3 way switching relay

[pc1966]

I could make it work with a DPDT relay. Perhaps positioned in the roof near the light fitting in question.

Probably need to be to get a neutral, most UK light switches I have seen don't have N, but the trend now is to put it in for fancier switches.

 

[Taylortwocities]

It can be done with standard so-called smart WiFi switches and a bit of brain power. It’s all too modern for me, but this looked fascinating

View: https://m.youtube.com/watch?v=W2pcYp2pPWA

 

[James]

I could make it work with a DPDT relay. Perhaps positioned in the roof near the light fitting in question.
The only such relays I'm familiar with would definitely need to be inside an enclosure, they're not IP rated or touch protected to be loose in the wall/roof and wouldn't qualify as maintenance free.

Although as suggested by @pc1966 it would need a neutral for the relay coil, I think wiring a dpdt relay to mimic the action of an intermediate switch is a creative and an excellent solution to a difficult problem.

These Aussies are not as daft as some of them pretend to be!!

@ElectroChem
Top marks.

 

[Lucien Nunes]

Yes, DPDT relay as the intermediate, controlled by SP 1-way switch, with two 2-ways. The only disadvantage is that the relay coil is sometimes on when the light is off (depending on the 2-way settings) and might be consuming power most of the time.

If there is a momentary (retractive) switch available in the appropriate range, then a European style alternate-action relay, push on, push off is another possibility. The three N/O switches are connected in parallel and the coil only draws power when one of them is pressed. Popular in France, a.k.a. télérupteur.
Télérupteur description

@Megawatt - interesting difference in terminology: UK 2-way = US 3-way, UK 3-way = US 4-way but the 4-way switch itself we call an intermediate. So in US terms the OP's problem is that there is no 4-way switch available in the styling they want.

 

[snowhead]

The simple solution is to put one switch over the centre of the bed (headboard) instead of one each side.

 

[James]

The simple solution is to put one switch over the centre of the bed (headboard) instead of one each side.

Could be like a disco when the headboard starts rattling!

 

[Taylortwocities]

The simple solution is to put one switch over the centre of the bed (headboard) instead of one each side.

Pull switch. Simples!

 

[littlespark]

If appearance isn’t an issue now;

LightwaveRF.
Smart switch that doesn’t require a neutral (but does need a filament lamp as the load rather than LED) in place of bedroom switch. Battery operated remote switches either side of bed, both paired with the wired Master switch.

Other smart switches are available that could do the same job.

 

[acutting]

Pull switch. Simples!

And now we're back at the original problem. Does anyone know of a 2 way pull switch ?

 

[Taylortwocities]

And now we're back at the original problem. Does anyone know of a 2 way pull switch ?

Yes. Just about every lighting pull switch is 2-way. Even Screwfix sell them!

pedant warning. Yes I know DP switches aren’t 2 way, and I expect you cannot buy 2-way pull switches in Poundland. Etc.

https://www.NoLinkingToThis/p/10ax-2-way-pull-cord-switch-white/70874