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How was the old rose wired? How have you wired the new fitting? Am I correct in assuming the new fitting has only a 3 terminal connector block. What wiring is at the switch? Something doesn’t add up with the number of wires you have – there are some easy explanations but it depends on how...

Ah the perils of writing answers too quickly and reviewing too little. (I’ve edited the original post) Yes, point taken. I meant to say could be. One concern I have with no RCD is if a SWA cable is terminated at a shed/garage in a non insulated enclosure it will rely solely on the...

Three way switching is explained in the reference section. You can also search for the many other posts on the subject.

I think you have problems:- 1) Installing all the cables back to a single location. 2) Getting the install past building control/electrical inspection. It will certainly not look anything like the examples in Part P. 3) Selling the house latter.

How did he measure it?

In theory an arrangement would be similar to:- [code:1] Boiler ----- FCU | | DP Break before make Change Over | | MCB | RCD 30ma Dp Switch | | |...

There are 4 main problems:- 1) You must ensure that the generator and mains can never supply a circuit simultaneously. Although generators can output 230v it would be out of phase with the mains. 2) Earthing. Generators are not tied into you houses earth and effectively operate as” IT”...

Your garage supply will need to run from a separate fuse/breaker in your house's CU and could be protected by a RCD prior to leaving the house. Consider using 6mm or 10 mm SWA cable buried below 450mm deep. SWA cable needs correctly terminating at both ends. In the garage you can run the...

A small portable generator is one thing but linking into your fixed wiring is another - its very complex and specialist work. Buy a small UPS for the PC - it will allow the PC to shut down gracefully. (Most UPS do this automatically too). Torches, Wind up radios, candles, camping stoves...

You mentioned moving the old Cu 6' - do I take it that the 100' and 30' away CU are for supplying garages and sheds?? What matters is not the rating of the CU (I.e. the maximum load they are designed to take) but the real load you are going to run on them. If the garage is never going to run...

A lot depends on what you are doing with the machines. If you are talking about a few wood working machines that all have standard (BS1363) plugs on them and are intended for home/DIY/amateur use then that’s very different from commercial/professional use. In the pro case you need to consider...

Agree 100% with BAS. Its hard to know how anal he is being without seeing your installation. However would you want to risk a potentially problematic job just before a Part P/NICEIC assessment? You should have a periodic inspection every 5 years. It’s a bit like a dental check up every 6...

FCU - Fuse Connection Unit - its a fused DP switch the same size as a single socket - do a search on the site for pictures. An RCD FCU has a RCD integrated into the FCU package. [code:1] CU----6mm ------ FCU(RCD/3a) ------- 6mm ----- FCU/5a |...

You could aways take a trip to Argos and by a new one - then you'd have peace of mind complete with a fitted plug. :roll:

What route does the cable currently take? Does the 6mm go via the attic? If it does you have a few options. If it does not things are more limited. Assuming the 6mm runs into the attic:- Since the power shower doesn’t heat the water it doesn’t need to be on a dedicated circuit. It is...

Metal pipes to the bath taps are considered to normally bond the bath. However there is nothing to stop you using the bath terminal in addition to the pipes.

Ever considered getting a dog?

This is hard to explain. However if both circuits are sharing the neutral you disconnected the only alternative path would be for the current to flow backwards through the lamp, into the live conductor to the next lamp and then through it back to a neutral on the other side of the break. You...

No it is not isolated if you use plastic Push Fit fittings to join Copper to copper. If you test continuity with a meter it may appear to be isolated – however the few mm of plastic is not enough to ensure isolation when full of water with 240v potentially present. See the Hep20.co.uk...

Yes something is very wrong. My immediate instinct is that you have a burrowed/bridged neutral from another circuit. I'd recommend you get the lighting circuits professionally tested ASAP. Who did the partial rewire?