What are explosion-proof lighting requirements in USA?
Explosion-proof lighting is designed to prevent the ignition of hazardous atmospheres, such as those containing flammable vapors, dust, or fibers.
The requirements for explosion-proof lighting vary depending on the type of hazardous atmosphere and lighting used.
A nationally recognized testing laboratory (NRTL) must generally certify and label explosion-proof lighting. The certification should include the type of hazardous atmosphere and the type of lighting being used.
The lighting must also be designed and constructed to contain any explosion that may occur within the fixture and to prevent the ignition of any hazardous atmosphere that may be present.
In addition, explosion-proof lighting must be installed per the manufacturer’s instructions and connected to a ground fault circuit interrupter (GFCI).
The GFCI must be tested regularly to ensure it is functioning correctly.
Finally, all wiring and connections must be made per the National Electrical Code (NEC) and applicable local codes.