Wiring replacement thermostat

[steptoe]

The NICEIC and 5WW's I think though.

I don't care what the NIC say, I am using black for neutral like a normal human being.

havent we always used the L2 as the switch and L3 as the neutral?

why change?

the colour is irrelevant,

 

[ProDave]

I always assumed Blue was used for neutral as although it wasn't in the regs, brown and blue flexes were common, so everybody knew that blue was neutral.
 

 

[Lurch]

havent we always used the L2 as the switch and L3 as the neutral?

why change?

the colour is irrelevant,

I don't disagree with that, but the reason for the original ordering of L2/L3 / yellow/blue / live/neutral was purely colour based. The 3 phase equivalent argument doesn't really mean anything in this context.