Sensor light

[keniff]

Right here's one for you, I just installed a pir in my hallway to activate the new light as didn't want a switch, but everytime I switch a light on in any other room the hallway pir is being activated! Can't for the life of me work it out it's as if the surge of the other lights is causing it to activate? Any ideas would be great to stop this cheers

 

[TPES]

Disconnect any other feed except the one feeding the sensor and the switch live out, try again

Then connect each feed back in at each room trying your new sensor light each time. I'd say a connection problem.

 

[TPES]

What do you mean by "it's being activated"? Is it just powering the sensor or is it switching the landing light on?

 

[telectrix]

unless it's something silly, no idea. i assume you've wired it correctly. L,N, and SW/L.

 

[keniff]

It's turning the light on! Activating the pir! There's only one feed to it I looped from the lighting circuit to the new light

 

[keniff]

Yeah tel deff wired it ok, took permanent feed to pendant and took a 3 core from there to the sensor for perm live and neutral to the sensor with a returning switch line

 

[telectrix]

sounds like you've fed the pir with a switched L from the light which is activating it. turn all lights off and make sure you got a true permanent L to the pir.

 

[keniff]

Yeah definatly a permanent feed, it's so bizarre gonna try a new sensor I guess when I get to the wholesalers such a strange one

 

[IQ Electrical]

Yeah tel deff wired it ok, took permanent feed to pendant and took a 3 core from there to the sensor for perm live and neutral to the sensor with a returning switch line

If it's wired correctly then it must be some sort of electromagnetic influence affecting the PIR?

What sort of fittings are affecting this PIR?

 

[keniff]

230v downlights and a standard pendant, never had this before, installed loads of them!

 

[Adam W]

Try taking all the bulbs out and operating the switches?
... Except the bulb in the hallway.

 

[keniff]

Iv just disconnected it for tonight was doin my head in I'll try all your suggestions tomorrow thanks guys

 

[keniff]

Just a quick update, put new sensor in and it's fine! Strange one but it's as if any other load on the circuit being introduced and the light would come on, anyway all sorted!

 

[telectrix]

damn the chinese!

 

[MarkieSparkie]

Are using compact fluorescent lamps on the PIR in particular or elsewhere in the installation, if so the problem is likely to be switch bounce transients triggering the PIR into manual override. Check with the PIR manufacturer for their recommended solution. However, usually a 4uF capacitor across the L&N at the PIR solves the problem.