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I need an outside light which comes on with a pir and when the customer wants the light on he can switch it on thus over riding the pir so it stays on. Can you buy it like this or does it have to be wired skipping the pir? Im thinking of a luminaire with the pir built in.
Cheers
 
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I thought most pir lights had an over ride function. I bought a coach light from electrifix yesterday with manual over ride and pir. About 30 quid and looks the part with decent wiring instructions
 
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most of them come with a built-in override. you flick the switch supplying the fitting on/off twice rapidly for manual and the on/off with a 30sec. pause to revert to auto. failing this, just add an override switch ( generally means feeding the fitting in 3 core/E)
 
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I have been asked to do this for a friend and have come up with a few options. He doesn't want to just use the manual overide function, he wants a seperate switch to switch on/off whenever he wants.

1. Some lights (with PIR) have 4 terminals L, L', N, E. You could do this with 3 core cable between the isolation switch for the PIR and seperate on/off switch and then also 3 core between light and one of the switches or T&E between switches and a seperate T&E going from each switch to light, PIR isolation switch live going to L and seperate on/off switch live going to L'.

2. If the light only has 3 terminals (L, N, E), then I cant see how you can have a seperate switch as the L goes through the PIR. However I would then buy a seperate PIR which did have 4 terminals (screwfix do a stand alone PIR - good reviews, cheap and has 4 terminals) and wire as before.

I would draw some diagrams but at work and cant find a scanner! I'll draw some later if you want?

Would need extra fused spur if taking from sockets... 3 switches in total!!
 
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Very Very easy to add an overide switch, you don't even need a 3 core a twin will do, you just add a switch to the light circuit, a permanent feed from the live side of the PIR and then a switched link back to the switched side, there may be only a live neutral and earth block to connect to, but there will be a 4th terminal there which is the switch link from the pir to the light.
 
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been fitting some of those recently:
Halogen Floodlights with security pir Passive Infra Red Sensors (PIRs)
was very happy with quality and they cost a tenner.
got 4 terminals earth, neutral, feed in, pir out.
override is easy flick the switch off/on off/on withing 2 seconds and they stay on no matter of pir.
or feed them permanent live and run switchline into pir out terminal
 
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Amp David said:
3 switches, what for?
Click to expand...

Just finished a rough 12.5 hr shift and had a beer so be gentle!! Would only need the 3rd switch (i.e FCU) if sourced from sockets.

[ElectriciansForums.net] outside light question

This could be my last ever post, but I enjoyed drawing it :54:
 
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