Month: April 2016

Insulation Resistance Testing

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Remember this test can damage equipment and there is also a risk of electric shock from the d.c. voltage produced by your test instrument (usually 500v). We are testing to ensure that the insulation surrounding the conductors is adequate and that there are no short circuits between conductors. It can be done on a complete … Read more

Sockets, Ring and Radial Circuit Arrangements

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Appendix 15 in BS7671 is probably the most useful practical description in the whole book. If you want to know what you can do and what goes where it’s all here. Ring Socket Circuits… Spread your sockets around evenly to avoid overloading any part of the ring. Don’t put immersion heaters, storage heaters on the … Read more