No, not all of us.But we all know we cannot connect DP switches <32A that are not to BS1363 to a 32A circuit...
Some of us do not know that at all.
No, not all of us.But we all know we cannot connect DP switches <32A that are not to BS1363 to a 32A circuit...
There is certainly nothing in the regs that says that only BS1363 accessories can be connected to a ring final (if that's what we are talking about) - and the 'current rating' of a switch presumably relates to the current passing through the switch (in the OP's case limited by a 13A downstream fuse), regardless of the OPD (32A or otherwise) of the circuit feeding it.But we all know we cannot connect DP switches <32A that are not to BS1363 to a 32A circuit... [Dive for cover...]
Kind Regards, John
Goodness - are you still using the BRB?! I take it that you refer to what became 433.1.103 in the BGB and is now 433.1.204 in the current BYB? If so, as I said, it appears to say nothing about ring finals being allowed to supply only BS1363 accessories - or do you disagree?433.1.5There is certainly nothing in the regs that says that only BS1363 accessories can be connected to a ring final (if that's what we are talking about) - and the 'current rating' of a switch presumably relates to the current passing through the switch (in the OP's case limited by a 13A downstream fuse), regardless of the OPD (32A or otherwise) of the circuit feeding it.
[you still using the BRB, too? ] Agreed - but, in any event, that's only to do with the topology of the circuit etc. (i.e. not installing lots of sockets, or originating lots of spurs, at points close to one end of the ring) - it's got nothing to do with the acceptability of connecting a 16A (or 20A) (non-BS1363) switch to a ring, has it?Hi RF. Very wishy washy. Care to guess what the definition of "long period" is in 433.1.5? If the circuit through this switch is to power an oven, is "long period" enough to cook the Sunday roast? Or is "long period" just enough time to warm up a pitta bread?
Dunno.Care to guess what the definition of "long period" is in 433.1.5? If the circuit through this switch is to power an oven, is "long period" enough to cook the Sunday roast? Or is "long period" just enough time to warm up a pitta bread?
I do, because it is an exemption from all the other regulations regarding Ib vs In vs Iz etc.it appears to say nothing about ring finals being allowed to supply only BS1363 accessories - or do you disagree?
2. the DP (double pole) switch will have 4 terminals. 2 for the supply in, and 2 for the load out connection (to the socket in your case).
Here's a description Double Pole Switches & Cooker Control Units - MK Electric
So you would have somewhere to connect your neutral connections.
Why would a DP switch have a terminal marked 'COM' and what would you put in it?Sorry to resurrect this - having now spoken with the manufacturer direct - 16a DP switches are what I need. These have the terminals 'live 1' and 'com' and the manufacturer reassures me that they're normally used for what I want.
Eh? I'll have to test out the new forum's search facility, because I could have sworn that the point I made is one that you have made on a number of occasions in the past!I do, because it is an exemption from all the other regulations regarding Ib vs In vs Iz etc.it appears to say nothing about ring finals being allowed to supply only BS1363 accessories - or do you disagree?
Even when there is a 13A (or smaller) fuse in the current path through the switch?I am sanguine about using 20A rated switches, because 20A is the most that's allowed to be carried by the cable. I have a much harder time with 16A ones.
Only 'for long periods' ... for periods which are not 'long' (whatever!), anything up to the current allowed to flow by the 32A OPD could (seemingly 'compliantly') be travelling through any particular bit of cable in a ring, hence also 'through' (very little, really!) the terminals of anything 'in the ring'.The problem there is what are the terminals rated at, given that they have to pass the circuit current, not just the load. Yes, you can say, with much validity, that they don't have to because the in and out conductors will be in contact, but there's no rigour in that. With 20A rated accessories you know that the terminals must be OK.
I probably wouldn't, but primarily because of the size of the holes into which to (try to) get the conductors! I must say that I've never really understood how the 'current ratings' of things like chock-blocks are arrived at. In terms of current 'going through' the terminal (from one side to the other) I would have thought that the CSA of the brass (or whatever) in a "15A" one would be good enough for an awful lot more than 15A, wouldn't it?Put it this way - if you were using choc-block to create a spur from a ring final would you use 15A rated stuff?
Can't think why not.I was thinking a a situation in which the switch was not 'on the ring' but, rather, interspersed in a spur from a ring. In that situation, and if the switch were only serving an FCU or single socket, would you then agree that a 16A switch would be more than adequate?
I did pluck that size out of the air - TBH I don't know how tight a squeeze it would be.I probably wouldn't, but primarily because of the size of the holes into which to (try to) get the conductors!
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