Useing PIR switches in parallel

[jog]

I want to extend the detection area of PIR to operate a single light.

Is this safe?

I have asked this question of a 'shed' helpline twice. I have been told :-

'yes' once 'no' once

So I come to 'those who know' for advice :-))

[garryb59]

Yes, this is perfectly safe - at least it was when I last posted here, when I asked the same question :-) I installed two PIR detectors[got these from wickes I think] in parellel situated at either end of an dark alleyway which then switch a single light in the middle of the path. Works a treat.

Garry

[brugnospamsia]

Probably - especially if they are identical use an electromechanical relay.

I've done the opposite and operated a second light from the same PIR :-

(15kb)

I find it convenient for the 150 watt PIR floodlight outside my front door to switch on the hall light to make it easier to reset my burglar alarm. Inside I can switch either light on manually.

Jeremy

I hereby swear this job was done before 1st Jan 2006 ;-)

[Dave Plowman (News)]

I'd say it would depend on the type of PIR. If it uses a relay to switch the lights, it will be fine. A solid state 'switch' - pass.

[Mike]

Depends on the PIR. But most are and if you are looking at two of the same brand I think you can assume it okay.

[Lurch]

On Fri, 4 Feb 2005 17:45:54 +0000 (UTC), jog strung together this:

Yes, assuming you're using some 'of the shelf' PIR's from a wholesaler or similar.

[jog]

Thanks to all who replied. All say yes which seems conclusive :-) Thanks again.

[Mike Harrison]

...and you can usually tell what it uses from the power rating - if over about 500W it is likely to be a relay.