RCD Wiring

4 Jul 2007
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United Kingdom

My house has two separate 30ma RCD's wired directly from the meters, one is for the house domestic circuits going to the CU and the other one is from the economy seven meter going to a separate CU.

I noticed that the RCD's have been wired up with the feed going to the bottom terminal and the output out of the top. I thought RCD's needed to be wired with the feed to the top.

Also, as the RCD's have been wired directly from the meter tails there is no way of isolating the supply to change the RCD without pulling the incoming 100A fuse, that seems incorrect.

What do you think??.

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Normally RCDs are not bothered if the feed comes in the top or the bottom. Why do you have an RCD protecting the E7 stuff? Are you on a TT supply?

Can you take a photo of the mains / CU / meters for us to have a look at?
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That was quick.

Yes it is a TT supply. I will check on the manufacturer of the RCD.

I will post some photos in the shortly.

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