How To Wire A Lighting Circuit Junction Box

If you have to install a metal box however the ground wires of all cables in the box must connect to the ground screw on the box.

How to wire a lighting circuit junction box. The reason why the wiring of a lighting circuit is more complex than a power circuit is that each outlet or light fitting needs to be controlled by a separate switch. By making the splice in the. Once you find it you can push your wire through the hole and use fish tape to push your wire through the cable clamp and attach it to the junction box. Electrical codes generally require that all electrical devices and the wiring connections to those devices must be enclosed in an approved electrical box often known as a junction box this metal or plastic box includes a cover to protect the wiring within and protect you from the wiring.

Junction box wiring is often attached to electrical outlet or light fixture wiring. Line diagram of a one way lighting circuit using junction boxes fig 1. The national electrical code nec dictates that no wiring splices are allowed outside of an approved enclosure. Fig 2 the feed cable comes from a previous junction box or from the consumer unit the red black and earth wires are connected to separate terminals.

If you want to spur off from a current circuit to provide power to a new socket of light again make sure the power is off and the circuit is isolated and wire your junction box using the method below. Junction box wiring diagram connecting cables using a junction box. Lighting circuits using junction boxes. An alternative method this uses the same wiring principles as the looped ceiling roses but here the connections are made in junction boxes rather than the ceiling rose.

Explanation of above picture. The junction box effectively replaces the ceiling rose. Explanation of above picture. Your electrical box or light switch should have a cable hole for you to insert one of the wire into.

Fig 2 the feed cable comes from a previous junction box or from the consumer unit the red black and earth wires are connected. Creating a spur using a junction box. One way lighting circuit using junction boxes. Wiring diagram of a one way lighting circuit using junction boxes fig 1.

A new junction box is used to create wire connections called splices in the home. The junction box should be wired as shown below. One way of providing for this is to install a four terminal junction box in which the cable from a light and the cable from its switch can be connected to the circuit cable. The junction box should be wired as shown below.