Summary: Learn how to use a continuity tester to check a socket outlet.
A continuity tester is used to check that a socket outlet with two cables connected to it is connected to the ring main. Before installing a spur the socket must not already be supplied by a spur.
Clip the continuity tester onto the end of one core and touch the other core with the probe.
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The colour-coding system for electric cable changed in 2006, make sure you read Electric cable and flex to view the new information.