Light issue

[STI]

Hi all,

Can you help please. I converted my garage into front section utility room rear section workshop. I have a sub board in there with a 32 amp breaker for plugs etc and 6 amp for lighting. I have wired the lighting from the breaker to a motion/light sensor switch for the lights in the utility (2 x g24 fluorescents). From this switch i have continued the circuit to the workshop switch. This is a standard 2 way switch connected as a single way going to a further G24 light fitting. The neutral are connected via standard block connectors.

Everything works fine except now with the darker nights i have noticed, even during daylight, when i switch my workshop light OFF, the utility room lights come on. They will switch themselves off after the normal delay.

Any advice as to what's going on and how i can fix it. Its not a major problem, just frustrated that i cant think what's causing it to happen other than a voltage peak when i switch off the workshop light.

 

[ericmark]

It had detected lack of light so has switched on. Then when no movement detected it switches off again.

 

[EFLImpudence]

when i switch my workshop light OFF, the utility room lights come on. They will switch themselves off after the normal delay.

That's normally what happens when the supply to a PIR is switched on after being dead.

Could there be a wiring fault that might cut the power to the PIR when the workshop light is on??

 

[STI]

OK, yes i see what you mean. I will check the voltage at the PIR with the work shop light on. Thanks i wouldn't have thought of it in that way.
Just thinking it through, The supply goes to the PIR first so i cant see how it loses power at any point. From memory the circuit is MCB To junction box. Two lines out of the junction box to the light switches, so a pretty simple set up

 

[STI]

@ericmark, No i dont think so. This happens in daylight when if i just go into the utility room it doesn't switch on because there is sufficient daylight.