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You will also need a camera to capture the images of those poor people who will waving their hands like mad to get the PIR to operate.;) I really am struggling to see the logic in what you are doing here, surely a standard two way switch would be easier, particularly since you appear to have a...

This is the part I read.... I cannot immediately quote you the regulation but it is frowned upon for any cable to run in the cavity wall. IMHO any cable that crosses a cavity wall should have some form of protection anyway - SWA may fit this. They are different things. One has a fuse and...

Yes JohnW2, but my question was to the OP and my answer to him sought to explain why there might be a difference between his estimate and the actual one. To the OP there will never be any consistency in quotes for numerous reasons. Not least because often the price is what the market will bear...

I'm just trying to stop my neck from straining.;)

You cannot make out the Amp size of the RCBO's or the MCB's on the Distribution Board and can only hazard a guess at the cable size. Either could be wrong. We also don't know how this three phase board is set up - it does seem a very lob-sided distribution of the RCBO's and MCB's at the moment -...

Well for a new consumer unit the whole range of tests should be conducted for the CU itself and each circuit - not sure how many circuits are involved or their type. There is also the time to complete the Electrical Installation Certificate and complete the LABC notification. Then there are the...

Two very important bits you have missed off here.

Everything up to and including the meter is the DNO's everything from the meter is down to you - with the caveat that you are not allowed to touch the meter itself. Most DNO's will fit meter tails from the meter to a 100Amp isolation switch - if you ask them nicely. Then your electrician will...

I used this site to get a quote but I have just realised it is for the old colours - which I assume is what you already have. https://www.tlc-direct.co.uk/Products/SW25slash3.html New colours from online sites and local trade electrical stores vary around the £6 mark - ask your electrician to...

25 or 35mm backbox is up to you - the deeper the better - subject to the building fabric rules. The socket screws form the link between the earth and the backbox.

You will need to speak to your electricity/meter supplier - most restrict the distance between the main fuse and the CU to 3 metres without a secondary fuse. Also you cannot legally interfere with the metre. New cable is around £3.50 per metre - buy it by the metre. Nothing to stop you its...

Ask them to quote you for RCBO's a much better option than a split load.

That fan you have is only suitable for up to 2 metres of ducting - though I would always try and avoid sharp bends whatever the length allowed. You will need a centrifugal fan for zone 1 or 2 either in-line or surface mounted. 12v or 230v not really the issue - don't think there is a best...

Is there a specific reason you are introducing a fused spur into the circuit - if the socket from which you are planning to spur from doesn't already have a spur then there is no need to add a potential fault point into the extended circuit. Your washing machine/cable is already protected by...

Read and understand how your two way circuit works - you should be able to substitute the old colours for the new ones. http://www.diynot.com/wiki/Electrics%3ATwo-way-lighting

The reason for my confusion yesterday was because you keep introducing new elements into the story. Yesterday, I think you started talking about a two way circuit, with a yellow wire mentioned at the switch. Today you have added the bathroom shaving socket to the plot. Hence we are all having...

That is an excellent idea, I did the same for my kitchen. Your proposals clearly support your statement that you are not an electrician. You have the wrong cable size, the wrong RCBO size - it might also be argued you have the wrong cable type. You are also wrong in the fact that you want to...

I think the OP talked about the existing cable inside the house not me - I have removed any reference to T&E outside the house that I asked about re elements etc. Still don't know if the new shed is metal or not though.

Check... amended.