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Why does an RCD trip when N and E are shorted even though L has been disconnected?

What makes one Gu10 last longer than another?

We had a burglary and they dragged the fridge (yes fridge) over the newly laid engineered oak floor. The scratches seem to be mainly just on the the lacquer (varnish?) and not through to the oak itself. What is the best way to fix this? Someone suggested T cut. Thanks

Can anyone tell me where I can find a table showing the acceptable values for the resistance of protective bonding conductors when measuring (establishing) their continuity.

Has anyone used a meter box for 3 phase and had any problems with the size of the box? I have supplied an approved 3 phase flush mount box but have been told that they refuse to fit the service head as the box is too small.

When doing 1st fix for a timber frame house I use the noggin with steel back box screwed to it method, but I find that the tackers (plaster boarders) usually do the cutouts really badly or cover over them altogether and plasterers some times fill them in with plaster. Does anyone have the same...

I have been asked to quote to supply and fit a Ryfield dist. board for 5 flats. Is it not the case that, as the board fits after the head but before the meters, it is the DNO's responsibility to supply and fit?

Hope this is the right place for my question. We live in a bungalow that has been added to several times. The problem is that in some of the rooms there is the smell of damp but there is no obvious or visible damp patches on the walls. We do have terrible condensation problems on the metal...

There are two small flats in this new build block. A one bedroom and a two bedroom. I will need three separate meters, one for each flat and one for the common parts. Will this require the DNO to fit three separate service heads? And can I ask the DNO to fit three isolators?

We have just built our house with new casement windows. The problem is that rooks have systematically pecked and removed the sealant between the glass and the frame. What can I do to stop this other than spend all day chasing them away?

I need a 2 gang switch but one of them needs to be an intermediate and one a 2 way. The range I am using does not have such a thing. Is there a way round this?

Can you use two different makes of smoke alarms on the same circuit, both being mains-powered ionisation alarms with backup battery (but different makes as I said before).

Does anyone know where I can get them.

A TT supply, tails from meter into Henley Block supplying house CU (split with main S100mA and 30mA side) and single 30mA RCD. This single RCD supplies (via SWA) garage supply which is a normal garage CU (30mA RCD main switch with a 16A and a 6A MCB) The garage has its own earth rod and has a...

Does anyone know where I can get plastic M3.5 screws?

Is there a way of doing 2 way switching when there is only one twin and earth cables run to each of the 2 switch positions from a JB?

I am wiring four bollard lights with PIRs to have them come on as people walk down the long drive. I have run a 1.5 mm 3 core SWA from an all -weather FSU ( because I cant make the connection indoors). What is the best way to connect from PIR (to light) to PIR etc?

Does anyone know of any.

Does anyone know of a device (paslode type device) that can fix twin and earth to brick/ concrete etc?

It is a TT supply. The 30mA RCD when I test it isolated from the final circuits it serves, the results are as I would expect for a new RCD. If I then connect up the ring and test the RCD at a socket using the plug in adapter, the RCD fails (1 times is > 300mS) . Why should that happen, am I...