While electrical boxes have many variations, they all fall into one of two categories: plastic boxes or metal boxes. Sometimes, the choice is clear-cut and obvious, mainly for grounding. Other ...

I've got a building I'm running some cable for and I've got a problem. In the server room I'm trying to figure out what to do with the cable coming in from the rest of the building. I've got metal ...

What is the minimum size and metal thickness required for a junction box constructed of sheet steel, with one 4-inch RMC conduit (per wall) connected on opposite walls of the box (i.e., directly ...

Rigid metal conduit must be provided with expansion fittings if necessary to compensate for thermal expansion and contraction [Sec. 300.7(B)]. The expansion characteristics for metal raceways are ...

Electrical devices and their wire connections must be enclosed in an electrical box. Known as a junction box, this metal or plastic enclosure protects the wiring. But some devices do not require a ...