Recent content by ADS

says-les said: Steptoe, do you not know what an RCBO is?  It is a circuit breaker that incorporates both overcurrent and earth leakage protection.  So.....an MCB is an RCBO now.........says Les   :innocent  - or do MCBs not offer protection against an earth fault?? What do we bother measuring...

Just to be clear - All electrical work has to comply with 'Part P' and all other relevant parts of the 'Building Regulations' - what may not be required, in this instance, is 'notification' to 'Building Control'. :)

I concede. :-)

But the appliance is on the load side of the DP switch, so any leak to earth within it would not trip the RCD once the switch was opened. PS I wouldn't be sticking 1000 volts through anything, let alone someones appliance B-)

I'll give you that what you suggest is feasible.......but in the OPs scenario, all IR bigger than 4 million ohms - so no leak to earth.

I'm not getting how it matters which conductor it switches first...........nor what a neon has to do with it.

And what regulation would you quote to support these 'Codes'?

Overloading what? What cable is 24A rated?

As the Regs don't take into account the use of a crystal ball.....and what might, or might not, be done in the future...........I think you are going to find it difficult to find a regulation that it contravenes, or a 'Reg Number' to support a code. You have to ask youself, logically, what...

OK then. :) Bonding has nothing to do with fault current travelling down anywhere..............it is to equalise 'potentials' on metalwork, within a location, under fault conditions - i.e. so there is no 'potential difference' between two accessible pieces of metalwork. So, totally nothing to...

No, we have actually agreed before - though you might have to go back a bit to find it. I've even given him the odd 'Like' now and then. :D ---------- Post Auto-Merged at 00:03 ---------- Previous post was made at 00:01 ---------- Where? (And that's not 'sarcastic', I'm genuinely...

Fair enough. :)

If the pipe that re-enters the building is 'extraneous', then it requires 'bonding' - from where it re-enters the building, back to the MET. We're not making mountains out of molehills, it's the Regs............I work to the Regs, does anyone else? I know exactly what the OP is talking about...

You divide the nominal voltage to earth of the installation by the current that you wish not to exceed and then take away the hand to hand impedance of the human body. Your answer will be in ohms. If the measured resistance between the 'conductive part' in question and the MET of the...

It's a piece of metal entering the bathroom - it's either extraneous or not.............you'ld have to test it and see............nothing else has a bearing on 'bonding' it.