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apologies for the spelling mistakes, i never wanted to be an office dude!

many thanks for the advice so far, its only an rcd protected CU dur to it bring outside. it has a 32 for sockets and a 6 for lights, only trips when i turn on the light MCB, its fine when just the sickets MCB is on, so does that suggest its a fault in the light circuit? if so what steps can you...

when you mean a genuine earth fault do you mean just on the light circuit plus, the polarity with the RCD is fine because it stays on when the light MCB is not switched on, it only trips when i turn the light MCB on so what stepa can i take please, i know the basics but will probably do it in a...

Hello, i am currently doing some work on an outbuilding, i am in training at the moment, i am supervised etc but i really wanted to find out for myself why the lighting circuit keeps tripping. its only a small CCU with a mian RCD protecting an MCB for the Ring and an MCB for the lights, i am...