3 core + earth for most systems and to any of our wiring centres.
If you need to operate a switched circuit, which may be at a different voltage than the thermostat supply, then 4 core + earth cable.
3 core + earth for most systems and to any of our wiring centres.
If you need to operate a switched circuit, which may be at a different voltage than the thermostat supply, then 4 core + earth cable.