AS/NZS 3000:2007 4.10 (Heating Cables) + NZS6110
Posted: Sat Aug 21, 2021 7:22 pm
Hi all,
Im just having a lock down read in reference to Underfloor heating. Does 4.10 (Heating Cables) also include Under Tile Heating? Im guessing it does as its a Cable that is made / installed to produce heat, but can't find any definitions to what is classed as a Heating Cable.
4.10.5 says All heating cables shall be provided with additional protection by an RCD with a fixed rated residual current not exceeding 30mA, and -
(a) - in the case of heating units fitted with a conductive covering, this covering shall be earthed; and -
(b) in the case of underfloor heating units without a conductive covering, an earthed metallic grid with a spacing not exceeding 30mm shall be provided above the under floor heating cable;......
I don't install under floor / under tile heating, but have been on site plenty of times when under tile heating has been installed. The heating cables are usually flexible (From what Ive seen), which I'm guessing would mean that they don't have a conductive cover, which means (b) would apply - but I don't think I've ever seen anyone install an earthed metallic grid above the heating cables of Under Tile Heating
Also NZS6110 - Its referenced in 3000 in the general header in 4.10.1. ESR 59 says that ELV and LV installations are to comply with 3000, but there is no reference to 6110 in the ESR. - How do we know what version of 6110 is to be followed. Im guessing in this case it would just be the latest edition??
Thanks
Im just having a lock down read in reference to Underfloor heating. Does 4.10 (Heating Cables) also include Under Tile Heating? Im guessing it does as its a Cable that is made / installed to produce heat, but can't find any definitions to what is classed as a Heating Cable.
4.10.5 says All heating cables shall be provided with additional protection by an RCD with a fixed rated residual current not exceeding 30mA, and -
(a) - in the case of heating units fitted with a conductive covering, this covering shall be earthed; and -
(b) in the case of underfloor heating units without a conductive covering, an earthed metallic grid with a spacing not exceeding 30mm shall be provided above the under floor heating cable;......
I don't install under floor / under tile heating, but have been on site plenty of times when under tile heating has been installed. The heating cables are usually flexible (From what Ive seen), which I'm guessing would mean that they don't have a conductive cover, which means (b) would apply - but I don't think I've ever seen anyone install an earthed metallic grid above the heating cables of Under Tile Heating
Also NZS6110 - Its referenced in 3000 in the general header in 4.10.1. ESR 59 says that ELV and LV installations are to comply with 3000, but there is no reference to 6110 in the ESR. - How do we know what version of 6110 is to be followed. Im guessing in this case it would just be the latest edition??
Thanks