Outside light turns on by bathroom light.

[Stephenmunt]

Hi guys, medium to beginners experience in electrics.

I placed a 250w security PIR light outside. I connected it to the inside first-floor lighting off a junction box in the attic. I've noticed that when I switch off my bathroom light at night that the security light sets off. Any advice on how I can prevent this and also out of interest why this appens.

Thank you

Stephen

 

[Stephenmunt]

Hi guys, medium to beginners experience in electrics.

I placed a 250w security PIR light outside. I connected it to the inside first-floor lighting off a junction box in the attic. I've noticed that when I switch off my bathroom light at night that the security light sets off. Any advice on how I can prevent this and also out of interest why this appens.

Thank you

Stephen

Also to add that I can turn the bathroom light on and off quickly but that doesn't seem to set off the security light. Only when I turn the bathroom light is on for a while and then turn it off and then sets off the security light. Also to add to explain myself better the bathroom light cable in the attic is on the same line as the security light outside.

 

[OnlQQker]

Where is the security light positioned, is it up high above the bathroom window, or down below somewhere else completely?

 

[Stephenmunt]

Where is the security light positioned, is it up high above the bathroom window, or down below somewhere else completely?

It's on the other side of the bathroom wall. I would say about 60cm below the bathroom lighting wires

 

[littlespark]

Is the bathroom window in sight of the PIR sensor?
The sensor may be confusing the bathroom light going off with movement.

Can you turn the PIR away if it’s adjustable?


250W sounds rather large.
Is it an old halogen fitting? Second hand? It might be faulty.
Modern LED types are much less consumption. 50W would be considered big for a standard garden.

 

[Stephenmunt]

Is the bathroom window in sight of the PIR sensor?
The sensor may be confusing the bathroom light going off with movement.

Can you turn the PIR away if it’s adjustable?


250W sounds rather large.
Is it an old halogen fitting? Second hand? It might be faulty.
Modern LED types are much less consumption. 50W would be considered big for a standard garden.

No the window is on the other side. It's a new one. I mite try an LED to see if that solves the problem then. Thank you

 

[DPG]

So it happens when you operate the bathroom light switch, but not if you operate it quickly? I suspect slight arcing due to a slow operating switch, combined with a sensor which is sensitive to interference.

Can you try a different light switch and see what happens.

 

[OnlQQker]

A picture might help.
I've never seen them activate with what you're describing, but I have seen them activate from a vented fan kitchen/bathroom fan when the warmer air extracts the building through the pir sensor range. .

Not knowing what pir light you have, some of these can be set to sense 10m away and sometimes even further. They have 3 small dials below the pir in which one can be the range.

An infra red camera can be handy.

 

[Yozza19]

Are you sure you haven’t connected onto the bathroom light sw instead of the loop terminal

 

[Dustydazzler]

As above are you in fact switching the PIR light on/off when you turn the bath light on/off and thus keep putting it back to factory settings

 

[Avo Mk8]

I've noticed that when I switch off my bathroom light at night that the security light sets off.

A point of clarification Stephenmunt: - I took the above to mean when you switch off the bathroom light, the security light comes ON. Or to put it another way, what does "sets off" mean please?

 

[Stephenmunt]

A point of clarification Stephenmunt: - I took the above to mean when you switch off the bathroom light, the security light comes ON. Or to put it another way, what does "sets off" mean please?

Hi, yes the security light turns on whe the bathroom light is turned off

 

[OnlQQker]

Is there a fan in the bathroom connected in to the pull cord, or is it just a light?

 

[littlespark]

2 way switch for bathroom and PIR is on L2 with bathroom on L1?

Stranger things have happened, and i mean no disrespect to your abilities.