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 ...

Before you can size the branch circuits for a dwelling, you must calculate the loads. Article 220 allows two distinctly different calculation methods: the standard method in Part III and the optional ...

Note: This article is based on the 2002 NEC. Even if you work with stamped drawings, you'll eventually need to do commercial load calculations in the field or on a licensing exam. The National ...