Heat Resisting Cable for Underfloor Pump Query

RoyMacDonald · 18 Sep 2010

The instructions for my Circulating Pumps Ltd pump on my underfloor system say to use 3x0.75 core cable with rubber insulation rated at 110 C. minimum. All the cable I can find though in the suppliers I've looked at is rated at 85/90 C.

Anyone know where I can get higher heat resistant rated cable?

MalcofArabia · 18 Sep 2010

I think you may struggle to find anything in flex that is over 85c.

There are single you can get that are are rated at 110c that are used in commercial catering equipment such as the lights you see above serving counters

link http://shop.bsigroup.com/en/ProductDetail/?pid=000000000030138591

Try getting the 85c butyl type cable and use this

link http://www.tlc-direct.co.uk/Main_In...stant sleeve&gclid=CLef8OmJkaQCFd_-2AodTTPWIQ

Though quite supprised that your pump is recommending such an high temperature cable. In fact if you get the oversleeve you can use normal flex with that as the sleeve can reach 155c

RoyMacDonald · 18 Sep 2010

MalcofArabia said:
I think you may struggle to find anything in flex that is over 85c.

Though quite supprised that your pump is recommending such an high temperature cable. In fact if you get the oversleeve you can use normal flex with that as the sleeve can reach 155c

Thanks.

Must say I don't see how the pump could reach much more than the temperature of the water flowing through it. Normally about 40 to 50 C in an underfloor system. The main system pump with 60 C water flowing through it is touchable.

flameport · 18 Sep 2010

Silicone rubber cable is rated to well above 110C:
http://www.centralcables.co.uk/site/main.asp?pid=145

although as already mentioned, why would this be required in this application?

RoyMacDonald · 18 Sep 2010

flameport said:
Silicone rubber cable is rated to well above 110C:
http://www.centralcables.co.uk/site/main.asp?pid=145

although as already mentioned, why would this be required in this application?

Reading the pump spec. I think it must be because the pump is rated to pump at up to 110 C. So they are covering every type of use. Of course you'd never get that in a domestic heating situation.

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Heat Resisting Cable for Underfloor Pump Query

RoyMacDonald

MalcofArabia

RoyMacDonald

flameport

RoyMacDonald

DIYnot Local

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