Linking smoke detectors

Joined
24 Jul 2006
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Berkshire
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Seems to me the obvious solution is to use 3-core & earth lighting cable and use the third core as the linking signal. Is this the way it's normally done?
 
Sure is, 1.0mm 3 core and earth.

Although I have seen quite a few SD linked via TE jobs with the earth being used. When I mentioned it to the guy his logic was that the Earthing point on the SD was a dead stop, so the unit didn't need an earth.

I gave up, wasn't my place to offer up good practice and CPC sense :roll:
 

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