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when 2-way is loop-in method at switch what goes where at switch? there is L+N coming in and L+N going to next switch,switchwire and neutral going to light and a 3-core between switches,how does it all go together at switch please.

Hello bekopper,

As far as the neutrals go. Just join both of the neutrals together in a strip connector inside the switch box.

COM red or brown from 3 core

L1 yellow or black from 3 core. And live in from twin cable

L2 blue or grey from 3core. And live out from other twin cable.

Make sure that the 3 core sequence is the same at the other 2 way switch or it will not work properly!

Good luck

Markysparky that is very well explained

I once asked a mate that is a sparks and he pulled out a piece of paper and drew some lines and broken lines. I was like "oh right now I get it, thanks for that":

I had to look in a DIY book when I got home

Then once I asked him how a MCB works and he drew another diagram of lines and wigly lines this time. Now I don't bother asking him anything

Like the cartoon honeymonster. Hope you aren't trying to say anything?