On Friday, 12 February 2021 at 15:08:22 UTC, Dave Plowman (News) wrote:
In article ,
ARW wrote:
On 09/02/2021 13:24, Roger Hayter wrote:
On 8 Feb 2021 at 17:38:55 GMT, "ARW" wrote:

On 08/02/2021 00:48, Dave Plowman (News) wrote:
In article ,
ARW wrote:
On 07/02/2021 14:12, Dave Plowman (News) wrote:
In article ,
newshound wrote:
That's simply because 3+e is made for two-way lighting

Then it makes no sense to use three phase wiring colours.



Well you cannot just use 3 browns can you?

Triple and earth for two way switch circuits had two reds and a black.
Shows you how old my drum of it is.


Never seen that. I have seen triple red and earth.

And a black core would suggest the intention was to use a neutral?

Could it be intended for looping in a succession light fittings with switched
live from a smaller number of switches being connected between them?


No idea.
I'm not sure either. To follow the convention of the day, if using for
switching two lights, it would be one red and two blacks. I bought it from
a local place that was big on Exchange and Mart. Makes perhaps some sense
for a room thermostat. But only some.

--
*Give me ambiguity or give me something else.
Dave Plowman London SW
To e-mail, change noise into sound.

I suppose all three cores in a triple and earth should have been all red in the past and all brown currently since at some point in two way lighting they are all live/line with the common always live.

Richard