May?Firstly rest assured I have no intention to make this a diy job. I was left a Safety Advisory Notice form which pointed out in the Advisory section that firstly that "the existing main switches may require upgrading"
He made them uneven.and secondly "Uneven cable sizes".
I very much doubt that their side (i.e. coming in from the street) has 25mm² cable.Then under Additional Notes he wrote Multiple Switchgear, Old type 16mm on customer side, 25mm on our side.
That is just the maximum rating. It is no indication of the actual fuse rating.Electrician to inspect + upgrade. There is no demand to do anything and no date by which anything should be done so I was left with the question in my mind is this a case of it would be nice to have or a case of MUST do. Hence my question as I want to know with what urgency I have to move. To answer your questions There is a odd shaped black box where the mains cables enter the house that has two metal wired clips on and two 25mm cables that go to the meter. Imprinted on this black box is 100A.
If that is the case then all is well.From the meter 25mm cables connect to switched Fuse boxes each containing 60A fuses that then carry the 16mm cables to the domestic fuse boxes.
Thanks
The Distribution Network Operators have different rules and use 16mm² for 100A supplies.Clipped direct 16 mm² is rated at 87 amp See here on the chart on a continuous basis even with a 100 amp supply it will never exceed that for long enough to be a problem,
If you mean a larger isolator - Why?my home like many older homes is on a 60 amp fuse as the old Wylex fuse boxes the main isolator was only rated at 60 amp so for the supplier to fit a larger one he would be in breach of health and safety regulations,
Yes.with a 60 amp fuse your well within the limits.
From the information we have I would say yes, you can ignore it.Can I just ignore this Safety Advisory Notice or do I still have to get an electrician in to confirm what you have said and do I need him/her to confirm in writing?
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