What size cable and breaker for a heating system??

[davie25]

Im wiring a heating system on its own circuit.

Should I be using a 2.5 cable with 20A breaker??

Or a 1.5 with a 10A or 6Amp

Heating is of standard load

Cheers

 

[currie123]

Presuming you mean a central heating system with standard gas combi boiler or back boiler etc then 1.5 on a 6amp breaker would be fine

 

[Spazz]

Depends on type of heating

Electric - 2.5 T&E @ 20A

Central Heating - 1.5A T&E @ 6A


The boiler heater should have a power rating on it - do the maths and work it out

 

[Knobhead]

If you have to ask the question you’re not competent to do the job.

Get a qualified electrician to sort it out for you!

 

[Richard]

How are you heating the water? If your talking about the heating controls, then I would imagine its highly likely that a 1.0mm with a 3amp fuse in the switched fuse spur will suffice. However if your talking about an electric boiler, then thats a different kettle of fish.

Rich

 

[nickblake]

1.5mm on a 6 amp breaker , i would like to point out that this type of work is notifiable