I'm using a NEMA 4X enclosure that is being supplied intrinsically safe power for a Class 1 Div 2 application. In the NEMA 4X enclosure, I will have several 3-position selector switches.
1.) For those selector switches, will I need to use hermetically sealed contact blocks or am I allowed to use standard contact blocks?
2.) If we are allowed to use standard contact blocks, which article & section of the NEC states that we can use them?
Any help would be appreciated! Thanks!
1.) For those selector switches, will I need to use hermetically sealed contact blocks or am I allowed to use standard contact blocks?
2.) If we are allowed to use standard contact blocks, which article & section of the NEC states that we can use them?
Any help would be appreciated! Thanks!