How to carry out RCD test for shower?

[nazoom]

Hi

My exam is coming soon and I have a question.
My installation is single phase , TN-S. There is a shower unit protected by the RCD. My questions are:
Do I carry out RCD test at the RCD itself in the C/U or do it at the shower unit itself? If at the shower unit where does the tests leads go?

Many Thanks.

 

[wallyanker]

Do the tests at the CU

 

[D Skelton]

Which exam are you on about out of interest?

 

[nazoom]

Fault finding and testing for Periodic Inspection and testing.

Thanks.

 

[D Skelton]

Ah, ok. You can carry out the test at the CU. Line lead to 'line out' on RCD (bottom left), neutral lead to 'neutral out' on RCD (bottom right) and earth lead to earth bar.

Edit: Presuming that it's a normal RCD

 

[nazoom]

So there is no need to do RCD test on the shower unit itself? Yes the RCD is normal.

Many thanks.

 

[D Skelton]

No, the clue is in the title

It's called an RCD test, not a shower and RCD test.

Happy to help

 

[sparky-s-w]

what about an RCD trip time test, that would have to be done at the shower isolator no

 

[somersetsparks]

No all rcd tests should be done at CU with loads disconnected.

 

[Guest55]

Bang on ^^^^