PIR's

[jjcale]

Hi all

I am new to this trade and just wanted to know a few things. With regards to PIR's.. as i understand it its wired like a 2 way switch? As in you have your feed from the board to your first PIR, then from there a 3 core between all PIR's and from that same point you loop to all the lighting points..is that correct?

Also with non-maintained em lighting..do you just run a circuit out of each lighting point to the em position as in keep it on the same circuit?

Not very specific i know but i hope it makes sence

Much appreciated

 

[telectrix]

not quite right.do you mean PIRs as in security lights, or occupancy sensors. either way, you traet the PIR as a switch that is powered up. L/N in and SW L/N out to light. using multiple PIRs and/or multiple lights, just parallel them up, bearing in mind the load capacity of the PIRs. with em. lighting, you should feed through a keyswitch so that you can isolate the supply to the em. without turning the mormal lights off.

 

[jjcale]

sorry, sensors i mean. Thanks i get it now. With the em you can use the keyswitch to test the em lighting as well? the job i was recently on there was no keyswitch..the em lighting just ran off the lighting points..

 

[telectrix]

sometimes that's OK. as long as switching the main lighting off for testing the em's does not cause danger or inconvenience.