The minor diameter of a 4BA thread is only 2.8mm, which is why, in practice, re-tapping as M3.5 (major 3.5mm, minor 3.0mm) works reasonably well.Wrong. 4BA Are 3.6 mm diameter which is bigger than 3.5mm. My post stands, you need to get 4BA screws.
That would probably be more iffy, since the minor diameter of an M3.5 thread (3.0mm) is greater than that of a 4BA one (2.8mm).... but I've done it the other way round though, re threaded. 3.5mm to 4BA.
What did you do about certification, testing, and Building Regulations compliance?Thanks everybody for your replies and help. I ended up rewiring the whole appartment which involved drilling the walls for cables and drilling socket holes too and changing fuse box.
And what heights and regulations would those be?Moving all points to comply with new height regulations.
Well - I hope you actually wanted those heights anyway, as you were saddled with an ignorant electrician. You did not have to have them at that height, there are no laws or regulations which say you had to, and nothing whatsoever to stop him certifying the work. What a clown he is.I was tempted to just rewire with existing sockets in same place but because i wanted some doors to open the other way i decided to go the whole hog. Also electrician would not give me a cert in this case. Opted for 45cm from floor for sockets and 120cm for switches.
At least if i want to sell i will have a compliant cert and dont need to pretend that i bought in as it appears.
Which says that you did the rewiring, you changed the CU, you moved the accessories etc.I ended up rewiring the whole appartment which involved drilling the walls for cables and drilling socket holes too and changing fuse box. Moving all points to comply with new height regulations. New light switches. Even moved light switches to accomodate new doors opening the other way. New lights to be put up soon.
Indeed, there seems to have been a lot of confusion on this issue. First, the heights which some electricians and some council inspectors try to insist are mandatory are, in fact, merely guidelines in the approved document, not absolutes.Well - I hope you actually wanted those heights anyway, as you were saddled with an ignorant electrician. You did not have to have them at that height, there are no laws or regulations which say you had to, and nothing whatsoever to stop him certifying the work. What a clown he is.
Some of those who cannot read might well be pretty "dim", too.There are none so dim as those who will not read.
And on this particular issue, there are those who seem to read what isn't there.
"Must be no worse than existing," is a phrase quoted a lot, but nowhere in the regulations does it say any such thing.
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