Manual override and PIR on lights

Bradley6969 · Feb 22, 2019

Hi what’s difference between 1 way and 2 Way Switch please on manual override of pir
1 Way, Switch up is PIR and Switch down is perm on
Can someone explain how would the 2 way would work and is the drawings correct the load cable for the lights is from PIR as easier than wiring from switch thanks

Spoon · Feb 22, 2019

The second drawings doesn't look correct. The Switch Live for the first switch looks like its going to the supply. Switch 2 will act like switch 1 in the first pic.

Ignore above... Brain fart moment..

littlespark · Feb 22, 2019

The first drawing is simply an override of the sensor. The live to the sensor is always there and will always work.

The second drawing has an isolator for the live so there is a way that the sensor will not work at all.

2 gang switch, not 2 way. That’s something different.

Bradley6969 · Feb 22, 2019

littlespark said:
The first drawing is simply an override of the sensor. The live to the sensor is always there and will always work.

The second drawing has an isolator for the live so there is a way that the sensor will not work at all.

2 gang switch, not 2 way. That’s something different.

Thanks I take it 2nd picture is not correct?

123 · Feb 22, 2019

Would be easier to just use a 3 position switch so you could have the lights on sensor, lights off or lights on

Bradley6969 · Feb 22, 2019

123 said:
Would be easier to just use a 3 position switch so you could have the lights on sensor, lights off or lights on

So my first drawing just with a 3 position switch?

Bradley6969 · Feb 22, 2019

So the 2 gang, switch 1 will be power and isolation and switch 2 will be either perm on or cell how would I wire this?

Jay89 · Feb 22, 2019

I put it on your last post

Bradley6969 · Feb 22, 2019

Jay89 said:
I put it on your last post

Yes for a 3 position switch not 2 gang

Bradley6969 · Feb 22, 2019

This one better?

Bradley6969 · Feb 22, 2019

Sw1 off I mean

Jay89 · Feb 22, 2019

Jay89 · Feb 22, 2019

Out of interest, why don’t you want to use a three position switch

Bradley6969 · Feb 22, 2019

Jay89 said:
Out of interest, why don’t you want to use a three position switch

Sorry I’m only apprentice, I just want to know the different ways as we came up to a job this week where the customer wanted something similar

littlespark · Feb 22, 2019

There's 3 ways to do it.

Switch on the permanent live. This means the light can be turned fully off. Turning on the switch supplies power to the sensor, which in turn turns on the light when it detects something.
Common when you are replacing an existing light with a sensor version.

Over ride switch. Power is always on to the sensor - meaning it will work when it detects something, and will never be able to be switched off.

Combination of both of these. So the light can be always OFF, always ON, or sensor controlled. This can be done by a 3 position switch, or a combination of 2 x 1 way switches as per your diagrams.

It is the specification of the customer or the job in hand, so there is no right or wrong way out of those 3 options.

Also, there are some sensors that operate an override if you flick the switch on-off-on within a second.