2 pir's with 20 lights in pvc singles

[Gav321]

I'm working in an office block and am wiring the shower rooms. I have 20 lights switched by 2 pirs. I'm just wondering would it work okay if I looped the switch wire out of the first Pir through all my lights and end it at the second Pir. Or do I need a direct link from Pir to Pir.
Thanks

 

[Darkwood]

Hi welcome to the forum

I'm not too sure what your asking here, you need to explain how the PIR's control the lights - does each PIR control its own group of fitting or do both PIRs control the same set of fittings?

With 20 lights as well, have you checked the rating of the PIR to switch so many fittings?

 

[Gav321]

Sorry for the confusion. Both pirs control the same set of lights
thanks

 

[Deleted member 9648]

Based on info given looping a switched wire through the lights and to both PIR's will work assuming all 20 lights are on the same circuit....are they?

 

[Gav321]

Yes just the one circuit. I left the first Pir with my switch wire and went through all my lights and my end of line for the switch wire is the second pir

 

[Deleted member 9648]

What sort of lights are they?

 

[Gav321]

I'm not too sure to be honest. It's still in the first fix stage

 

[Deleted member 9648]

I'm not too sure to be honest. It's still in the first fix stage

How can you design and wire a lighting circuit when you don't know what the final loading is going to be? Setting yourself up for a balls up there mate.

 

[Gav321]

How can you design and wire a lighting circuit when you don't know what the final loading is going to be? Setting yourself up for a balls up there mate.

I didn't design it. I'm sure it's all within the regs

 

[PEG]

I'm working in an office block and am wiring the shower rooms. I have 20 lights switched by 2 pirs. I'm just wondering would it work okay if I looped the switch wire out of the first Pir through all my lights and end it at the second Pir. Or do I need a direct link from Pir to Pir.
Thanks

Hi dude,the above would suggest that what you have installed,was not to any drawing,so,yes,you have imparted a modicum of design.

The method you have chose,would be ample/disastrous,depending on the type/load of the lighting fitted.

I think that's what is implied in post 8 :heart:

 

[Andy78]

I didn't design it. I'm sure it's all within the regs

If you didn't design it and you have no idea of the final connected load how can you be sure ?
If you didn't design it then why are you not asking the designer or consulting the design as to how the switching arrangement for the two sensors is to be wired ?

 

[R G]

You would have to know what fittings will be used to be able to design the circuit , especially since your talking about shower rooms here ...

 

[Gav321]

But is the wiring correct regardless of what lights are going in?

 

[Gav321]

What way would you have wired it. Say there's only 5 lights going in

 

[davesparks]

But is the wiring correct regardless of what lights are going in?

Only if the total load is less than or equal to the maximum that the PIR can control for that type of load, and then only if the conductors and ocpd are big enough, efli and vd low enough etc etc

 

[davesparks]

What way would you have wired it. Say there's only 5 lights going in

Impossible to say without seeing it. The best answer without more information is that I'd do it in the way which makes most efficient use of the cable (ie the shortest route)

 

[Gav321]

The lights are 26 watt led. There's actually only 12 lights too

 

[davesparks]

This is starting to smell a bit fishy, yesterday you told us you had already wired the 20 lights but now say there are only 12.

 

[Marvo]

It's also turning into a step-by-step installation guide request which we don't allow so I'm closing this thread I'm afraid. Discussing the pros and cons of general wiring layouts is fine and the layout you've proposed has already been deemed as plausible under certain conditions but blow by blow instructions for ongoing jobs isn't appropriate.