Whilst I agree that there will never be a reason for using 2.5mm² flex with a BS1363 plug (and one might struggle to get it to fit), what are you suggesting "would not permit" it?
Kind Regards, John
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Kind Regards, John
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Well, not to add to the debate, but there might be a reason, if you're making a 100m long extension (I haven't calculated the exact length)
But agreed I always thought plugs weren't designed for 2.5mm.
Yes, I had overlooked extension leads. If one is contemplating a potential load of 13A, then I would think one would need 2.5mm² (if not 4mm² - and getting that into a BS1363 plug would be next-to-impossible) for lengths much shorter than 100m (depending on qhat VD one was prepared to accept). By my reckoning, the voltage drop of 100m at 13A would be 41.6V with 1.5mm² (~18% of 230V)and 24.7V (~11%) with 2.5mm².
Kind Regards, John
There is no requirement to follow manufacturers instructions, especially when they are wrong.
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Where did you read that?
We do have Table 52.3 so you never know, but
why would anyone actually prohibit such a thing?
why would anyone actually prohibit such a thing?
Well, although I doubt that such is the case, someone might try to 'prohibit' it if they felt that the mechanics were such that 2.5mm² cable could not be safely terminated in a BS1363 plug.
As for who the 'someone' might be, I suppose there's the manufacturer's 'instructions', but what gets connected to a BS1363 plug is presumably outside of the scope of BS7671. Does BS1363 itself perhaps have something to say about this? Stillp?
I've certainly seen 2.5mm² flex connected to a BS1363 plug a good few times, and I even think I have seen 4mm² successfully crammed into one!
Kind Regards, John
BS1363.
Well, they might 'feel' it but it is not the case.
I can't say I've ever looked at the instructions on wiring a plug.
Just seen Risteard's post so will await Stillp's possible reply -
unless you, Risteard, can quote the actual wording.
Nor me - maybe it's the time to look!
Quite so.
Kind Regards, John
Not the latest version, note, although I very much doubt that this bit has changed:
I guess the issue is that you cannot assume that a plug will take > 1.5mm², as there's no requirement for it to do so.
I don't know if that forbids makers from producing plugs which can, or forbids users from using 2.5mm² if they find it does fit OK.
I've got a plug with that size in it, and it took some care to get it in. I don't see how 4mm² would ever fit.
I guess the issue is that you cannot assume that a plug will take > 1.5mm², as there's no requirement for it to do so.
I don't know if that forbids makers from producing plugs which can, or forbids users from using 2.5mm² if they find it does fit OK.
I've got a plug with that size in it, and it took some care to get it in. I don't see how 4mm² would ever fit.
I think that answers everything.
That's correct.
It doesn't prohibit anything.
Back in the days when MK were a reputable manufacturer, they used to offer a plug that would take 2.5mm² flex - I well remember them, as a lecturer at the college where I was a technician had me make a number of 2.5mm² extension leads with them.
What plugs were those? I find it difficult to get a good fit around the post terminals MK have always used with anything larger than 1.5mm², particularly the live terminal as it then tends to foul the fuse. If I have to fit 2.5mm² in a plug I tend to use Duraplug or Permaplug as they seem to take it pretty well (though not sold on the quality of Permaplug).
Sorry, can't remember - it was in the sixties...
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