Art. 340 covers the use, installation, and construction specifications of service-entrance cable (Types SE and USE). Type SE cable has a flame-retardant, moisture-resistant covering. Type USE cable, ...

A transformer transfers electrical energy from one system to another by induction. Except for grounding and bonding connections, there’s no physical connection between the two systems. For this reason ...

The electrical panel, also known as the service panel, is the control center for all the electrical circuitry in a residence. Today’s panels are bigger than earlier versions. They have to be, because ...