I'm afraid this is another one where despite very sound and safety critical advice the OP seems hell-bent on disregarding everything to avoid an RCD , potentially lethal. We might as well give up on this one...
I'd say ideally it should be recorded right at the origin of the supply in the building as there's a separate part on Schedules of test results for 'zDB'.
But if there isn't a main isolator at the intake it wouldn't be practical with no access to line conductors without removing a DNO fuse...
On...
We did a follow up on an EICR including a CU change where a landlord 'didn't like the attitude' of the previous Electrician. It was an unsatisfactory report and the only RFC for the house had a tested IR of 0.28 Megohms across L-E which he'd given a 'FI' code to. There was also a C2 for one...
In years gone by many of us would feed an additional small CU [say for a shower or outbuilding for example] with 6mm tails, often directly connected in with the existing 16mm tails in the existing CU main switch [a fiddly thing to achieve sometimes :) ]. This was considered perfectly ok but we...
That's exactly the one we always use, excellent bit of kit - although some customers opt for the unit without the heater. In all honesty the relatively gentle air input wouldn't unduly lower the temperature within the house in my view, and you can wire these straight off the nearest suitable...
We install a fair amount of PIV units and the changes they make are remarkable. Often by the very next day customers report no condensation on the inside of their windows, one of the very best benefit vs cost things you can do for a home I'd say. But of course you do need fresh air circulating...
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