- 3 Jan 2011
- Reaction score
I don't think anyone could really argue that the outer conductors constituted a 'earthed metal sheath' (indeed, with split con, it would be incomplete).
I would suggest that if you argued that with the regulatory bodies governig my part of the industry you would fail!
We have the same requirements for earthed metallic sheaths, so if we are seen to be complying with that - why do you think the same design of cable does ot comply on the customer side of the meter?
Don't forget, either, that we are using 3 core cables of the same basic design with 300mm2 cores
(hint the neutral is bonded to earth)
522.8.10 (page 101) : “Except where installed in a conduit or duct which provides equivalent protection against mechanical damage, a cable buried in the ground shall incorporate an earthed armour or metal sheath or both”.
So where does this state that a cable buried directly must have an earthed armour?
Concentric cables compy with ESQCR by having an earthed metallic sheath so why does it not comply with BS7671