Yes - but only if that switch is from the same manufacturer as the consumer unit, and it has been specifically designed to fit into that consumer unit.
... and (although I suppose that someone is probably going to prove me wrong
) I would strongly suspect that no changeover switch that met those requirements would be available for any CU, wouldn't you?If it is designed/intended and tested in one of their CUs, then I assume you're right - as I said, I didn't doubt that someone would prove me wrong.
Thanks for the search John.
Actually 8 for solar to provide the isolation between mains and invertor.
I've made that point several times above!
You probably need to tell that to those responsible for the 'fraction of a second' (or 'a second or three') power cuts we often get here!
That's what I now do (plus some loads, like 'standby lighting' and 'generator-only sockets, permanently wired to only the genny supply, and hence never used with DNO-supplied electricity. I originally had a changeover switch, but the only one I could get hold of was a massive cast iron job, which came to be ';getting in the way'!
Actually quite a common arrangement and one which the leccy board of the old days seemed to understand. Two farms I used help to 'maintain' had exactly that and the DNO guy happily supplied the second farms pre-used main fuse holder.
Fridge compressors are fine with a brief power drop, it’s power drops that last for extended times that can be problematic as the refrigerant slowly finds its way back down into places it doesn’t want to be when the compressor kicks back in. A couple seconds is fine.
I do work on many farms, and many large dairy’s. Most three phase. All have changeover switches and either tractor driven generators or dedicated diesel sets. Advocating the use of swapping fuses is dangerous and non compliant. Just because one person understands doesn’t mean everyone will.
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