In Part 1, we looked at how to size a branch circuit and walked through a simple example. So if you’re sizing a feeder, why don’t you do it the same way? Except in cases where a feeder is also ...

What is an electrical conductor? An electrical conductor is generally a metallic material that freely conducts electrical current. The best conductor is silver, followed by copper, and then aluminum.

Article 310 contains the general requirements for conductors, such as insulation markings, ampacity ratings, and conditions of use. It doesn’t apply to conductors ...

Key learning points Electrical charges What are free electrons? Cell polarity Conventional current direction Electrons orbit the nucleus. An atom has a neutral charge, because it contains the same ...

Knowing the sag, tension and temperature of overhead conductors is crucial in the construction and maintenance of properly designed power lines. Currently, a majority of constructed power lines are ...