done all of the above but to no avail. tested across pins 1 and 4 of the rcd for resistance with test button pushed - no reading. rcd's knackered. bought and fitted different manufacturer rcbo, job done.
need a little help please. I've just changed out a plug in fuse for a shower cu (63a rcd 50 a mcd). Connected correctly, shower powers up ok but when i push test button the rcd doesn't trip. At first I thought faulty rcd so I got a replacement of the same model. Connected up and the same...