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Hi

Ive got a question regarding RCD tests.

If a DB had 7-8 ccts on MCBs all covered by a Main RCD, should we do only one cover-all test on the main RCD, or record an individual RCD test for each circuit?

Other sparkys on my firm have been doing an RCD test for each circuit, effectively testing the same RCD 8 times.

What is the correct procedure?

Thanks
 
you test the RCD the specified 6 tests
x 1/2
x1 @0deg.
x1 @ 180
x5@0
x5@180
test button
preferably with all loads disconnected and test @ the RCD outgoing terminals, and only once.

your mates are either confused or dragging the job out.
 
They are probably testing every circuit, because there is a box for RCD times for each circuit on the forms. I have had this argument with someone before that insisted you had to test every circuit to insure the triping times were ok. I just test at the RCD then put the same numbers in for each circuit.
 
A Rcd has operating characteristics that will apply to all the circuits,if its tested at source,the readings apply to all those circuits off that Rcd

Testing separately and externally for each circuit and including those circuit properties may show incorrect operating values
 
you test the RCD the specified 6 tests
x 1/2
x1 @0deg.
x1 @ 180
x5@0
x5@180
test button
preferably with all loads disconnected and test @ the RCD outgoing terminals, and only once.

your mates are either confused or dragging the job out.

Except, for instance, MEM RCBO's which don't like being tested at the terminals .....
 
it is easier to use a socket, and complies with the "no live working" wimp brigade.
 

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