On 03/06/2019 14:52, ss wrote:
On 03/06/2019 12:37, Jim K.. wrote:
For this application a non contact volt stick will work well
Yes I have one of those.

Rather begs the question, why do you have one? given your op...
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Because even for something like changing a wall socket or light switch I
switch the mains off and double check with volt stick.
My safety drill far outways my electrical knowledge.

I think John meant that you can reverse the way you use a volt stick for
safety. That is, turn the circuit /on/ and use the volt stick to see
which red is always live and which live only when the light switch is on.

The clever bit is remembering to turn the circuit off again before
grabbing the reds to label them. But if you forget it's not always
fatal, but can be memorable.

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Robin
reply-to address is (intended to be) valid