Damage to the heating cable may occur during disassembly/reassembly and insulation of the heating cable. This applies primarily to different types of self-regulating Raychem, mostly BTV2-CT and KTV2-CT cables. According to IEC 61892, splicing a heating cable is not allowed. But which rules apply to repair? Are you allowed to repair damage in the outer sheath with e.g. a shrink-fitting sleeve with glue? What about the use of vulcanizing tape, which in practice seals really well? This only applies to “fresh” damage. Older damage, where the cable may have drawn in damp over time, must of course be replaced.

Would like a reference to regulations/norms and not just a manufacturer’s installation guide. The following is stated in the Pentair installation procedure: 'Do not perform repairs on a damaged heating cable. Remove the entire damaged part and splice on a new cable length using the appropriate splice kits from Pentair Thermal Management."" Here they say that the cable can be spliced, while IEC 61892 says that a heating cable should NOT be spliced.

This question was originally asked in Norwegian on the trainor.no Forum and has been translated.