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 ...

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 ...

It's time for another physics example. In this case, I am going to calculate the electric field due to an electric charged rod. Of course you could do this analytically using a bit of calculus. This ...