"Paul Roman" wrote in message
...
I notice from the central heating diagrams that 4 (and sometimes 5)
connections need to be made between the junction box and the programmer.
Is there a particular cable for this or is it usually knocked up with a
couple of runs of twin and earth?

Thanks

Paul
Mine (fitted by an electrician) uses a special cable/flex which has lots of
different coloured wires.
HTH
Dave R