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Posted By Topic: floor heating

Jun 14 2015 17:24

Does under tile floor heating require any sdoc and can anyone install it? Had a customer ask if they can buy a diy kit and lay the heating element under the tiles themselves.

Jun 14 2015 18:01

Yes it requires an SDoC.

The element is an electrical fitting, and installing a fitting intended to be connected to conductors is PEW.
ESRs Sched 1, 1(1)b)

So no they can't install it themselves.

Jun 14 2015 18:42

Doug, I disagree with you about undue tile heating elements requiring an SDOC. These types of heaters are specifically mentioned as excluded in both the medium and high risk definition.

Also as long as the homeowner followed ECP51 and arranged for an inspector to test and make the final connections he could also do the installation.

Jun 14 2015 19:06

Ok so they seem to be excluded from the DMRA list for room heaters. So I wouldn't know which classification they may come under.

I was basically going on the fact that suppliers do have SDoCs for their elements such as the link below.

ECP51 would be fine to a certain extent, however certifying something you can't see and or didn't see being installed could be problematic. Also as soon as the homeowner gets the tiler to do it, then that wouldn't apply.

Plus, Acltd was asking as the electrician on the job - wouldn't be very practical for the owner to have to get an inspector for one item.

Jun 14 2015 19:24

Im pretty sure Under Tile Heating falls into the Appliance category, and that anyone can install it, just not connect it up
Most of the major brands seem to have sdocs available

Jun 14 2015 20:41

There 2 types of product for floor heating each has different rulings on what is considered PEW.

The first type is a appliance the standard quoted on the SoDec will be IEC 60335-2-96 (from memory). The installation of the element is NOT PEW.

The second type covers the single core elements to a number of IEC standards and to install this type is PEW, as you have to make a joint from the floor element to the cold tail to the building.

The NZS 6110 standard indicates where the PEW starts for the above types of element.

All installation wiring from the underfloor element cold tail (both types) to the via a isolating switch and thermostat to the switchboard providing the supply is PEW.

Jun 14 2015 20:44

Just found this on the warmup site:
Note • Your Warmup Heating element has been classified as an electrical appliance. • You are therefore not required to be an electrician to install the element. But all electrical connections including the connection of the controller must be undertaken by a licensed electrician. • Ensure all electrical supply circuits to the heating elements are protected via a RCD (Residual Current Device) protected circuit. • Once the heater and controller have been installed and the tile adhesive has cured, the heater can be switched on.
So it looks like they are calling it an appliance to get around who can install the element.


Jun 14 2015 21:14

I don't know why they have issued an SDOC for there heating elements as they are specifically excluded from the DMRA classification.

Cut and paste from Room Heater definition on ESS web site.
but does not include—

(d) an air-conditioning appliance;

(e) a heating system that is intended to heat the atmosphere of a room primarily by raising the temperature of any floor, wall, or ceiling area; or

(f) an under-carpet heating system.

As far as the installation of the things I guess that the scenario is that the electrician "supervises" the tiler as he does the installation and then makes the required connections and test it all prior to livening because I for one would not want to be installing any under tile heating system. My tiling skills are quite poor and I charge to much.


Jun 15 2015 09:36

Surely no harm in issuing a voluntary SDoC for non-DMRAs.
After all, what a SDoC does is provide some assurance that the item complies with the stated Standard(s).
Just what every careful consumer wants, and might persuade them to buy this type rather than one that doesn't provide compliance documentation.

Jun 15 2015 21:17

so again we have possibly householders, tilers or tame monkeys installing electric elements and we get the job of accepting full responsibility and of signing our life away with a COC and ESC.. would the COC and ESC cover the Appliance side of the connections?????

Jun 16 2015 08:54

If you don't like it, and you did not do the work or supervise it you can always refuse to connect it and specifically exclude it from the Scope of the COC.
The customer might not like it but you will not be breaking the law.

Jun 07 2017 22:32

sDOC is really important for installing floor heating equipment, and a professional would be required to install the equipment. But they are available with all kind of room heaters.

Gas Central Heating