Wall Switch with Occupancy Sensor

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Usually those have a disconnect built in, for maintenance override. Just installed one yesterday that has a dimmer built in too. Do you have some prints or an AHJ that is requiring this?
 
If the occupancy sensor is required by the IECC C405.2.1.1 may apply. In most spaces there is a requirement for a manual off switch.
 
I did a school building one time and plans did not have switches in the corridors, had wall switch type occupancy sensors in small rooms - those of course did have manual switch on them, and the classrooms had occupancy sensor(s) in ceiling but still had multiple wall switches near the main entry to the room. They were connected downstream from the occupancy sensor - I guess the idea was you have occupancy sensing to turn on, yet can turn off certain or even all banks of lights if desired while room is occupied.
 
What always see in the drawings is that they want the 120v switch to be switched by the sensor.

What I’ve been using almost exclusively is the greengate SP20-RD4 switch pack and GMDS momentary decora switch.

It allows manual-on auto-off operation in conjunction with an occ sensor. You can configure it for auto-on as well.

It’s also low-voltage and saves me quite a bit of pipe work or MC cable. Just a stub and LV cable above the ceiling is needed, and no 120v wiring in the walls.

I’ve seen some specs though actually require 120v in the switch box and not just a comparable device that meets their intention. But most of the time I’m able to use this setup. Really nice and easy for office work.


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kwired said:
I did a school building one time and plans did not have switches in the corridors, had wall switch type occupancy sensors in small rooms - those of course did have manual switch on them, and the classrooms had occupancy sensor(s) in ceiling but still had multiple wall switches near the main entry to the room. They were connected downstream from the occupancy sensor - I guess the idea was you have occupancy sensing to turn on, yet can turn off certain or even all banks of lights if desired while room is occupied.
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Didn’t think about the ceiling mounted ones, yes it probably is for a disconnecting means so the lights could be worked on.
 
kwired said:
I did a school building one time and plans did not have switches in the corridors, had wall switch type occupancy sensors in small rooms - those of course did have manual switch on them, and the classrooms had occupancy sensor(s) in ceiling but still had multiple wall switches near the main entry to the room. They were connected downstream from the occupancy sensor - I guess the idea was you have occupancy sensing to turn on, yet can turn off certain or even all banks of lights if desired while room is occupied.
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Probably to dim the room when using a video projector or similar.
 
Thanks for the responses. You guys are very helpful and I respect your content.
This is a pretty good sized building . Their are no city or county inspections at all, no energy codes . Except the health dept does inspections if their is water in the building.
But of course their will be somebody to make sure we've done what they want.

This one will have a kitchen / coffee shop.
It's a Cowork building. Some new phenomenon through out the country.
All those people that have been working from home are getting tired of working from home. If they go to a coffee shop they are scrutinized for using a table to long after having only ordered coffee.
Or if they need to meet with their own clients they don't have to go to a resturant or hotel.
Here they pay to use the table and internet. It also has conference rooms. It even has phone booths simply for sound proofing.
It is kind of like a Barns and Noble without the books.
Plus it has confernece rooms. (with an outlet(s) under the tables) and pull down screens for videos.
 
Buck Parrish said:
Thanks for the responses. You guys are very helpful and I respect your content.
This is a pretty good sized building . Their are no city or county inspections at all, no energy codes . Except the health dept does inspections if their is water in the building.
But of course their will be somebody to make sure we've done what they want.

This one will have a kitchen / coffee shop.
It's a Cowork building. Some new phenomenon through out the country.
All those people that have been working from home are getting tired of working from home. If they go to a coffee shop they are scrutinized for using a table to long after having only ordered coffee.
Or if they need to meet with their own clients they don't have to go to a resturant or hotel.
Here they pay to use the table and internet. It also has conference rooms. It even has phone booths simply for sound proofing.
It is kind of like a Barns and Noble without the books.
Plus it has confernece rooms. (with an outlet(s) under the tables) and pull down screens for videos.
Click to expand...
Actually those have been around quite a while before Covid. The top floor of my previous employers building was set up that way. They were there already when he bought the building. When their lease finally ran out, he finally took over the whole building, and kicked them out. They weren’t happy, they had just remodeled it two years before.
 
brantmacga said:
What always see in the drawings is that they want the 120v switch to be switched by the sensor.

What I’ve been using almost exclusively is the greengate SP20-RD4 switch pack and GMDS momentary decora switch.

It allows manual-on auto-off operation in conjunction with an occ sensor. You can configure it for auto-on as well.

It’s also low-voltage and saves me quite a bit of pipe work or MC cable. Just a stub and LV cable above the ceiling is needed, and no 120v wiring in the walls.

I’ve seen some specs though actually require 120v in the switch box and not just a comparable device that meets their intention. But most of the time I’m able to use this setup. Really nice and easy for office work.


Sent from my iPhone using Tapatalk
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I like that, but the rest of the building is getting standard type switches.
 
d0nut said:
Are you sure there are no energy codes? What state is this building in?
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This is Indiana, alot of the state is rural. They do not follow codes in those areas. As most of the rural counties do not have inspectors. Except the health dept.
The engineer did draw occupancy sensors in.
 
In California ... You not only have to deal with the generic inspector(s), but now you have to deal with a lighting inspector. He's like a HERS inspector for residential. It's now required for all commercial installations. All the lighting whistles and bells must pass inspection. And they also have a HVAC inspector for the mechanical side. Get ready for it, it's coming your way.
 
mtnelect said:
In California ... You not only have to deal with the generic inspector(s), but now you have to deal with a lighting inspector. He's like a HERS inspector for residential. It's now required for all commercial installations. All the lighting whistles and bells must pass inspection. And they also have a HVAC inspector for the mechanical side. Get ready for it, it's coming your way.
Click to expand...
But LED's pull so little energy. The additional inspector might waste more energy carrying out it's task.
 
Buck Parrish said:
This is Indiana, alot of the state is rural. They do not follow codes in those areas. As most of the rural counties do not have inspectors. Except the health dept.
The engineer did draw occupancy sensors in.
Click to expand...
From what I could find in a quick internet search, it looks like Indiana has been under the 2007 version of ASHRAE 90.1 with some minor amendments since 2010.
 
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