There is no mention of the fire rating of the enclosure even if it is made of standard building materials, say wood.
I think you must have a very different version of BS 7671 to me - in mine 526.5 specifically says building material when used as an enclosure for a termination or joint must be "non-combustible when tested to BS 476-4." All the other options refer to electrical enclosure or accessory standards - which I believe usually include a glow-wire test or something similar.
By PVC I was really referring to the cables, particularly sheaths, which are inflammable if PVC.
But plain cables don't include joints. Yes, I beleive that any joint - even a crimped one - will be on average less reliable than the original unbroken conductor - but provided the attendent risk of overheating is dealt with (by a suitable enclosure for example) then there's no reason why joints shouldn't be acceptable.
There is no mention of the fire rating of the enclosure even if it is made of standard building materials, say wood.
I think you must have a very different version of BS 7671 to me - in mine 526.5 specifically says building material when used as an enclosure for a termination or joint must be "non-combustible when tested to BS 476-4." All the other options refer to electrical enclosure or accessory standards - which I believe usually include a glow-wire test or something similar.
By PVC I was really referring to the cables, particularly sheaths, which are inflammable if PVC.
But plain cables don't include joints. Yes, I beleive that any joint - even a crimped one - will be on average less reliable than the original unbroken conductor - but provided the attendent risk of overheating is dealt with (by a suitable enclosure for example) then there's no reason why joints shouldn't be acceptable.
