Tricky Dicky wrote:

If you follow the wiring diagram John pointed to in the Wiki, then the
colours are immaterial as they all end up as switched lives and both black
and grey should be sleeved brown. The only need for the colours is to
differentiate which core is which making sure the same wire connects COM
to COM, L1 to L1 and L2 to L2. The same applies if you are using the old
RYB 3 core + E.

Richard
It doesn't actually matter if L1 one switch is connected to L2 on the
other. Especially if there are intermediate switches the orientation of
the switches is unpredictable anyway. But since cable with two of the
same colour is not readily available this is an academic point.


--

Roger Hayter