Interesting three way conversion to two way and swap for time lag.

[The Ghost]

If your bored or like a challenge I thought (maybe wrongly) this might be interesting to trainees and maybe others. As the title convert three way switching to two way (Sw 2 + 3)

danlers time lag (Master and slave) using switch 2 and 3. Assume you cannot find the junction box. Can it be done? Note we have L in at switch 1, no accessible switch return. I included a couple of photos to give the ---- drawing some context. The switch return (green) is pure conjecture on my part, but it must be something along those lines. There is no switch return wire at any switch.

 

[Leesparkykent]

sw 1 common perm live, strippers through to int, other side of int to junction box, strapped connected to sw3 and Yellow from common sw 3 is SL to lights.

 

[The Ghost]

Yellow from common sw 3 is SL to lights.

Agreed, now you can't (for the sake of argument and practicalities) get to the junction box. So I want to convert this to two way master and slave time lag switch. So usually L and Sw return to master and use two of the strappers for the slave. But the L is at switch one which is being gotten rid of. The answer is a nothing to do with this problem I might add. It is just a mind bender for trainees really, and hopefully they might think it can't be done will have to do something else which I did.

 

[The Ghost]

@Leesparkykent you are missing the two wires in sw 1, look at the grid switch with a borrowed live from the adjacent grid switch you can see two wires in the common.

 

[buzzlightyear]

what a head scratcher, now let me think about it ,not the wiser .

 

[Leesparkykent]

Eh? of switch 1 there is only 1 L feed into sw 1 there is no feed out and the rest of the cables look like an ordinary three way switching arrangement apart from on thing, there is no visible sw. return.

looks like two reds in common to me.

 

[buzzlightyear]

I think I have got it .its gone now.

 

[The Ghost]

Where is the light in your drawing

Just assume there is a light and the L and N go to it. Just concerned with the three way lighting and how it pops the sw. return out.

 

[Leesparkykent]

@Leesparkykent you are missing the two wires in sw 1, look at the grid switch with a borrowed live from the adjacent grid switch you can see two wires in the common.

Yeah I see that, that's where it's picking its feed up from.

 

[The Ghost]

looks like two reds in common to me

Yep that's what I said, so one is the L what do you think the other one is?

 

[The Ghost]

So any trainees out there care to chime in?

 

[buzzlightyear]

So any trainees out there care to chime in?

you could do with a old timer on this one .

 

[The Ghost]

you could do with a old timer

Nah the problem is sorted just thought I'd throw it out there for a bit of light entertainment. Lets just say it's thinking outside the box, or cutting the gordian knot. I just thought it might be good for trainees to have a think about as it's the sort of thing we come across all the time and have to think it through.

 

[buzzlightyear]

Nah the problem is sorted just thought I'd throw it out there for a bit of light entertainment. Lets just say it's thinking outside the box, or cutting the gordian knot.

and I just put the pop corn in the mic/wave .

 

[The Ghost]

I assume it is something like this.

 

[Leesparkykent]

View attachment 42377 I assume it is something like this.

That would of never worked.