A high current mcb supplying storage heaterssometimes these are run from the main cu but often from a timeswitch controlled dedicated cu with either a separate off peak electricity meter or a dual tariff meter. The cable going to the light switch is connected as follows fig 2.

Electric Light Wiring Diagram Uk C3 Wiring Diagram
Uk light wiring diagram. Line diagram of a one way lighting circuit using in line method fig 1. Wire a light switch in one way lighting circuits. Each protected by a 5 amp fuse or 6 amp trip in the consumer unit. Once you have read the safety tips a good place to start is by getting up to speed on the basic radial lighting circuit. Each house should ideally have at least two lighting circuits. Wiring a 3 way light switch.
Wiring a 3 way light switch is certainly more complicated than that of the more common single pole switch but you can figure it out if you follow our 3 way switch wiring diagram. The circuit is fed to each lamp fitting in turn and a. So before we get stuck in to some wiring diagrams start here to make sure you keep yourself safe. This is a diagram of a ceiling rose using the old colours where live is red and neutral is black. The red wire from the feed cable is connected to the top terminal the red wire going. In modern domestic properties in the uk the main electric lighting circuits are separate from the power ring main circuit.
Loop in as per diagram above. With a pair of 3 way switches either can make or break the connection that completes the circuit to the light. A one way light switch is quite easy to wire up. All the light wiring diagrams are available in the old and the new cable colours to avoid confusion. Light wiring diagrams for domestic light wiring. The radial lighting circuit has 3 common wiring options which may be mixed at will.