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You should have the welding earth/return as close the the point of work as possible , to prevent the current returning by the building earthing conductors, I cant remember the number of times I had to change cables because there was a bad connection in the return path, and all the return current...

yes, did you hear the compete story?

why a ring and not a 4mm2 T&E radial? on 25A MCB then a two 13A SFCU one for each (the UFH and the water heater)

you will need more parts ,like a 3 phase contactor the same size as the main switch of the consumer unit, otherwise you will not be able to cut the supply to the consumer unit you will also need a reset switch

remember it well, back in the day there was no PVC tape just rubber and this cloth pitch tape , the armoured supply cables where insulated with paper (all be it oil impregnated paper) it was still paper, cloth coated lead and steel banding, you had to sweat and wipe a joint, and fill it with pitch

I would use M3.5 M4 and have used M6 like this , great for fixing tray work and trunking , to steel work

we are not even in the red yet,

conduit bender and vice with a length of conduit, you would need an old drum to go on first to stop it getting stuck on the vice on a big job maybe 25mm with 20mm inside to stop the bend in the pipe

can you have buried overhead cables? would you not use this Column

who says the guy that did it knew what he was doing in the first place?

i think that is what i said

change the lamps over if the fault moves with the lamp, then get a new lamp, if the fault stays the the holder ,then get an electrician

is that not back to front?

don't you just turn the box over ,top to bottom

if that's a meter box where's the meter?

Isolation, isolation !! we don't get tickles off dead cables, only non isolated live cables will give you a tickle, how much of a tickle will depend how good a contact with the earth/return path, and how dry was your skin was,

Hi welcome, what is the problem with your lights? lets see if anyone can help,

as your location shows Nigeria , your Regs will be different to the ones here in the UK , and we would need a lot more info to be able to comment

I think they are more consumer unit in a box than a meter box