![]() ![]() Switch loop through (the circuit connects to each switch in turn, and a separate cable goes from the switch to each lamp).The circuit is fed to each lamp fitting in turn, and a separate cable connects from the fitting to the switch. The radial lighting circuit has 3 common wiring options, which may be mixed at will: Sometimes 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). A high current MCB supplying storage heaters. 16A MCB and cable supplying hot water immersion heater.ĪEI Storage heater switch with separate supplies for (unfused) off-peak supply on dedicated radial circuit and (fused) boost/fan supply on the socket circuit.Outdoor lighting supplied by a 6A MCB, often via a PIR motion detector switch.2 way lighting switching for stairs, large rooms & walk through rooms.Dedicated high current circuit MCB & cable supplying shower.Dedicated circuit MCB & cable supplying cooker.Systems often have some of the following as well: 10mm² Main equipotential bond to other incoming metal services (gas, water, oil). ![]() Radial lighting circuits from 6A CU MCBs.2 such rings is typical for a 2 up 2 down, larger houses have more. ![]() Ring circuits from 32A MCBs in the CU supplying mains sockets.Live & Neutral tails from the electricity meter to the CU.In a typical new town house wiring system, we have: Typical house wiring diagram illustrates each type of circuit: ![]() These apply to new wiring, and in many cases are not requirements for existing wiring. Some regulatory requirements are mentioned in this article. This article is an introductory overview rather than a complete A to Z on rewiring, and assumes some basic electrical knowledge. Information and plans should be independently checked and verified before action.Īnyone installing wiring should also understand some basic safety issues not discussed here.
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