Junction Box Lighting Circuit Wiring Diagram Multiple Lights

Junction box wiring diagram connecting cables using a junction box. Extending to three or more lights.


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The junction box should be wired as shown below.

Junction box lighting circuit wiring diagram multiple lights. This live feed now loops back out of the junction box cable b fig 2 and feeds power to the next ceiling light in the radial circuit junction box b fig 1. Lighting circuits using junction boxes. 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.

This would be cable a in the diagram below fig 2 which shows how the junction box is terminated. Then using the screwdriver force open three conduit knockouts and insert the screw in wire clamps. Explanation of above picture.

As with the other lighting diagrams in this section the first ceiling rose could be a junction box instead or could be connected via the loop at switch method. The junction box effectively replaces the ceiling rose. Wiring diagram of a one way lighting circuit using junction boxes fig 1.

This repeats for each light in the circuit until we reach the last light. 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. Creating a spur using a junction box.

Let 5 or 6 inches of wire extend inside. Run the wires from the fixtures and the switch to the junction box. 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.

Loosen the screws on the face of the clamps and insert the wires from the fixtures through the clamps and into the junction box. If three four or even more lights are required to be switched from a single source the new cable can be extended to as many lights as required.


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