Replacing garage light switch with a sensor and override

[leighv]

Evening all,

I'm trying to replace a normal on/off light switch with a sensor/motion detector with an override switch. In short, if the PIR doesn't work for some reason, then I can just switch the light on.

http://cpc.farnell.com/pro-elec/0901s/switch-pir-switched/dp/PL11072?CMP=TREML007-005
https://drive.google.com/open?id=0B5xaruXxRy2tc3V2Zk42S1BmbDdoY0IyUDFVTnc3WVlneDJZ

It doesn't work when I replace it. It works fine with the original switch, but as soon as I change it to the PIR - the light doesn't come on. Any ideas why? Thanks.

 

[ban-all-sheds]

How did you wire the PIR switch up? Your photo is of the original switch, not the new one.

 

[foxhole]

Requires a neutral wire, you can get them that don’t .

• This is a 3 wire switch (requires neutral)
• Ratings: Max. 10A (2400W) incandescent lamps or 3A (720W) energy saving lamps, fluorescent lights & exhaust fans

 

[winston1]

Requires a neutral wire, you can get them that don’t .

• This is a 3 wire switch (requires neutral)
• Ratings: Max. 10A (2400W) incandescent lamps or 3A (720W) energy saving lamps, fluorescent lights & exhaust fans

He has a neutral, 2 of 'em in fact in a choc block. See 2nd picture. Whether he has connected them to the switch or not is another matter.

 

[securespark]

Just cos they're blue....

Think fox is talking about the PIR (switch) not the mechanical one.

As BAS says, we need to see how it has been connected up.

 

[ban-all-sheds]

He has a neutral, 2 of 'em in fact in a choc block.

Probably.

Whether he has connected them to the switch or not is another matter.

Well, this is the diagram in the instructions:

so there'd not be any excuse not to....

 

[EFLImpudence]

It has this in the product link:

Something lost in translation, probably.

Does the switch actually override the PIR or does it just turn on the supply to the PIR?

 

[ban-all-sheds]

 

[securespark]

Bit gash...

There's no off position & folk will fiddle with it.

 

[ban-all-sheds]

Not necessarily - if there's only a limited number of folk who use the garage, and they have the smarts to learn how the switch works, there'll be no problems.

 

[leighv]

See attached

C935A797-9164-414C-8C87-BEC5655A09EF

• leighv
• 20 Feb 2018

4C55986F-22E9-4A2B-9A6D-CEFD992858EA

• leighv
• 20 Feb 2018

 

[EFLImpudence]

Do you have the browns the wrong way round?

 

[ban-all-sheds]

Are the blues neutral, or are they nothing because the original switch was installed by a numpty who thought he could only use browns in a switch drop?

 

[leighv]

I've tried both ways with the browns - no difference. For the neutrals - no idea. How would I tell? Thanks.

 

[ban-all-sheds]

By using your multimeter or other two-pole voltage tester, which is a tool you should have if you want to do electrical work as it is as essential as screwdrivers and wire cutters etc, to check that there is a voltage between them and the line conductor.

And by seeing where they are connected at the other end(s).