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Is there also a cooker supplied from the switch or just the fan? Is the size of cable from the CU to the cooker switch and the link to the fan >4mm? Has the ext fan a fused spur unit in-circuit (with correct fuse size fitted)?

Building control will advise you better on placement of sockets and light switches. The regs are not in line with building control. There shouldn't be much stopping you changing this when you get your certificate. Each room will be different so there may be different ways to conceal the...

This is less complicated than explained - Joat wants the one gang switch at the top and the one gang switch at the bottom to switch on both lights. Yes you need to remove one of the supplies then do a 2 way switching circuit which supplies one of the ceiling roses which is paralleled to the...

I did not suggest that this is an easy job for the unexperienced. Although I briefly answered your question, I agree with breezer that it may be best to use a contractor. The info I gave may help you do some of the labour work, cut the bill down and give you an appreciation of what the...

In what location?

When you remove the socket there may be two cables (with a live, a neutral and an earth conductor in each). If thats the case then the wiring diagram you need is here. here For your lighting wiring, your specialist tools will be determined by the fittings you buy.

So my question is what is the level at which it becomes a defect. 0.0001mA??? and is there a reference in the regs etc for this level?

I agree, but in the case of the lighting circuit mentioned its most likely necessary to run a single red & earth cable from the ceiling rose out to the switch(s) and a single red returning to the ceiling rose.

You'll be adding to the socket circuit earth fault path, its bad practice and not in accordance with regulation.

There were some phase tester screwdrivers which came out a few years ago which showed continuity also (ie hold both ends of the driver and it lights up). If this is the case you'll see it light if you're earthed and you touch it off an earthed part. Apart from that all phase testers provide...

You should get a proper electrical survey done - I guess a rewire is required. Budget £1000ish. In the event of live parts coming into contact with metallic parts on your light fittings there's a problem. The circuit protective device won't open and those parts will remain live. You...

In the perfect world it is the case that there is 0A on the main incoming earth but in large installations there can be a small measurement of current on the main earth (usually below 1A) when measured with a calibrated clamp ammeter. This may be traced through to several final circuits which...

Does anyone know what the max permissible current reading in earth is? If so please provide references.

eh ???

Am I to understand this correctly. You have ... One T&E incoming to the ceiling rose One T&E outgoing from the ceiling rose One single red & E Check there isn't another cable (probably single red) Questions - Do any of the black cables have a red marker tape on them? Do you have a...

There are different types of key but this might help you. Go to R S Components website and look up 'Switch Key Universal Wrench' Product No: 439-3025 Price: £6.31

Make 2 cuts about 2" apart with a hacksaw around the outer insulation - One cuts through the outer sheath only, the other (nearest the end of the cable) substancially scores the armour through the outer sheath. Strip off the outer insulation to the cut nearest the cable end and bend and break...

Take no notice lads. Some like to think being an electrician is a complicated job. I'm here to fix that and they don't like it. Why would a DIYer want references - not unless they want a dissertation. The last thing you think they'd want is an inspector visiting - I'm sure. But I keep...

Not permissible because it is possible to inadvertently fail to isolate during maintenance of the spur supplied lights. ie you isolate the kitchen lighting circuit but the lights off the spur remain live. This is bad practice.

Here's an interesting fireside read ... The History of Electric Wires and Cables (R.M. Black) available from the IEE or Amazon at £55.