It is potentially dangerous and despite the pressing appointment it should have been rectified before the electrician left.
Were all of the circuits (lights, immersion, cooker etc) tested? What did the tester look like that he used?
We all have bad days, but I'm surprised that the problem is...
As you suggest it's a volt free contact for the boiler on the UH8. The live for the boiler switch wire needs to come from the boiler so that the boiler isolator disconnects all live supplies to the boiler.
You can parallel up the UH8 volt free contact with the zone valve end switches for the...
In my mind the QS, as the title suggests, should be supervising. For larger jobs they should regularly be on site overseeing the installation and testing. For smaller jobbing type works they should at least be spot checking their electricians work.
As ever, the employer needs to give their QS's...
Currently you'd only need 17th Edition to join one of the competent persons schemes.
Several on here are members of Stroma which is cheaper than the others.
You'll also need insurance, test kit etc.
First one depends on the load that you have calculated for the installation.
Second one I don't agree with. Tails are insulated and sheathed, same as twin and earth...
Edit: Speedy Lee beat me to it!
Your electricians proposals sound pretty fair. In reality it's unlikely that your circuits or submains will ever be fully loaded. For example what would use 60A in the summer house?
Basically, you can run tails up to 3m from the meter position without providing any circuit protection (fuses) so...
Is your new light fitting metal as you don't seem to have any earthing there.
Best thing would be to call in an electrician who can ensure it's safe. Unfortunately relying on the mcb to trip using trial and error is more dangerous than many people realise and could cause more problems.
A freestanding convector heater from the DIY shop is also 100% efficient.
Have you explained that it'll cost more to run than gas? Also, he might find the lights dim every time it cuts in depending on how good the dno network is.
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