However, you haven't commented on what was probably my greatest implied question - i.e. if a particular installation is considered to be 'acceptably safe' (in 2020) if it were installed in, say, 1994, how can exactly the same installation be regarded as not 'acceptably safe' (in 2020) if installed in 2002, 2009 or 2020 - or, conversely, if it is considered to not be 'acceptably safe' in 2020 if it were installed in, say, 2002, 2009 or 2020, how can exactly the same installation be regarded as being 'acceptably safe' (in 2020) if installed in, say, 1993?
You are correct, in essence the code C2 has nothing to do with when installed, or what BS 7671 says, yes a C3 may reflect what BS 7671 says, but not the C2, and not even sure about C3 due to the removal of code 4 it seems we are not considering what BS 7671 says should be done with a new installation, all we are considering is the safety of the existing installation.
My problem which at the start I did not consider, is where the opponents of a building have reduced mental capacity. As a result we may have special needs, so I am considering my mother who with poor eye sight macular degeneration and alzheimer's disease, put an extension lead in a bucket of water because she thought it was on fire after seeing the neon.
So in a private home I was free to have house rewired and RCD protection installed, but if the home was rented, what should be done? Be it a child or adult we have not just ordinary persons, and the landlord has little control over the health or behaviour of his tenants.
Attitudes and methods of looking after the old have changed, the idea of the care home which to be frank the waiting for god one is one of the better homes, seems to be now last resort, we try not to institutionalise people if we can help it, so the home needs to reflect the changing needs, wider doors, stair lifts are easy to see, and install if required, but we note radiators without covers, but the electrics don't seem to be inspected so carefully when social services decide if the home is suitable.
So be it my 14 year old son who got his amateur radio licence, or my mother with alzheimer's disease, I have wanted RCD protection in the home.
So the big question if looking at safety, and not compliance, then can one pass a home today without RCD's fitted? So we have the ShockGuard lamp holder that automatically shields contacts as soon as lamp is removed, should these be fitted to lamps lower than 2 meters from floor? I had two shocks as a boy, one from tape recorder, and one from a lamp holder without a bulb in it. So why should I want all bulb holders not on ceiling to IP2X or better?
In other words as soon as we say we are not using BS 7671 to decide what passes and what fails, we start to use risk assessment, and could even fail some thing which passes BS 7671:2018.
OK personally I would say as before to any edition of BS 7671, that is reasonably safe, and if there are special needs, then these are over and above that requirement in the same way as not all house fitted with stair lifts. It is up to social services to stipulate extra protection when required, as to if you trust them is another thing, I had one wanting bits of plastic put into socket outlets, I said only if marked BS 1362, and she could not find one so marked.
The new law should have never used the existing EICR, it should have been designed specially for rental homes, not even saying property as the home is some thing special.
After my mother dropped the extension lead in the bucket of water it was apparent the house needed rewiring as the 1954 wiring would not work with a RCD. She went into hospital and then a care home while deciding what was next move, and I had the house rewired, from deciding to do it, to being completed it took 11 weeks, mother was away for 12 weeks I had a week to spare, not 28 days, 11 weeks. Yes the actually rewire was done in a week, but once I found some one it was not OK I will start tomorrow, and no one is likely to find an electrical firm who can do repairs that fast.
Even my own house, first week I found a second fuse box hidden in ceiling, I knew it needed moving ASAP. However it was 6 months before it was actually moved, and upgraded to all RCBO.
My car MOT runs out in November, I will not get it tested until October, or I will have to get it done earlier next year, so 1st April 2021 we know there will be 1000's of EICR's due, there will be so much work required even if inspected to 1992 standards, and there is no way in the world the repairs can be done in 28 days.
I see adverts "EICR from £79" could not even do a caravan properly for that. I remember my first PIR as it was called then, for the exam we had a board, it took an hour to test a 1.5 meter square board, at that rate allowing for minor repairs unlikely to do more than a house a day, and your not going to start one day and finish the next, so would expect a days wages what ever size until it has to be split into sections and a section per day.