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On domestic jobs I have found that the crossover test is generally inconclusive on EICRs due to poor connections on sockets and the short length of a spur . Wiggle the plug in the socket and you get different readings - certainly enough that you can't tell whether it's a spur or not.

Worked on the principle that it was the posters house and this was a get around. By the time the LED breaks down I hope that the abominable halogens will be a distant memory! Of course the correct response is to get the builder to do the job properly!

Could always fit LED's to keep the heating effect down.

In theory - theory and practice are one and the same. In practice - they aren't!

I've been looking at this as an EICR - in which case the scenario that is described would be detected. My interpretation of you are saying is that on installation the insulation measurements should be made with the cpc connected to the earth bar. Fair do's. However - without the water present...

Could you detail why this is wrong? Can only think that an interlinked circuit would be a problem - but the readings taken will always be worse case. Perhaps we should be checking for interlinked circuit as an additional test.

Oh Yes!!! Very interested!!!! On an installation N and L are isolated - E is not. Something to do with that?

Is this a bit basic - but there is an on line calculator on the TLC site which is a good start. I'm often surprised how much air flow is needed and how inadequate a lot of installations are.Suitable Fans

I always believed that British Standards should be available free to anyone - that way any interested party could check that a job had been done correctly. BS7671 should be free as a download - and if a bound book is needed then charged accordingly. If this was a good pdf then I could...

I like Hager - but found them to be expensive and wide. Hate MK - I've only fitted two and both times had faulty MCB's. Look nice though. Control Gear was my standard - but can be a pain getting the front cover on due to distortion - particularly with the 12 way. Look much like the MK but...

Why not 3% - surely there is lighting in the barn? I've lost jobs by conforming to this rule - it seems that mostly you can get away away with this as most appliances are very tolerant of voltage variations and the supply doesn't vary to the extremes.

You're probably right - but if that is the method used to measure current I would have a gamble that verification of that element isn't included in a power up self test routine.

I don't do PV - but I'm intrigued by this thread - and want to check that I've got the gist. The way I see it is as follows:- Due to the 150m of 12mm cable there is a volt drop due to the current supplying the barn. So voltage here is less than the incoming voltage when current is being taken...

16k was advertised as "more memory than you will ever need!"

I use a plastic Stanley tool carrier - one side for bog standard tools (Saw, Crimp tool, hammer, chisel, SWA cutter, hex keys etc) the other side for measurement type tools (tape, spirit level, voltage indicator, plug tester, multimeter, marker pen etc) and sundries (choc blocks, insulation...

As always Steps - a new insight! I always envisaged a fault with someone digging the road and shorting a cable to another service - so assumed there would be some fusing somewhere. What you have come up with is far nastier! If I understand correctly what you are saying is that depending on what...

It strikes me that main bonding conductors need to take a fair bit of current to allow for exteraneous currents coming in on say the gas or water pipe. I wish the ESC reflected this - as there is no way to justify increasing bonding conductor size by the cooker fault shown in the ESC leaflet on...

Respect - all that in one day is really heavy! Did that include an EIC at the end - or was the work inspected and tested after?

Of course it was - it was smiling at you!

Sounds like a job with no job satisfaction and inevitably poor customer service and workmanship. Assume all surface mount and domestic butchery for tenants. You will learn something but can't see how all that can be properly achieved in one day. Sparks mate. Suspect you'll be on sockets! I'm...