replacing a set of light switches in the stair way with PIR switches

[Kaveh]

Hi,

Does anyone know i its possible to replace a set of light switches in a stairway that all control the same lights with a set of PIR switches?
The current rocker switches have L1, L2 and COM but the PIR switch I am looging to replace them with only have L1 and L2.

Thanks

 

[littlespark]

I don't think it can be done this way. Your PIR is a simple one way switch - on or off...
The switch you are replacing is a 2 way... ie, the Com(mon) switches over between L1 and L2

There may be a way of doing this with "Smart" devices.... but employing the services of a local spark will be your best course of action.

This is the same as another recent post concerning stairwell PIR's.
Same street?

 

[telectrix]

what he says ^^^^^. might be possible with some rejigging of wiring. insult a local spark.

 

[Dillb]

You wanting to swap from normal switches to PIRs?

Looking at the new switch it has a limits of maximum switching capacity, how many of what sort of light will they be switching?

 

[MJPD29]

You need a 2 way pir but be careful not to get one which requires a neutral

 

[Dillb]

You need a 2 way pir

A what? Just wire them in parallel.

 

[MJPD29]

A what? Just wire them in parallel.

Its been a long day let that one slide

 

[Dillb]

Its been a long day let that one slide

Haha we all have those moments.

 

[GeorgeCooke]

You could leave the existing switches there and connect the PIR across the strappers.

 

[Kaveh]

Thanks All for your replies, I think I'll get an electrician, thought it be a simple swap out, @Dillb , yes, I want to swap from normal switches to PIRs they'll be switching five 28W D5 fluorescent bulbs.

 

[Deuce]

At work as a simple work around we fitted lights that have an inbuilt PIR sensor in the WCs. We left the original switches in place, although of course they're more or less pointless now.

We didn't even set out to do it that way, we just found a light fitting with the internal PIR when we went out to buy another standard one. It's been a useful upgrade for sure though.

 

[Spoon]

we just found a light fitting with the internal PIR

Any change of a link to said fitting please.

 

[Pete999]

Any change of a link to said fitting please.

Dunno Spoon but there may be a chance if you look hard enough.

 

[Deuce]

Any change of a link to said fitting please.

Without digging through invoices I think it's this one: https://www.amazon.co.uk/gp/aw/d/B01HF1A2K4/ref=psdcmw_10709331_t2_B01HS5R4ZI

Although I see there are quite a few all roughly the same design, 360 degree pir in the centre and leds around the centre.

Another way to do it (if you want a specific light fitting) would be to use a smart bulb controlled remotely via a smarthome WiFi pir.

 

[GeorgeCooke]

How much power does the PIR take 24/7? Maybe 3 watts. When only switching a smallish load such as 16 watts there is little saving over leaving the light on for the 8 hour day. That is before taking into account the initial cost and installation charges.