Flameproof type IIB is also called plane explosion-proof, with only one explosion-proof surface, and the effective use space can be rectangular or square;Flameproof type IIC is also called stop explosion-proof or thread explosion-proof, generally with two explosion-proof surfaces, and the effective use space is generally circular.

IIC explosion proof enclosures often have a cylindrical or threaded flame-path, while Group IIA and IIB enclosures have a flat flame-path. An example of an explosion proof enclosure for hydrogen applications can be seen here, made by Ex-tech Solution.

Explosion Proof Lights are typically Class I, Division 1 rated. They must prevent high voltage and amperage components from becoming an ignition source

In an explosion proof light fixture, any explosions that may occur are contained inside the fixture. Components in a standard lighting fixture such as the bulb, wiring, contacts and switches are exposed to the atmosphere.