Twin & Earth PVC Cables in Light Commerical Building

I visited a Highstreet ground floor building which has plans to be refurbished from a restaurant to a bathroom showroom. The electrical installation has been carried out in 2021 using twin & earth PVC sheathed cables. Because of the Covid pandemic the restaurant owners never opened and the electrical installation is not fully complete with the final fix of the wiring accessories still required. There is no electrical installation certificate. (Final circuits have all been wired into distribution boards). There is suspended plasterboard ceiling throughout.

The new owners are planning to refurbish the restaurant to a bathroom showroom with the intention to utilise the existing twin and earth PVC wiring and get an electrical installation certificate.

Question: Is twin and earth PVC sheathed cable suitable? Their electrician has told them he will not be able to provide them with an electrical installation certificate because cables need to be LSF type without giving them a reason why.

Parents
  • In the UK, whilst BS 7671 recognises that `where applicable, cables need to meet CPR requirements and carry a Euroclass for fire performance`

    the onus for selection of types of cables lays with the designer, consultant, specifier, installer for the installation. as per BS 7671 - Appendix 2 (informative) specifically item 17, the DLUHC `has not exercised these powers in respect of reaction to fire for cables`

Reply
  • In the UK, whilst BS 7671 recognises that `where applicable, cables need to meet CPR requirements and carry a Euroclass for fire performance`

    the onus for selection of types of cables lays with the designer, consultant, specifier, installer for the installation. as per BS 7671 - Appendix 2 (informative) specifically item 17, the DLUHC `has not exercised these powers in respect of reaction to fire for cables`

Children