Discuss Main fuse protection in the UK Electrical Forum area at ElectriciansForums.net
I've had quite a few DNO fuses blow amongst my customers. The rural area I'm in was 'electrified' in the mid '60s, and all the farmers, who up to then had been managing with 2.5 or 3.5 kVA generator sets, thought that a 15kVA supply would be more than enough to satisfy all their future needs.only main fuse I have seen blown is where they had a 60amp fuse and had installed own ev charger, coupled with 2 electric showers, range cooker and induction hob. one night it went pop as they were busy getting ready for a family get together, lots of cooking, washing etc.. I was called to sort out the charger only.
the funny thing was the dno said that had they contacted them they would have changed the cut out and given them an 80 amp fuse free of charge but instead relied on diy dave down the road who did it all cheap and watched a few videos to fit car charger themselves. never seen a 100amp fuse blow
I suspect part of the issue would be NFU and the like not advising farmers properly in terms of what is actually required onges of power to run large scale operations.Q
I've had quite a few DNO fuses blow amongst my customers. The rural area I'm in was 'electrified' in the mid '60s, and all the farmers, who up to then had been managing with 2.5 or 3.5 kVA generator sets, thought that a 15kVA supply would be more than enough to satisfy all their future needs.
Forwards a couple of decades or so, and many of them were running 100 cow dairy herds and associated equipment off of this same supply, as well as large farmhouses, and popped DNO fuses were a regular occurrence, along with the odd meter board burn up.
I still have one customer, currently installing a £1 million+, 500 cow dairy set up, that I've only just manged to persuade that he needs to upgrade from 15kVA single phase.
I had one a couple of years ago where I measured 170A peak on the supply to the milking parlour only.This actually reinforces the original point. If you can just about run not only a farmhouse but also a farm c/w milking plant, with only 60A total, then 100A ought to serve most domestic requirements.
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