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Thread: Occupancy Sensors in Electrical Equipment Rooms

  1. #11
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    Quote Originally Posted by gadfly56 View Post
    I've had that tour, thanks. Let's just say I was particularly glad I have MiniMag on me at all times.
    I prefer an Olight S1 Baton. Smaller and brighter.

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    Thank you everyone for the replies.

    "The illumination for indoor service equipment, switchboards, panelboards, and motor control centers must not be controlled only by automatic means [110.26(D)]."

    Looks like I can still go ahead with the project if I install a manual "on" switch.

    Does anyone know where I can find good reference material on automatic lighting?

  3. #13
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    Quote Originally Posted by Saturn_Europa View Post
    Thank you everyone for the replies.

    "The illumination for indoor service equipment, switchboards, panelboards, and motor control centers must not be controlled only by automatic means [110.26(D)]."

    Looks like I can still go ahead with the project if I install a manual "on" switch.

    Does anyone know where I can find good reference material on automatic lighting?
    the word *only* is the thing here. you have to have local control.

    suggestion only:

    wattstopper dm-100 occ sensor. set it for two hour timeout.
    it has an on/off override for local control.
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    Quote Originally Posted by GoldDigger View Post
    Bathroom stalls pretty much guarantee that you will often be out of the active range of the sensor!
    A single occupancy bathroom is a much easier problem.
    Quote Originally Posted by gadfly56 View Post
    I've had that tour, thanks. Let's just say I was particularly glad I have MiniMag on me at all times.
    M118 trip flare doesn't need batteries

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    don't forget the daylight harvesting

    As an EC and a PE, I would never allow occupancy sensors in an electrical room, especially when I'm working in it...
    The NEC does not require it and neither do the energy codes. Strangely enough if the electrical room has windows, ASHRAE requires
    that you install daylight responsive controls...

  6. #16
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    Automatic lighting control is prohibited per 110.26(D).
    Tim
    Master Electrician
    New England
    Yesterday's Technology at Tomorrow's Prices

  7. #17
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    Quote Originally Posted by tkb View Post
    Automatic lighting control is prohibited per 110.26(D).
    not exactly.. see post #12 the word "only" changes things..
    At my age, I'm accustomed to restaurants asking me to pay in advance, but now my bank has started sending me their calendar one month at a time.

  8. #18
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    Quote Originally Posted by SparkyHC View Post
    As an EC and a PE, I would never allow occupancy sensors in an electrical room, especially when I'm working in it...
    The NEC does not require it and neither do the energy codes. Strangely enough if the electrical room has windows, ASHRAE requires
    that you install daylight responsive controls...
    california's title 24:2016 i don't believe has an exception for electric rooms.
    as for the daylight harvesting, the daylighting area has to have over 120
    watts of downlighting in either the primary or the secondary daylighting
    area to mandate harvesting on the left coast. i don't remember if ashrae
    requires it no matter what the load is.

    in my experience, if you put in an approved occupancy sensor in
    the electric room, and set the timeout factor to two hours, you
    aren't going to create a hazard. if using a dual technology occ
    sensor (wattstopper dw-100 or equal) will detect your presence,
    and if you aren't moving enough in two hours to trigger it and
    reset the time, you are asleep, and the light should be turned off
    to allow you to get your rest.
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    Quote Originally Posted by Saturn_Europa View Post
    Thank you everyone for the replies.

    "The illumination for indoor service equipment, switchboards, panelboards, and motor control centers must not be controlled only by automatic means [110.26(D)]."

    Looks like I can still go ahead with the project if I install a manual "on" switch.

    Does anyone know where I can find good reference material on automatic lighting?
    Why would you waste money on the sensors and a manual switch? If they are not shutting the manual switch off now, why would you expect them to shut off the switch that over rides the occupancy sensors?
    Don, Illinois
    (All code citations are 2017 unless otherwise noted)

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    Quote Originally Posted by don_resqcapt19 View Post
    Why would you waste money on the sensors and a manual switch? If they are not shutting the manual switch off now, why would you expect them to shut off the switch that over rides the occupancy sensors?
    Because my interpretation of the code is that there must be a "hold on" function of lightning in a room that houses Electrical equipment. We only have 8 operators , so getting everyone on board to leave the switch in "auto" shouldn't be to hard.

    Turning off and on the lights = impossible

    Leaving the switch alone = more likely

    There's only one electrician, so in theory the only time the switch will be in "over ride" on is when I'm doing electrical work. Nobody else should have to touch it.

    I'm going to try the occupancy sensors in one building to see how it goes for a couple of months before I roll it out plant wide. I'm calculating return on investment to be well under a year. Just emailed Legrand to get some install and diagram instructions. Looks fairly simple.

    Just saw another technology that uses Cat-5 Ethernet cables and RJ-45 plugs in place of the low voltage wiring. That looks pretty slick!
    Last edited by Saturn_Europa; 05-27-17 at 01:21 PM.

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