Installing occupancy sensors for multiple lighting circuits.

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Baskinelectric81

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Location
California
Occupation
Contractor
Can someone help me figure out the best way to install (3) occupancy sensors in a stockroom that will control (4) different lighting circuits. I know that I could use a lighting contactor to achieve this but is there another way utilizing power packs and or low voltage sensors???? Thanks in advance for any advice.
 
Thanks for the reply! Maybe I am not being clear enough or just not following.... I have a larges stockroom with 4 rows of strip lights. Each row is on its own circuit but they want all of the lights controlled by 3 occupancy sensors. Can you explain more details of how I could use power packs here? Thanks again!
 
I don’t quite grasp the idea of multiple occupancy sensor- long day—- why not just make them parelle to a contractor as long as the sensor are on the same circuit——

Been a long day like I said before so maybe I’ll regret this post
 
Get as many power packs as needed.
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Stick a power pack on the side of j box, hook unswitched power up to the power pack, hook hot and switch leg to the power pack. The diagram on the power pack pictured isn't very clear, but one of the blue wires is the hot and the other is the switch leg. Other brands may have different colors but they all work the same. You can daisy chain from one sensor to the next, or spider out from a power pack, or a combination of both.
 
AC\DC said:
I don’t quite grasp the idea of multiple occupancy sensor- long day—- why not just make them parelle to a contractor as long as the sensor are on the same circuit——

Been a long day like I said before so maybe I’ll regret this post
Click to expand...
That's what the power packs do except they are a lot easier to set up because you don't need to run all your switch legs to a remote contactor.
 
Not sure of the layout of the warehouse design but most cases there is minimum egress lighting that must be maintained but lighting level higher during occupancy. So likely that is why 3 Occupancy controlled and 4 lighting circuits. Likely too you would find the 4th circuit will turn on one select number of all lighting throughout, then the rest are controlled for "row". Also consider that most likely will have some of the lights (that 4th circuit) set up for emergency lighting too.
Power pack probably the best option for control especially when system already run for retrofit application as it would require the least re-running of the lighting feeds. Might need multiple sensors depending on the area coverage and obstacles (stock room shelving etc.), as they do have limited range.
 
This is a little bit of sarcasm, but there was an amazing invention a few years ago called a telephone...... Seriously, over my decades I have found so few electricians who just pick up the phone and call the manufacturer, and so many times when I have gained great knowledge by doing so. Three weeks ago, literally I had a service bay with 60 occupancy sensors, 10 power packs 5 sets of 3-way low voltage switches and I knew they could be all wired together, but Wattstopper didn't have a diagram on their instructions. They do have a tech support phone number. I called and was told exactly how to wire everything. Fore example a single power pack only has enough capacity to operate 10 occupancy sensors , it is fairly complex, but they had all the information. Accuity Greengate, Leviton all have the same service.
 
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