electrical wiring at home – the ring circuit

Wikipedia has a good description of how a ring circuit is used in home wiring.  The diagram below is neater than the one I drew on my board in class.  You can click on it to view a larger version of the drawing.

drawing by Andrew C.
  • The ring circuit for power sockets is rated at 30A.
  • The ring design allows electricity to reach the socket from two different directions, so the current flowing in any one wire is lower.
  • Since the current is lower, a thinner cable can be used.  This saves money as copper is expensive.

Click below to download the Scout guide to home wiring.