All questions and answers are based on the 2020 NEC. Q. What is the NEC requirement for securing and supporting rigid metal conduit (RMC)? A. RMC must be installed as ...

This answer is based on the 2017 NEC. A. Exposed Type NM cable must closely follow the surface of the building [Sec. 334.15(A)]. Nonmetallic-sheathed cable must be protected from physical damage by ...

Here are some important things you need to know about underground wiring so it's safe and provides many years of service.