I'm installing a PIR floodlight. For convenience, I want it to be switched by a two-way switch, to either permanently on or PIR- controlled. The PIR is already mounted on the lamp unit. Given past poor experience, I'm not interested in one controlled by either pulsing the switch to change mode, or by X10. The circuit is simple enough, it just needs an extra core, but what's best practice in cabling this? In particular, colour coding the conductors?
The cable will be simply clipped to the inside of the conservatory - outside lights have their own circuit, with separate RCBO. I have T&E, twin brown & E, also some 1mm^2 3-phase in brown, black, grey + E. Using the 3 phase seems simplest, would this be acceptable, with the use of blue & brown sleeving to indicate the neutral and the two phase conductors (switched #1 and switched #2).
Thanks