"Electrical wire" is a catch-all term that refers to conductors which route electricity from a power source to lights, appliances, and other electrical devices. What's a conductor? It is a material that electric current can flow through with very little resistance. Copper is the most commonly used material for electrical conductors used in home wiring; aluminum is occasionally used, too.

Conductors used for carrying electrical current have an outer sheath of insulation to prevent against the unwanted transfer of electricity (this insulation is stripped from the ends of the wires where connections are made). Bare (non-insulated) conductors are used for grounding, which is explained fully at Grounding Electricity.

Conductors vary by more than their material or insulation. They also vary by size (gauge), construction, and general makeup. When working with wiring, it is very important to choose the right type of wires for the job. The article called Electrical Wires & Cables can be very helpful for making the right choice.

Browse through the various articles listed below to find additional helpful information for safely working with electrical wiring.