Twin AND earth is 3 wires, surely?
I am after a cabling spec minimum. I.E., you can use bell wire, or flat speaker cable, or the cable carries 5 amps so it has to be lighting circuit spec.
I thought it was only a switching voltage and current, <2amps and 240v. The ad says it is a 2 wire...
I'm going to fit a Honeywell wired programmer stat to replace the rubbish wireless programmer and stat the boiler came with.
It is a WB Junior combi boiler.
To minimise the amount of channeling in the wall I have to do (it is a 60's build and uses concrete blocks!), what is minimum spec...