When it comes to the actual wiring in your home, the most common type of wiring is what is referred to as NM or nonmetallic cable. This cable consists of two or more individual wires wrapped inside a protective plastic sheathing. NM cable usually contains one or more hot wires, a neutral wire, and a ground wire.
You may need electricity in areas of your home that are exposed to water. For this type of application, an electrician will use Underground Feeder or UF cable. UF cable is a type of nonmetallic cable designed for wet locations and can be buried directly in the ground. It is commonly used for supplying electricity to outdoor fixtures, lampposts, and outdoor lighting.
Always make sure anytime you are working with the electrical circuits and wiring in your home that you consult a licensed professional electrician.
After you read this article, you may want to check out Electrical Panels and Receptacles.