the electrical system, wiring systems and equipment shall comply with 505.30(A) and (B). [505.30](https://2023.antflix.net#505.30) | https://2023.antflix.net#505.30 |
Chaptewr 5 Special Occupancies | 505.30(A) | Wiring systems and equipment shall be grounded in accordance with Part I and Part VI of Article 250, as applicable. [505.30(A)](https://2023.antflix.net#505.30(A)) | https://2023.antflix.net#505.30(A) |
Chaptewr 5 Special Occupancies | 505.30(B) | Wiring systems and equipment shall be bonded in accordance with Part I and Part V of Article 250, as applicable, and 505.30(B)(1) and (B)(2). [505.30(B)](https://2023.antflix.net#505.30(B)) | https://2023.antflix.net#505.30(B) |
Chaptewr 5 Special Occupancies | 505.30(B)(1) | Bonding shall comply with 505.30(B)(1)(a) and (B)(1)(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#505.30(B)(1) |
Chaptewr 5 Special Occupancies | 505.30(B)(2) | Flexible metal conduit and liquidtight flexible metal conduit shall comply with 505.30(B)(2)(a) and (B)(2)(b). Flexible metal conduit and liquidtight flexible metal conduit shall include an equipment bonding jumper of the wire type in accordance with 250.102.In Zone 2 locations, the bonding jumper shall not be required... | https://2023.antflix.net#505.30(B)(2) |
Chaptewr 5 Special Occupancies | 506.1(A) | This article covers the requirements for the zone classification system for electrical and electronic equipment and wiring for all voltages where fire and explosion hazards might exist due to combustible dusts, combustible fibers/flyings, or ignitible fibers/flyings for the following: Zone 20 hazardous (classified) loc... | https://2023.antflix.net#506.1(A) |
Chaptewr 5 Special Occupancies | 506.1(B) | This article does not cover electrical and electronic equipment and wiring of all voltages in the following: Class I, Class II, or Class III, Division 1 or Division 2 hazardous (classified) locations.Zone 0, Zone 1, or Zone 2 hazardous (classified) locations.Locations subject to the unique risk and explosion hazards as... | https://2023.antflix.net#506.1(B) |
Chaptewr 5 Special Occupancies | 506.4 | Areas designated as hazardous (classified) or unclassified locations shall be documented on an area classification drawing and other associated documentation. This documentation shall be made available to the AHJ and to those authorized to design, install, inspect, maintain, or operate electrical equipment. Information... | https://2023.antflix.net#506.4 |
Chaptewr 5 Special Occupancies | 506.5(A) | Locations shall be classified on the basis of the properties of the combustible dust, combustible fibers/flyings, or ignitible fibers/flyings that might be present, and the likelihood that a combustible or ignitible concentration or quantity is present. Each room, section, or area shall be considered individually in de... | https://2023.antflix.net#506.5(A) |
Chaptewr 5 Special Occupancies | 506.5(B) | Zone 20, Zone 21, and Zone 22 locations are those in which combustible dust, combustible fibers/flyings, or ignitible fibers/flyings are or might be present in the air or in layers, in quantities sufficient to produce explosible or ignitible mixtures. Zone 20, Zone 21, and Zone 22 locations shall include those specifie... | https://2023.antflix.net#506.5(B) |
Chaptewr 5 Special Occupancies | 506.5(B)(1) | A Zone 20 location is a location where one of the following apply: Ignitible concentrations of combustible dust, combustible fibers/flyings, or ignitible fibers/flyings are present continuously or for long periods of time.Group IIIC combustible dusts are present in hazardous quantities continuously or for long periods ... | https://2023.antflix.net#506.5(B)(1) |
Chaptewr 5 Special Occupancies | 506.5(B)(2) | A Zone 21 location is a location where one of the following apply: Ignitible concentrations of combustible dust, combustible fibers/flyings, or ignitible fibers/flyings are likely to exist occasionally under normal operating conditions.Ignitible concentrations of combustible dust, combustible fibers/flyings, or ignitib... | https://2023.antflix.net#506.5(B)(2) |
Chaptewr 5 Special Occupancies | 506.5(B)(3) | A Zone 22 location is a location where one of the following apply: Ignitible concentrations of combustible dust, combustible fibers/flyings, or ignitible fibers/flyings are not likely to occur in normal operation and, if they do occur, will only persist for a short period.Combustible dust, combustible fibers/flyings, o... | https://2023.antflix.net#506.5(B)(3) |
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