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To ensure their safe operation, wire harnesses used in ATEX Zone 2 hazardous regions must adhere to specific criteria. These requirements include:
Electrical resistance trace heating is covered in EN 60079-14, Electrical apparatus for explosive gas atmospheres, Part 14. This standard outlines the specifications for electrical resistance trace heating systems and their parts, including wire harnesses, for use in explosive gas atmospheres. These criteria include design, building, testing, and labelling.
EN 60079-31: Construction and testing of type "n" protection electrical equipment. Electrical apparatus for explosive gas atmospheres. The design, manufacture, testing, and marking of electrical equipment—including wire harnesses—intended for use in explosive gas atmospheres and protected by the "n" type of protection are all covered by this standard.
EN 60079-32: Construction and testing of type of protection "nR" electrical equipment. Electrical apparatus for explosive gas atmospheres. This standard addresses how electrical equipment, including wire harnesses, that is intended for use in explosive gas atmospheres and is protected by the "nR" type of protection is designed, built, tested, and marked.
EN 60079-33: Construction and testing of type of protection "nA" electrical equipment. Electrical apparatus for explosive gas atmospheres. This standard addresses how electrical equipment, including wire harnesses, that is intended for use in explosive gas atmospheres and is protected by the "nA" type of protection is designed, built, tested, and marked.
Wire harnesses used in ATEX Zone 2 hazardous environments must additionally abide by any other applicable national or sector-specific rules and regulations.
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