On 28/05/2015 00:45, Dave Plowman (News) wrote:
In article ,
GB wrote:
Tell me, dennis, just why would there be any 'movement' in any part of a
properly installed final ring circuit?


Why do faults occur in electrical circuits if there is no movement?

There must be thermal expansion and contraction, surely?

As there is with any metal. But you don't expect the copper pipes in your
central heating to fail,

You may not expect it, and indeed I did not, but:

http://wiki.diyfaq.org.uk/index.php?...e_rubbing_pipe

so why expect wiring to do so?

That I expect more - however its only an issue on circuits that run at
near full load for extended periods IME.


--
Cheers,

John.

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