We have an ATEX control panel in Darwin. We had to connect an ATEX horn and beacon to two M25 threaded entries left in panel for these external devices. Local inspector is questioning our method.
NEC maintains that the seal must be located within 18" of devices that requires a seal off. Further more it states that the only thing that is allowed to be in between the seal off and the panel are explosion proof fittings such as RE bushings, unions, nipples, etc.
We used M25 to M20 adapter, union, 90 degree exp fitting, short rigid nipple then sealoff (puts sealoff 6" from panel).
I assume galvanized rigid conduit is an approved wiring method in Australia for zone 2 locations. I further assume (hope) similar termination guidelines (like NEC reference above) exist.
If anyone could provide Australian current code article number that might apply, please do. In retrospect, we should have just used IEC cable and EExd glands. Thanks in advance..
NEC maintains that the seal must be located within 18" of devices that requires a seal off. Further more it states that the only thing that is allowed to be in between the seal off and the panel are explosion proof fittings such as RE bushings, unions, nipples, etc.
We used M25 to M20 adapter, union, 90 degree exp fitting, short rigid nipple then sealoff (puts sealoff 6" from panel).
I assume galvanized rigid conduit is an approved wiring method in Australia for zone 2 locations. I further assume (hope) similar termination guidelines (like NEC reference above) exist.
If anyone could provide Australian current code article number that might apply, please do. In retrospect, we should have just used IEC cable and EExd glands. Thanks in advance..