All questions and answers are based on the 2017 NEC. Underlined text indicates a Code change. Q. What is the reason stated in the NEC for connecting electrical systems to the earth (grounding)? A.

It’s important to understand the difference between grounding and bonding so you correctly apply the provisions of Art. 250. We earth ground systems to the earth to reduce overvoltage (from ...

A number of cloud-based data storage companies are finding their new home in the Phoenix region. As a result, the Arizona Public Service (APS) transmission line system has recently seen significant ...

A friend who was buying an older house was concerned about electrical safety and asked for my opinion as an electrical engineer. All of the AC receptacles (also called outlets) in the house were the ...