Many 60s, 70s and 80s purpose built flats I have worked in have had new consumers units fitted incorporating RCDs. Often these boards weren't fitted to cover any new kitchen/bathroom/other work. Apparently they were fitted simply because someone probably thought they were out of date.
But in all cases, and I'm talking about different blocks of flats and different contractors, the off peak boards for storage heaters never seem to get changed. So the storage heater wiring is concealed in the wall less than 50mm and no RCD. Also, the wiring isn't in earthed metal conduit, just plastic.
I can't think of any exceptions why off peak storage heater wiring less than 50mm deep shouldn't have to be protected by a 30mA RCD.
I suppose it would be unlikely anyone would be drilling holes in a wall around say 11.30pm-6.30am, or whatever .
It seems everywhere I go, the old off peak boards remain when the main consumer unit is replaced.
Any thoughts on this?
But in all cases, and I'm talking about different blocks of flats and different contractors, the off peak boards for storage heaters never seem to get changed. So the storage heater wiring is concealed in the wall less than 50mm and no RCD. Also, the wiring isn't in earthed metal conduit, just plastic.
I can't think of any exceptions why off peak storage heater wiring less than 50mm deep shouldn't have to be protected by a 30mA RCD.
I suppose it would be unlikely anyone would be drilling holes in a wall around say 11.30pm-6.30am, or whatever .
It seems everywhere I go, the old off peak boards remain when the main consumer unit is replaced.
Any thoughts on this?