rcd help

[JB30]

When i rcd test with my fluke meter it works on some circuits and on the rest it reads 310.0 Ms an wont trip!! Wots up?? Please help!

 

[markc123]

what?

What do you mean it works on some circuits? Stick it into a socket and test on half, 1 and 5 (both cycles) readings that don't comply = change the RCD.

 

[somersetsparks]

More info needed mate? You only need to test the rcd with all loads disconnected (switch mcbs off) at the load terminals of the RCD.

 

[telectrix]

try pressing the test button on 1 of the RCDs that won't trip. if it works then, it's probably become sticky as nobody's tested it for donkeys.