Sensor operated lights in HMO

[Taylortwocities]

The pneumatic switches are mechanical, they do not need anything to operate.

 

[Jupiter01]

they do not need anything to operate

Thanks for the prompt response. Just checking that I've not completely missed the point here!
If I have a light switch currently with a single cable as described above (no permanent live), would this be a suitable replacement?

 

[EFLImpudence]

just a single cable is at the switch: Live, switched live and earth. Is that okay? I wasn’t sure if it needed permanent live.

The Live IS a permanent live.

 

[Jupiter01]

Aha. Yes of course!
I can now understand how that is the case.

 

[Taylortwocities]

If I have a light switch currently with a single cable as described above (no permanent live), would this be a suitable replacement?

Yes

 

[ban-all-sheds]

With the pneumatic switches: I think my lighting is looped at the ceiling rose and hence, just a single cable is at the switch: Live, switched live and earth. Is that okay? I wasn’t sure if it needed permanent live.

As EFLI said, you have a permanent live.

What you don't have is a neutral - many electronic switches need one, and of those that don't I don't think there are any which work OK with LED or fluorescent lamps.

 

[Jupiter01]

Thanks for all your help guys. Much appreciated