On Sat, 27 Jan 2018 17:58:19 +0000
Vortex12 wrote:

On 27/01/2018 17:21, George Miles wrote:
Is it OK to put my 500 watt frost heater on a lighting circuit?
It's so that the plastic header tank doesn't freeze.
Just count it as 2 amps for calculating the length of 1.5mm cable
allowed?

Igenix IG5005 Frost Watch Convector Heater, 500 W - White
https://www.amazon.co.uk/Igenix-IG50.../dp/B00GB5HHFE

thanks
[george]

How about a flat "terrarium" heater (get from a pet shop or Amazon)
under the tank with a froststat. Only a few 10's of Watts and quid.

Or a 40 watt bulb in a biscuit tin. :-)