Yes, table 52.3 says minimum CSA for conductors and lists different types of circuits. That table says the minimum csa for lighting is 1.0mm but nowhere does it say that 1.0mm can only be used for lighting applications.
Agreed. Whilst there are obviously some people for whom it is not an option, and given that we should not suggest deliberate non-compliance with regs, one could suggest that this seems to be a very stupid regulation which is screaming out to be ignored/broken!No but it says minimum for power is 1.5mm², and if a boiler is not lighting then it must be power. It's not signalling or control for sure. Don't get me wrong, I think it's a ludicrous reg, I've said as much this week on the forum. If they're both protected by a 6A MCB, what's the difference? The load on a boiler circuit is probably less than a lighting circuit
Indeed, but I suppose someone would probably try arguing that since it was clearly not a 'lighting circuit', someone might try using it to supply a much bigger load at some point in the future. However, I personally really don't think that one should have to make provision for possible idiotic and non-compliant things that might conceivably be done by someone in the future!You're entitled to list it as a deviation from 7671 and I think anyone would be hard pushed to tell you it was unsafe to feed a boiler in 1mm
Yes. In that case I wonder why you raised it in your list of things to further worry the OP about!I think anyone would be hard pushed to tell you it was unsafe to feed a boiler in 1mm
1mm² used for the central heating
That's not really an argument against it, is it?You must remember that nowhere else uses 1mm^2.
You can always use flex.The other argument is that it is easily fractured, although that risk still exists with an undefined lighting circuit.
Exactly - so it is meaningless.To me a lighting circuit is one used predominantly for lighting but does not preclude fans/shaver sockets/smoke detectors being connected to that same "lighting circuit".
Indeed - and, assuming it's done sensibly, why not? A circuit with a certain current supplying capacity is a circuit with a certain current-carrying capacity, regardless of the nature of the load.I remember back in the early days of the 15th, fitting anything else to an immersion, cooker or shower circuit was discouraged, but these days you find security lights or loft sockets run off immersions, extra sockets run off cooker circuits and fans off shower circuits.
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