Central heating programmer cable 3 and earth

[Paul Dodds]

Hi,
Hope you're all doing well. I have a customer who needs a 5 core cable to the boiler from the wiring centre. At the moment the feed is coming from a 13a socket in the upstairs cupboard through the programmer into the wiring centre and then 3 and earth under bathroom floor and into the kitchen. In order to get the 4th cable they were using the earth. The plumber has obviously put this back to its original purpose but now there's 1 cable too few - line, neutral, earth, call for heat and call for hot water.
Under the boiler is a fused spur for the cooker hood. Is it possible to use this as the feed for the boiler allowing the line or neutral cable to be used for the call for heat?

I hope this makes sense. Sorry I should have taken pictures but thought of posting here with this "fix" after I left!

Cheers

Paul

 

[Midwest]

Still think OP's on about using the 3c & earth cable, i.e. using cpc as a line conductor.

 

[Octopus]

Still think OP's on about using the 3c & earth cable, i.e. using cpc as a line conductor.

I suspect he’s actually done it that way and come here for confirmation he’s done it correctly ........

 

[Midwest]

I suspect he’s actually done it that way and come here for confirmation he’s done it correctly ........

He's not been back since lunchtime. Probably lying down in a darkened room; can't blame him from some of these replies

 

[Toneyz]

If the boiler needs only sw live,N and earth and the programmer is a two-channel stand-alone programmer then could have the existing supply have the programmer there and put an isolator before the boiler.

 

[Octopus]

He's not been back since lunchtime. Probably lying down in a darkened room; can't blame him from some of these replies

He viewed this thread at 5 pm ....

 

[Midwest]

He viewed this thread at 5 pm ....

He had a long lunch.

 

[Toneyz]

He's not been back since lunchtime. Probably lying down in a darkened room; can't blame him from some of these replies

I think we all need this some days.

 

[leo79]

If it's a system boiler and the programmers in the airing cupboard (which I think the op said) then the 3c&e will be fine. L, N, SL & E.
No pump overun needed as the pumps in the boiler

 

[Taylortwocities]

Unless the boiler call for heat circuit is ELV.

 

[Toneyz]

If it's a system boiler and the programmers in the airing cupboard (which I think the op said) then the 3c&e will be fine. L, N, SL & E.
No pump overun needed as the pumps in the boiler

Still, need isolator for the boiler.

 

[leo79]

Still, need isolator for the boiler.

Then you put a triple pole isolator at the boiler