OLD WIRING DIAGRAMS

Wiring a Light Fitting | Guide for How to Fit a Light
Ceiling rose wiring diagram You can see from the above that the loop wires (all wires in this kind of lighting circuit belong to the lighting "loop") are connected to terminal blocks. The live terminal is fed from the consumer unit and in turn gives live power to the other cables in the circuit, in this case 1 supplies the live power from the source, where it is taken by cables 2 and 3.
Wiring Diagrams for Household Doorbells - Do-it-yourself
Wiring Diagram for a Two Chime Doorbell Wiring for two doors is the same as for one with the transformer hardwired to the 120 volt source from a house circuit. Connect the input wires on the transformer to the source circuit using the black to black, white to white, and ground to green method.
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