The different colors of electrical wires indicate the function of the wire, with black and red indicating the wires carry electric current, white usually indicating neutral charge and green indicating the wire is grounded. The colors, regulated by the National Electrical Code in the United States, are standardized for safety.
Black wires are always hot wires, meaning that they carry electricity. Black wires are never used as ground or neutral wires and must always be treated with caution. Red wires are also hot wires. As hot wires can be connected to each other, a black wire can be connected to a red wire. White wires are always neutral in 110-volt circuits but can be used as the second hot wire or switch leg in 240-volt applications and three-way switches, respectively. Green wires are used for grounding and should only be connected to other green wires.Learn More
Electrical wires must first be stripped, then twisted together and covered with a wire nut in a junction box in order to be spliced together properly, according to Home Depot. Splicing joins two or more electrical wires together in order to make wires longer or to facilitate more outlets for electrical appliances in a room.Full Answer >
If an electrical outlet is warm to the touch, it means that there is likely a short circuit in one of the wires. A short circuit occurs when electricity skips some of the path it was intended to take in the circuit design. When this happens, it creates excess heat that the wires and terminals are not designed to handle.Full Answer >
To mount a shallow electrical box on a wall, trace its outline, cut around the tracing with a drywall saw, thread the wires through the box, set it into the wall, and hammer it into place. The required supplies are a torpedo level, a pencil, a drywall saw, a hammer and a screwdriver. This procedure usually takes about an hour. Check local electrical codes before installing an electrical box.Full Answer >
The National Electric Code requires that wire placed in Schedule 80 PVC must be buried at least 18 inches below ground. If the wire is being buried without PVC, it must be at least 24 inches underground.Full Answer >