Do the electrical components of a Tunnel Boring Machine for a tunnel construction in Virginia have to be UL approved or listed?. The TBM will be mining in gassy conditions (C1D2)
Have no idea about legal requirements for heavy equipment and mining operations.
NEC doesn't cover.
Maybe start with OSHA and go from there. It's not an electrical question.
(B) Not Covered. This Code does not cover the following:
Installations underground in mines and self-propelled
mobile surface mining machinery and its attendant electrical
I'd start with MSHA.
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