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As the house is between 30 and 40 years old and the existing owners have been there for 20 years with no modifications it would be safe to say the electrical installations is between 30 and 40 years old. Also from your description the installation appears to be of its age. A full PIR would...

If you have not placed your order then look at LED. My recommendation would be Halers evoLED http://www.halers.com/neutral_white_nw/dl_wh_f_nw__halers_h2/24295_p.html - Only use 8W - Brighter than 50W halogen - Come with a 7 year warrantee - Have a 75000 hour life - available in two...

1. It depends, will the EFLI be low enough to automatically disconnect without a RCD under fault conditions? What type of cable are you using? Will the cable be buried less than 50mm in a wall? Will you have a consumer unit in the workshop to provide RCD protection for the socket outlets or will...

The last time (about 3 years ago) I installed some Click (Scolemore) Compact Flourescent Downlights (CF409) the instructions did allow for the fitting to be covered by insulation without clearance and stated this would not create a fire hazard. (I realise the OP has stated that the fittings in...

You have probably worked out by now there are a few people who don't like downlights. However we can't ignore that they are popular and customers want them. I would look at Halers evoLED, www.halers.com. They are good and come with a 7 year extended warranty. There is a Lighting and...

Yes In my opinon it is when you remove the old consumer unit/fuseboard so just the cables are left and replace it with a new one See above No, not really a RCBO has the same characteristics as a MCB, in addition it also has RCD characterisitcs. Is the RCD part of the RCBO provding fault...

I would not expect either case to be notifiable; the guidance that is provided is not that prescriptive. However I would expect some testing to take place, even it was just testing to establish the earth fault loop impedance, checking polarity and verifying that the correct operation of a...

I have no interest in making a deal with you. You obviously feel rattled enough to stoop low enough to attack me on my grammar as you have nothing to useful to add. I merely pointed out that there was no time scale defined as you had incorrectly suggested and probably created unnecessary...

Exactly, I not the one that made the "technical" claims No the cert that will be issued in due course I don't have one, perhaps you can tell me where you got yours? No fact, stealing cars is a crime, waiting a few days to issue a cert is not a crime.

Well you get 25 days to notify, so 25 days to send a cert could be reasonable? Especially if an invoice has not been submitted. No; the point I was making having a cert in the hypothetical circumstances you made up is not going to make any real difference to any legal proceedings. Ah but...

So what? What would happen if the house burnt down during during your works. You still won't have a certificate. If you don't know then don't say "technically blah blah". I lot of people will issue the certifcates a few days after completing the testing. There is no "law" against it!

Unless the front end RCD is a S type then you won't get any discrimination with the RCDs/RCBOs?

Where do building regs or BS7671 give that timescale for the documents to be produced?

I would advise that you stop that, these is a good chance that probe could become live. Guidance from the NICEIC on islolation procedures makes this point http://www.niceic.com/en/account/media/17thpg5.pdf Also have a read of GS38 http://www.hse.gov.uk/pubns/priced/gs38.pdf Also...

So are you saying that you are making yourself part of the circuit, i.e. one probe on a live part and the other probe on your hand?

Depending on the fitting type it could be the lamps (light bulbs). If the fitting is fire rated and looks like a tin can when removed from the ceiling you need to make sure you have fitted light bulbs or lamps that have an aluminium reflector. The aluminium reflector allows light and heat...

thanks for drawing bernardgreen, it illustrates what I have been saying

I don't need to try a dodgy experiment, the paralell path does not "help" trip the RCD it is the reason it trips I don't know what you mean, the point I was making in a ideal world you would isolate both live conductors. Single pole isolation is allowed on TN-S and TN-C-S because N-E will be...

What you are describing is a contrived situation that probably would not exist under normal conditions. The effect of a RCD tripping when Neutral & earth are shorted is usually in a situation where a ciruit or part of circuit has been isolated in a single pole only. This happens when you...

Maybe not, but in the scenario when the circuit on the other side of the FCU was still live and probably with loads my money is on a parallel path back to the tx