Cable for wiring nest thermostat

[RobTi]

Hi looking to run 10m of cable through a single brick wall and plasterboard into a cupboard up into attic and then down into boiler, what should I use ?
Thanks

 

[EFLImpudence]

How many cores do you need and for what purpose?

Are you thinking of using the wall cavity?

 

[RobTi]

How many cores do you need and for what purpose?

Are you thinking of using the wall cavity?

No not running through any cavity a single brick wall with plasterboard on both sides this divides a hall and a walk in kitchen cupboard that isn’t used anymore (large American fridge in front blocking it off), so as far as I know this is 12v from the boiler link(wiring centre) to the remote unit

 

[RandomGrinch]

For the 12V cable running between the Heatlink and the Nest thermostat; this cable is often recommended on the Plumbing forum:

0.75mm² 2 Core CY Control Flexible Cable (Cut Length Sold By The Mtr)

Plain copper conductors

www.cef.co.uk

It has occasionally been known for the Nest to suffer from interference issues, hence the extra shielding on this cable.
Personally, I have used some standard 2 core, 0.75mm² mains flex, and haven't had any issues on a 10m run (with a reported 11.09V at the thermostat).

 

[ericmark]

I used Nest Gen 3 because the voltage between heat link and thermostat is only 12 volt, 1 mm² is ample, could be half that size.

 

[RobTi]

Thanks for the helpful answers, I will eventually get round to getting it roughed in, need to ask the son to visit lol

 

[RobTi]

Can I ask instead of a new thread, any problems just using 3 & e for the future, so I don’t need to run cables if it’s ever changed in the future?
Thanks

 

[Harry Bloomfield]

Can I ask instead of a new thread, any problems just using 3 & e for the future, so I don’t need to run cables if it’s ever changed in the future?
Thanks

No reason why not.

I suspect even network cabling would be adequate, but open to suggestions as to why not.

 

[RandomGrinch]

I suspect even network cabling would be adequate, but open to suggestions as to why not.

Probably fine, I would be tempted to double up the conductors to reduce voltage drop though (on a 10m run)?
Although the Nest isn't hugely dependant on the voltage; the connection is predominantly used to recharge the in-built battery and some data Comms to the heatlink.

Can I ask instead of a new thread, any problems just using 3 & e for the future, so I don’t need to run cables if it’s ever changed in the future?

For the purpose of future proofing, you could, but make sure you keep the wiring within the 'safe zones', and anything more than 1mm² wire may be difficult to fit into the Nests terminals.

 

[RobTi]

Thanks everyone

 

[RobTi]

How does this look for a nest with the ability to fit another type of room stat in the future.
flex

 

[Harry Bloomfield]

Probably fine, I would be tempted to double up the conductors to reduce voltage drop though (on a 10m run)?
Although the Nest isn't hugely dependant on the voltage; the connection is predominantly used to recharge the in-built battery and some data Comms to the heatlink.

4x pairs should offer enough scope for doubling up..