Repairing insulation

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.


    - Andy.

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.


    - Andy.