Ah I see, there are a few things thats rough about it, the service head isn't fastened to anything really, the 6 submains are just held with pinching glands and the new backboard is loose.
Thats the one. Tails straight out of the Bemco (which only has fuses in in) and straight into the LL board via the isolator. There are a few blocks the same as this dotted around, I wonder if they are all done like this. Free electric for years, quite a new board as well, 2018 if the label was...
Took me a while before I realised, the building is a block of 6 flats, all submains go to each flat with the meter and consumer unit located within the flats for each unit.
Surely the banjo is earthed if you are testing voltages to it, if you disconnected the earth to the banjo but the box or whatever its fitted to is screwed to a wall or something then you will still get some voltage between it and live.
Its not that people wouldn't work for £250 a day, I would, but I wouldn't work as a subcontractor. I prefer to do my own thing, I could never stand there whilst somebody is telling me their way is best and what they say goes.
You normally wire these in series with a pipe stat, so the frost stat turns the boiler on and as soon as the pipework gets hot then it switches it back off again, its only to stop the pipework freezing, not heat the rooms.
Thanks for the explanation, I'm not sure I understand everything but sort of get it, I've watched big clive tear down SPD devices before now and ween the gas discharge tubes inside them. I think the simplest explanation is it matters how short the cables are when they are across the mains as...
I remember watching a John ward video a while ago on SPD's and cable length and kind of understood it at the time but it just doesn't make sense to me now. The surge must originate outside the building somewhere and is brought in by the main cable I guess. This main cable could be any length...
The problem with this job is its 2 buildings into one, I think I posted a thread on it a while ago. Its one building with one entrance door but it has two of everything including incoming supplies/meters. The customer wanted it wiring this way so there are two mains units, one for the left half...
The newerclip in Wylex blanks are a big improvement on the others, they grip the sides quite firmly now. As you say the older type used to slide about all over the place, it was hard enough even trying to get a horizontal cover on with them in never mind a vertical one. I will look into the...
Got loads of Wylex metal blanks, I presume they will fit in. As for surge, I'm going to fit a 3rd party one in an external enclosure, the price of the wylex one is ridiculous. Thats if it needs a SPD at all, not too sure of the commercial regulations.
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