time lag switch communal stairwell

[scootknew]

hello, quick question as im having a hard time getting my head around this.

3 story stairwell. 2 way switching on each level for each separate light fitting led chandelier so 6 lamps per fitting or so.

total 3x 2 gang switches (2way) and 1x 1 gang 2 way at the entrance door.

customer wants time lag switches or pir sensor fitted. its all 3 core no neutral. how would connect a 2 wire switch to each point? i assume wago the common and then split L1s and L2s in each terminal? so if press any time lag on any floor all lights come on.

 

[UNG]

No intermediate switches?

 

[scootknew]

none.

its all 2 way for each separate landing.

 

[Timbo]

Use pneumatic time lag switches, 2 wire parallel connection.

Vacuum Time Lag Light Switch | Elkay (400A)

Also available at CEF and Screwfix.

 

[littlespark]

No neutrals, so PIR will be difficult.

Mechanical push button time lag? The big round plungers that push in and slowly spring back out?
what @Timbo suggests above....

Isn’t there another 1 gang at the very top landing?

 

[scootknew]

no im thinking the electronic style. but some may require a capaciator at the light fitting to increase the load or it will fliker, either that or fit halogen lamp instead.

top landing is 2gang switch, one side does downstairs the other just a 1way for light above.

 

[scootknew]

so if using 2 wire what do you do with spare core at the 1 gang switch(3core t&e) for example, its not needed?

 

[Timbo]

so if using 2 wire what do you do with spare core at the 1 gang switch(3core t&e) for example, its not needed?

Stick in a Wago.