Discuss 100A DP Isolator Installation Between Meter and CU in the UK Electrical Forum area at ElectriciansForums.net
Wylex seem to take a different view point;
https://www.electrium.co.uk/media/20151123152755_0_Wylex Domestic Switch Fuse Unit.pdf
Whilst their drive might be financial, they must of received guidance from somewhere.
421.1.201 refers to consumer units and similar switchgear. In BS7671 Switchgear is defined as 'an assembly of main & auxiliary switching equipment for operation, regulation, protection or other control of an electrical installation'. That's sounds like an isolator to me?
Forgetting about whoever installs it then, IF an isolator can be fitted that is of a plastic nature, surely then, that answers all of our questions?
So basically they haven't got a clue and just pass the blame onto you...'The Suppliers and meter equipment would fall outside the scope of BS7671.
As a designer installing any equipment in external meter enclosures we would suggest a risk assessment is carried out to make a judgment of the likelihood that fire originating inside the enclosure or similar switchgear might lead to the outbreak of fire in the household building. We trust this answers your questions'.
Why would you use a 25mm earthing conductor in domestic?that wylex unit has a 16mm earth terminal why does it not have a 25mm terminal,when normally you would be using 25mm swa in it ?.fitted one last week real pain for the earth
So what they are saying is, if you choose to install an isolator you should carry out a risk assessment to cover your own --- in case it catches on fire through fault or negligence. That is what it sounds like to me...?
Why would you use a 25mm earthing conductor in domestic?
25mm 2 core swa or 16mm for the line and neutral and a separate 16mm earthing conductor ran in parallel surely?
To be honest I can’t see you fitting one in their meter box as you just don’t have the room.IMO I can rarely see the time when 'I' would install an isolator. I can see the occasion when I would install a switch fuse isolator, in which case I would install a metal one.
However, the other consideration is, would the DNO/Supplier allow you to fit a metal enclosure in 'their' meter cabinet?
yeah i ran 25mm 3 core it was only 10 meteresWhy would you use a 25mm earthing conductor in domestic?
25mm 2 core swa or 16mm for the line and neutral and a separate 16mm earthing conductor ran in parallel surely?
You can get a reducer pin for the 25mm so you can terminate into the terminal easier.yeah i ran 25mm 3 core it was only 10 meteres
just getting my post count upCrikey this really is minefield of what if's isn't it...
Maybe I will not bother with it...
To be honest I can’t see you fitting one in their meter box as you just don’t have the room.
It’s hard work trying to convince a builder to fit a 2nd meter box to house the fused isolator
just getting my post count up
My experience regarding the length of the ‘tails’ with the DNO is basically “we don’t care”I did come close to fitting one in a cabinet on one job. Was room just. Got to the point of enquiring with the DNO, but when I measured my tails run, it was 3m.
Reply to 100A DP Isolator Installation Between Meter and CU in the UK Electrical Forum area at ElectriciansForums.net
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