Can the immersion cause an overload?Does that mean that you'd feel obliged to 'pass' it (1.5mm² protected by B32 or B40) because you did not feel that the immersion was likely to overload the cable?As you have to quote a regulation number now it may be difficult.So what does that mean in terms of how you would treat it for an EICR?
If not, which regulation do you think it contravenes?
434.I don't really understand that. What various things would (s)he need to test if there were no FCU that (s)he wouldn't need to test if there were one? Nor do I really see why it's hypothetical. If you and others really felt that it was not only compliant but also reasonable to run lighting (maybe in 1.5mm² cable - see below) straight from a 32A-protected circuit, without any intermediate fuse, wouldn't/shouldn't you all be suggesting that 'simple solution' for the garage/shed lighting we so often get asked about in this forum? Why would you tell them to buy and install an FCU if you didn't feel it was necessary?The installer would have to test for various things so he would be better off fitting a fuse so I think it may be getting too hypothetical.... So what about the much more real-world scenario, of some simple lighting circuitry (maybe in a garage or outhouse) fed in 1mm² cable as a 'spur' from a 32A sockets circuit without any 'fusing down'? Would that 'pass' your EICR?
I don't think I have advocated the situation.
I am merely trying to answer your (devil's advocate) questions.
Again, it either complies or it does not.Well, there's certainly a debate to be had there, but I can short-circuit the need for it by saying 1.5mm² - which leaves the basic issue (32A OPD protection) still there.Also, 1mm² is not allowed for power circuits or is that no longer a power circuit being a spur without a fuse for lighting.?
It depends on whether the load can overload or not.
If not, which regulation do you think it contravenes?
I just cannot envisage these scenarios occurring.
Who would, when installing a 1.00 or 1.5mm² lighting circuit think " I will fit a 32A MCB for devilment" and look forward to a lengthy argument with someone.