The new 110.24 of the 2017 NEC requires service equipment to be marked with the maximum available fault current

My field inspector was calling about a couple of items that he had discovered while performing a final electrical inspection for a new restaurant.

So what are transformers, and why do we need them in our systems?  Transformers are power conversion devices that allow us to change the operation voltages within our facilities.

In many applications, LEDs are replacing neon as a light source for signs, causing confusion as to what is required by the NEC.