Recent content by Thomasdh

And the answer is: It turned out to be the mains halogen recessed downlights in the bathroom. After disconnecting the first downlight and splaying the live, neutral, and redundant earth (no earth connection in the downlight) apart from each other so they couldn't touch, then reconnecting the...

OK, to confirm it was a problem with the bathroom lighting and not the stairs/landing or bedroom 2, I bypassed the bathroom lighting junction box and connected up junction boxes 3 and 4. Both stairs/landing, and bedroom 2 were fine, not tripping, and lights came on. Therefore, I can now look...

I've disconnected junction box 2 (nearly all the way back to the CU now!) and so the only lighting on the circuit is to bedroom 1. Reconnect inside the CU, and voila, no tripping and it's so good to see a light come on! Seems like it is fault with the bathroom lighting... Chri5, I'll...

Interesting... I disconnected junction box 4, reconnected the circuit inside the CU, then flicked a light switch and it tripped. So the fault is closer down the circuit to the CU... So, I disconnected junction box 3, reconnected the circuit inside the CU, then flicked a light switch and it...

BSBS - the lighting circuit hasn't changed since the CU was installed. Thanks though. Flameport - if a cable has been damaged by crushing, would I be able to tell by looking at it?

The ceiling roses don't have any loose connections in them. It's wired like this - feed from CU to attic, junction box 1 (feeds bedroom light and switch), junction box 2 (feeds bathroom light and switch), junction box 3 (feeds stairs/landing light and switches), junction box 4 (feeds 2nd bedroom...

I don't have conduits - what would I be looking for though?

Still trips. Checked the whole lighting run in the attic, moved everything off the cables (even if on boarding), then reconnected the circuit in the CU and turned an upstairs light on. It tripped again.

Thanks for quick and definitive response. I'll go up now and ensure they're all free from anything pressing down on them, then report back.

I've got a Wylex 100A split load consumer unit. Layout is as follows (from left to right): Attic Lighting (6a MCB), Upstairs Lighting (6a MCB), Basement Socket (20a MCB), Living Room Sockets (32a MCB), Kitchen Sockets (32a MCB), RCD (80a 30Ma) / Basement Light (6a MCB), Downstairs Lighting...