paulskyrme

Posts: 1364
Joined: 12 February 2003
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Actually, a plasterboard enclosure is one of the options muted it seems!
NAPITPRO,
The potential for the lack of IP rating, lack of intumescent sealing around cable entries seems to have been mentioned, but no answers ae yet?...
So IMHO there are still a lot of unknowns.
As far as TT goes, there seems to be an answer that has already been implied, and this has been around for as long as I can remember, which TBH, is since before I was really heavily involved in this side of the industry, as I recall seeing it in sales literature.
An incomer kit for metal boards on TT has been around for a long time, and there is one member on here who concurrs with me, we discussed it a few weeks ago.
The suggestion that has come up is suitable protection on entry into the unit where the incoming tails traverse the metal enclosure, such as a gland made of insulating material, and the reinforced insulation/sheathing on the "tails" taken all the way to the top of the incoming main switch.
With the incoming main switch being a 100mA s type RCD.
Now as this board, and the associated wiring will be correctly installed, the tails will be adequately mechanically supported (i,e. clipped) for their run, as is required of any run of cable.
Thus the lady of the house hanging her full length fur coat on a hanger on the live tail will not transfer any mechanical load to the actual connection to the main switch, so there is no chance of this being disturbed and becoming detached and contacting the metallic outer of the consumer unit is there...
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