Old House Wiring Diagrams. Rc red wire power 24 vac rh or 4 red wire jumpered power 24 vac w white wire for heating enable y yellow wire for cooling enable g green wire controls fan on auto the diagram shows how the wiring works. Bare or greenyellow earth.
Ceiling rose wiring older cable colours assuming your wiring uses the old core cable colours ie red live black neutral and greenyellow earth then fig1 shows the most common way your ceiling rose will be connected. The wires would also be covered by the protective outer sheath cable. There is a chance that if your house has these old wiring colours the switch drops may be from a loop in loop out radial lighting circuit done with junction boxes rather than ceiling roses as shown in fig 2.
Each page of the wiring diagram shows the exact wiring for different sections of the control panel.
I have no white wire to hook up to. However your connections may seem a little different on the thermostat itself. Proper handling of abandoned electrical wires. In 2006 amendment 2 of the 17 th edition bs7671 wiring regulations saw a change to harmonise the uk colours with the european cable colours for consistency and to avoid confusion.