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.

 

[buzzlightyear]

I assume it is something like this.

That would of never worked

try again ,Vort.

 

[The Ghost]

Well maybe not.

Ok if I go with the idea the yellow is the sw. return which was my first thought. Where does the mystery wire go? Maybe it is another feed to another light. But anyway the thing is, is it possible to do away with the first switch and run a master/slave time lag. And by the way at the light fitting it is a red cable as the sw. return. I know this is all a bit silly as I said just a bit of fun.

 

[buzzlightyear]

keep trying ,Vort ,it will come to you ,god loves a trier .

 

[AJshep]

It's late and I've had a few birthday beers tonight, but my thoughts are to run 2 masters rather than master and a slave.

Doesn't look like you have enough wires otherwise.

Does the live out (red) go to an Em light ?

 

[The Ghost]

Does the live out (red) go to an Em light

Sw 1 picks up its L from the adjacent grid switch, which is a fish key switch for the emergency lights with a separate supply to the emergency lights on the same circuit. If you switch off the fish key switch emergencies and lights on stairs go out together. Any yes it is a bit late to think this through.

 

[The Ghost]

2 masters rather than master and a slave

In order to run anything you would have to have a live and switch return. If I do away with sw. 1 there will be no live at sw. 2 and sw. 3. Anyway I had hoped some trainees would seize on this and lead the way. Shame they have not. I really don't want to make everything too obvious.

 

[The Ghost]

keep trying

Bit of input here @buzzlightyear would be appreciated. Give it to me baby.

 

[Wilko]

I've only got one thing to say ... no, not even one ...

 

[The Ghost]

Anyway I'm done for today can't even spell correctly. Or think, time for a steel bottom I'd say.

 

[The Ghost]

Anyway the two way switching is not the issue and is a complete red herring which I did not want to say but there I've blurted it out now as I'm getting tired. First off the whole of the two way switching would be disposed of. For a master and slave or master and master you only need two cables. Just a clue to the clueless.

 

[The Ghost]

Doesn't look like you have enough wires otherwise.

I think that is the best analysis so far.

 

[AJshep]

If your getting rid of switch 1 you could just join the lives through or Wago to give you a Perm live switch 2.
Although i didnt go into detail i meant to say It's easy enough to get a Perm L and Switch wire at switch 2&3 with what you have.

Old skool time lag switch wiring ?

## edit just saw you posted.

 

[The Ghost]

Perm live switch 2

Agreed, so make that the master. Now I have two wires going up to switch 3. And need to find the sw. return.

 

[AJshep]

The yellow must be the switch return else it wouldn't have worked originally
so switch 3 will have yellow in L1 with the blue strapper (that gives you a switch L at switch 2)

At switch 2 put the other strapper in with the Perm live ( this gives a perm live back to switch 3.

Your end up with a spare unused strapper at switch 2 from switch 1.

Switch 2 Perm L and Switch Live
Switch 3 perm L and Switch Live
2 master time lags, but I don't believe your be able to use a master and a slave as dont they use signal wires ( I haven't looked at specs) ?

 

[The Ghost]

If I remove the L at sw. 1 the circuit is completely dead. Sw. 3 yellow in common may (sensibly) be the switch return. What then is the other red in sw. 1 common? As I say we do not really have to worry about the two way/intermediate switching as it would be redundant. Master requires L and sw. return. Slave requires L and signal return to master (two wires) If I use switch 3 I still need a L and Sw. return. I am still thinking about your proposal with the way you say to do it. But at the moment it's like that film where the chalice in the palace is the lotion with the potion etc. (Danny Kaye I think)