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Yeah, I'm not sure where I got that idea from, either. :)

This is the correct procedure, John, but you have to keep in mind - it will only show up the borrowed neutral if one of the lamps that you've left in is the one with the 'borrowed' neutral......so you would use the landing light as one of them (powered off the downstairs light circuit), as this...

Am I missing something - you'ld have continuity doing this whether the neutral was borrowed or not...............wouldn't you?? :?

Sorry, John, out of order to even suggest this. In your engineering logic this might make sense.......but in the real world, of course a ring final with a bridge would be more dangerous. Why? - Because in the real world an electrician has to test that ring final - The first test of...

Are you familiar with the Building Regulations and how they apply to electricians.......not just Part P? Are you familiar with BS7671.2008? Are you familiar with Inspection, Testing & Certification and assessment of the test results? I ask these questions - not because I doubt your...

Hi John, It wouldn't be a problem, as such, because the installation would still have an earth via the 'single core' CPC back to the generator. There are two problems with not 'rodding' the generator, though, which is probably why BS7671 says you should. Firstly, the neutral would...

Trojan, any chance of posting the make and model of the generators - I wouldn't mind having a look at the specs etc. - only out of curiosity. Give us the model of the change-overs you're installing as well........I wouldn't mind understanding this a bit more myself. :)

Sorry, double posted it :)

OK, Trojan, as best as I can........but like I said, I'm no generator expert. :) My BLUE Hope that's helpfull in some way - apologies if I am slightly out on my info, but I don't do a lot of back-up supplies.......anyone with a bit more hands-on, please feel free to correct me. :)

You've got to be kidding. you'ld have to have TWO double socket outlets located about one metre from the CU, both with significant loads on them.............and then the OPs blanking plate/connectors within that one metre of T&E. I assume we're talking about the real world, not the extreme...

I'm wondering why everyone is thinking that 32 A is flowing through the conductors? (i.e. through the OPs connection block) The current through one leg of a ring final is not going to be 32 A - or am I missing something??

How much do you think 2.5mm T&E costs??? 5 metres will probably cost you about a fiver. Do the job correctly, ffs!

The word 'competence' again springs to mind. If the OP has to ask the questions that he has.....on what is essentially a DIY forum - should he be installing back up generators. I'm no expert on generator installation, but even I know the basics. Generators come with three types of...

You can get away with one single neutral bar if all circuits are on RCBOs - so there wouldn't be an issue of connecting a circuit to the wrong neutral bar........like there can be with two RCDs covering a number of circuits each. I'm not following what you are testing for here?? Is it me...

Do you know what's really annoying to electricians when a problem is posed - like this one? We think along the lines of how we would do the job and what will have already been ruled out. So, you see, you're talking about RCBOs not holding - therefore your onto 'live'...

The other thing, of course, is that it's not always lit up as bright as day when your trying to distiguish between colours - you're gonna need to tell the difference in varying light conditions - as said, a bad error could cost someones life. If you're going self-employed, then I suppose it's...

Works the same mate - just pretend one of the inputs isn't there :) - in other words, just use one of the inputs and the two outputs.....pretend this is your two way switch, so 'Input 1' would be your 'common', 'Input 2' would be ignored, 'output 1' would be 'L1' and 'Ouptut 2' would be 'L2'...

Of course, I could be totally wrong and (in the JB), it might just be the 'yellow' conductor is split - with one end connected to the 'red' of the T&E and the other end connected to the 'black' :) Either method works - more likely to be the first, me thinks.

If it's not done at the ceiling rose, then there will be a junction box somewhere. In the JB the 'live feed' will be connected to the 'Red' conductor and the 'switch live' will be connected to the 'Blue' conductor. (or vice versa, it doesn't matter) - the yellow conductor will carry straight...

Did your mate take these three things into account - or did he just say "4mm, 3-core will do"...........just wondered if your taking notice of any advice on here? :)