Explosion protection to-CENELEC-IEC-NEC Can be used inZone 1 and Zone 2Zone 21 and Zone 22Class I, Zone 1 and Zone 2Class I, Division 2, Groups A, B, C, D Copper-free Aluminum / GRP (glass fiber-reinforced polyester resin) enclosure Weather Proof Junction Boxes Die-cast aluminum alloy enclosure with powder coated surface Widely used for wire allocation of pipes, pipe distribution, wiring and wire distribution Built in 4 terminal pieces The thread can be specially made upon request, such as NPT thread. Steel pipe wiring is provided (please specify if cable wiring is needed),