Electrical

We have som lighting fixtures installed in Zone 1 and 2 offshore, the fixtures must be installed with an isolator sleeve to separate fixture from structure to avoid corrosion. The fixtures are only earthed by supply cable inside the fixture housing, only using PE-conductor.

Is it a requirement to have separate equipotential bonding to structure?

The fixtures are series connected, if a PE-conductor loosens in one fixture, then alle the other fixtures in the link will loose earth connection...

The user manual from the supplier states: "Installer should earth the unit separately – an internal and external earth point are provided as standard at each end of the luminaire"

Thank you for answering.

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

Hello. I know that equipment in Ex areas must be ATEX approved, but there are some requirements for the type of cables that can be used in Ex areas. For example, can IFSI or PFXP cables be used in these areas.

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

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.

Is it allowed to replace components inside Ex db enclosures with “similar” equipment if components have gone out of production, or do you need to recertify the enclosure using a Notified Body?

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

Is it allowed to use twin-ferrules to connect two conductors to the same terminal inside an Ex e junction box?

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