How To Wire A Lighting Circuit Uk

Sometimes called a loop in circuit this shows how power is distributed around the lighting circuit via the ceiling roses or junction boxes and how to wire a light switch into the circuit.

How to wire a lighting circuit uk. Type one lighting circuit. In modern domestic properties in the uk the main electric lighting circuits are separate from the power ring main circuit. Usually the light base or pendant provides all the terminals necessary to wire up the lighting circuit. The cable going to the light switch is connected as follows fig 2.

Once connected the light pendant should look like this click to enlarge. Without it the blue wire indicates a neutral wire. Power is taken from the consumer unit to the first junction box. The second system in popular use is the junction box circuit or system.

One way lighting circuit using in line switching. The neutrals are connected together using a terminal connector. This is an alternative way of wiring a lighting circuit. Line diagram of a one way lighting circuit using in line method fig 1.

Once you have mastered the basics. Here you can see there is a cut in the line wire connected to lamp 3 so the bulb is switch off and the rest circuit is working. The red wire from the feed cable is connected to the top terminal the red wire going to. Another major defect of series lighting circuit is that as all lamps or bulbs are connected between line l and neutral n accordingly if one of the light bulb gets faulty the rest of the circuit will not work as the circuit will be open as shown in fig below.

The live is interrupted by the switch wiring and the circuit is carried on to the next junction box. Radial circuits are used for lighting there is one lighting circuit on each lighting mcb lighting circuits are usually on a 6a mcb or 5a fuse though 10a can be used with some extra restrictions now removed in the 17th edition of the wiring regs for large circuits however if the area served is large more 5a or 6a circuits would in most cases be preferable. The permanent live wire is wired into the switch and the switched live into the switched live terminal. If this is not the case push in or strip connectors are the preferred way of connecting up the circuit.

Once you have read the safety tips a good place to start is by getting up to speed on the basic radial lighting circuit. Instead of taking the feed wire from the consumer unit to the ceiling rose it is taken to the switch. A one way light switch is quite easy to wire up. You must use the brown slewing to indicate the switched line wire.

This is how you wire a light pendant. Each protected by a 5 amp fuse or 6 amp trip in the consumer unit. A cable is run from the junction box to the light usually via a ceiling rose. Also if we control each lamp by single way spst single pole single through switch in parallel lighting circuit we will be able to switch on off each bulb from from separate switch or if we switch off a bulb the rest lighting points won t affected as is it happens only in series lighting connection where all the connected load would be disconnected.

Faults in parallel lighting circuits. Each house should ideally have at least two lighting circuits.