The main switch can not be overloaded as the main cut out fuse will prevent it.
Definitely not familiar with it
Is that a similar kind of cable to the DNO feed that comes into the home? In what scenarios would it be used to feed a consumer unit rather than a set of "standard" tails?
HmmmmmThe main switch can not be overloaded as the main cut out fuse will prevent it.
That, in itself, does not explain why it is split-con, does it?This consumer unit is about a 20 metre run from the cutout, so can not be fed straight from the incommer without overcurrent protection.
Hmmmmm
Are you suggesting that, by analogy with the 'tabulated CCCs' of cables, the 'current rating' of a main switch (or any other component/accessory) takes into account the characteristics of OPDs?
If we had a cable with a tabulated CCC of 100A, that would mean that it was deemed that it would come to no harm with 145A flowing for at least 1 hour. Are you suggesting that, similarly, a main switch 'rated' at "100A" is deemed to be safe to carry 145A for at least an hour - and, perhaps more relevant in the case of a switch, that it could safely break a current of at least 145A?
Kind Regards, John
That, in itself, does not explain why it is split-con, does it?
Kind Regards, John
You misunderstand. I'm not trying to 'be clever' but, rather, am trying to learn, because you have suggested/implied a concept I had not come across before.You’re using unicorns to try and prove yourself superior to the regulations again. I will not comment further on this as it’s pointless and just encourages you.
Fair enough - that makes sense. The distribution circuits in my house all use 16mm² or 25mm² singles, but I suppose that split con would have been a reasonable, maybe preferable, alterative.To run a 25mm² you’ve basically got 4 choices. .... Split con is cheaper, smaller, neater, easier to install and has more mechanical strength than tails. It’s easier to terminate than SWA and doesn’t require specific glands etc.
What 10 way consumer with RCBO would you guys recommend?
Why didn't you add it to the lighting circuit?
One comment: it’s easier to make a tidy job if there is plenty of space. RCBOs take up more space than MCBs. If I were you, I’d get a significantly larger enclosure than you need for the circuits.
(I write this having spent the afternoon adding a new circuit for mains-powered smoke alarms to my CU, which was “professionally” installed by a spotty teenage apprentice a couple of years ago. To be fair to the guy he was somewhat limited by the lack of slack on the existing wiring, but the result is a rat’s nest.)
On reflection, maybe it is just me having had a life-long misunderstanding, since it's "not just you". Whilst you wrote:You misunderstand. I'm not trying to 'be clever' but, rather, am trying to learn, because you have suggested/implied a concept I had not come across before....You’re using unicorns to try and prove yourself superior to the regulations again. I will not comment further on this as it’s pointless and just encourages you.
... this started because flameport wrote:The main switch can not be overloaded as the main cut out fuse will prevent it.
Hence, both of you are saying that, say, an upstream 60A fuse would be adequate to protect an RCD or main switch 'rated' at 63A (and flameport is also saying that downstream OPDs with Ins totalling no more than 63A would also offer adequate protection), in all cases despite the fact that the fuse/MCBs would allow a lot more than 63A to flow through the device for an appreciable period.Supplied with 63A RCDs, which are useless unless the installation happens to have a 60A or less main fuse, or the MCBs are configured to have less than 63A of capacity on each one
Nice. I see they also have the two outputs next to each other, which avoids the need to fish around round the back to find the hole for the neutral.
Unfortunately, mine is MK.
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