RCDs

[steq184]

Quick question. I’ve a consumer unit with a built in RCD so was wondering if I have an outside plug in the garage I’d need to use either a plug in RCD or have a socket with RCD built in.
Thanks for your help

 

[EFLImpudence]

There is no need for a second RCD, but it would do no harm - commonly known as belt and braces.

Either or both might trip with a fault.

 

[winston1]

Quick question. I’ve a consumer unit with a built in RCD so was wondering if I have an outside plug in the garage I’d need to use either a plug in RCD or have a socket with RCD built in.
Thanks for your help

No need. Waste of money in fact.

 

[AndyPRK]

As long as rcd says 30mA in it.

 

[alan333]

Beware some consumer units are "split load", ie there are two sides/halves to it. It's quite common for one side/half to be RCD protected but not the other side. Check whether yours is all RCD protected or not.

 

[AndyPRK]

If you press the test button in the rcd and the socket stops working, you know it is rcd protected.