company switch

I’m hoping to learn if there are any rules-of-thumb regarding a permanently-installed breaker panel and the quantity and capacity of the breakers located within it. The space in question is a soundstage for single-camera film/video shoots (within a commercial office building), which under normal...

I am attempting to explain to a licensed electrician why an onstage switch would need to be fused.In our example, there is a 100A 3-phase (4 wire + ground) feed to the stage, which is directly wired from a 100A 3-pole breaker in a separate panel. That panel is in another room.The box they...