2 wire thermostat question.

[IJWS15]

We are fitting wardrobes to an 80s house we moved into last year. Having removed the ancient ‘robes there were four cables running down the corner of the wall.

One coax which is redundant.
Two twin & e which are redundant

And….. one twin and earth which is the supply to a room stat. OK but…. It is a three wire thermostat and they have used the earth cable as a phase conductor….

Could I fit a two wire thermostat to avoid having to run triple & earth?

Is thre anything I need to look out for if I do?

 

[IJWS15]

We decided to run triple to future proof

 

[Harry Bloomfield]

Could I fit a two wire thermostat to avoid having to run triple & earth?

Older electro- mechanical thermostats, needed L + N + switch wire. The neutral was needed, to improve the thermal response of the thermostat.

 

[Stuckinarut]

Yes, you could have used a hard wired battery operated thermostat.