UFH Thermostat cable size?

[wozza]

Hi All,

 

I need to run the thermostat cables for my UFH ready for Saturday when the fitter arrives to wire it all up and commission the system.

 

Is 1mm 3 core and earth suitable or should I use 1.5mm 3 core and earth.

 

The thermostats are Heatmiser Neostat V2

 

Thanks, Wozza.

 

 

Edited December 9, 2019 by wozza

[BotusBuild]

1mm should do - BUT - what do the instructions say? Dare I say RTFM ?

[mvincentd]

My electrician used 3 x 1 on mine (heatmiser neostat v2)

[Temp]

Some Heatmiser stats are 12v and/or use network cable. I've not checked your one.

[wozza]

Hi All,

 

Thanks for the replies, the instructions are of no help, and I cannot find anything online.

 

I called the tech line today and asked if I should use 1mm or 1.5mm cable for the Neostat V2 and the chap said  "err 1.5", but he didn't sound very convincing. 

 

So I will use 1.5mm.

 

 

[ProDave]

No point in 1.5.  In fact I rarely use 1.5 for anything. 1mm 3 core & earth will be fine.

 

BUT some thermostats are indeed low voltage and use network type cable.

 

Post a picture of the insides of the thermostat?

[Temp]

Manual here...

https://www.heatmisershop.co.uk/heatmiser-neostat-v2-programmable-thermostat/

 

.suggests you need 3 core for a switched live system and 4 core cable if it's going to be a "volt free" system. See Page 29 and 30.

 

They also have a "Neohub" if you want to control it with an App.

Edited December 10, 2019 by Temp

[Temp]

7 hours ago, Temp said:

Some Heatmiser stats are 12v and/or use network cable. I've not checked your one.

 

And there is a 12V version of the Heatmiser Neostat V2 so you do need to check which model you have..

 

https://www.heatmisershop.co.uk/heatmiser-neostat-12v-v2-programmable-thermostat/?gclid=CjwKCAiAob3vBRAUEiwAIbs5Tn-Te3MoMzR2y6z_2M3buhzhlOTLZfSWAQc0voIdEAtiZSmLUu5c9BoCNoQQAvD_BwE