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 Post subject: dead light switch
PostPosted: Mon Jul 24, 2017 10:11 am 
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Hi chaps. I'm in the process of renovating my kitchen and it has a light switch on the wall that has never worked. I'm planning to remove it anyway so I checked the back and it has 2 cables to it- one is black/red and the other is red/blue/yellow. The two reds are in one terminal and yellow/black in another. The spare terminal has nothing in it-even the screw is missing- and the blue wire is not connected to anything.
When I put my meter across the red/ black,yellow it shows 160v. Why is that? I'm assuming its another switch for the light as there is one the other end of the room that works. Should the blue be connected to the spare terminal to allow it to work?
Like I say, its going anyway but just interested.
Thanks.


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 Post subject: Re: dead light switch
PostPosted: Mon Jul 24, 2017 4:58 pm 
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I can only assume that the switch was once part of a two way switching arrangement that for whatever reason was no longer required.

What colour cores do you have at the other switch ?

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 Post subject: Re: dead light switch
PostPosted: Mon Jul 24, 2017 7:23 pm 
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The voltage you are reading is probably induced. Or it may be you are reading "across" a lamp. Did you check the voltage to earth?

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