It is important that installers and inspectors have a working knowledge of electrical theory. Such knowledge is often vital in determining proper size of conductors for circuits of various loads.

The National Electrical Code is adopted nationwide, but how it is adopted and where it is enforced can vary greatly.

Recent Internet searches have revealed that the term “earthing” appears far more frequently than “grounding.”  Does this indicate a usage transition from “grounding” to “earthing”?

Chapter 5 covers Special Occupancies, including areas such as hazardous locations, medical facilities, carnivals, mobile home parks, and more.