I was presented with an underfloor heating system which was installed by the tiler.
I was asked to connect it up, and provide the certificate. On inspection of the cold tails, they do not contain a CPC, and it transpires that the heating element does not incorporate an earthed metallic screen, so I said I was not happy to connect it without certainly some more investigation.
The manufacturers said on the phine it was fine to go ahead and connect their product without and provision for earthing the product. I asked for something in writing, and they have sent the following response:
Now I'm still not satisfied that regulation 753.411.3.2 is complied with, and therefore the installation can't be signed off.
The regulation clearly states: "RCDs with a rated residual current not exceeding 30mA shall be used as disconnecting devices. In the case of heating units which are delivered from the manufacturer without exposed-conductive-parts, a suitable conductive covering, for example, a grid with a spacing of not more than 30 mm, shall be provided on site as an exposed-conductive-part above the floor heating elements or under the ceiling heating elements, and connected to the protective conductor for the electrical installation.
There is no mention of it being permissible to ingore the above regulation if the heating element is a class II product.
I am just preparing my reply to them, and wanted to make sure I'm not missing something blindingly obvious.
Thoughts?
I was asked to connect it up, and provide the certificate. On inspection of the cold tails, they do not contain a CPC, and it transpires that the heating element does not incorporate an earthed metallic screen, so I said I was not happy to connect it without certainly some more investigation.
The manufacturers said on the phine it was fine to go ahead and connect their product without and provision for earthing the product. I asked for something in writing, and they have sent the following response:
Now I'm still not satisfied that regulation 753.411.3.2 is complied with, and therefore the installation can't be signed off.
The regulation clearly states: "RCDs with a rated residual current not exceeding 30mA shall be used as disconnecting devices. In the case of heating units which are delivered from the manufacturer without exposed-conductive-parts, a suitable conductive covering, for example, a grid with a spacing of not more than 30 mm, shall be provided on site as an exposed-conductive-part above the floor heating elements or under the ceiling heating elements, and connected to the protective conductor for the electrical installation.
There is no mention of it being permissible to ingore the above regulation if the heating element is a class II product.
I am just preparing my reply to them, and wanted to make sure I'm not missing something blindingly obvious.
Thoughts?