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  1. #1
    Join Date
    Sep 2002
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    Virginia
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    lighting on contactors

    I have one restaurant that has contactor boxes for the lights , dining area has one , kitchen has one , and another area has one

    Why ?

  2. #2
    Join Date
    Mar 2013
    Location
    Port St. Lucie, Fl
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    Because the lighting load may exceed the rating of the light switches?

    Sent from my SCH-I545 using Tapatalk

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  4. #3
    Join Date
    Jan 2010
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    EMS (Energy Management System) ?

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  6. #4
    Join Date
    Sep 2002
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    Virginia
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    Thread Starter
    yea I was thinking too many amps for a switch , but why not add another switch instead of 500 dollar relay box

    I will snap pics

  7. #5
    Join Date
    Aug 2006
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    Required by code?? We have the same thing at work. Low voltage at switch, with relay box in electrical room for 277. Also there is some kind of latching circuit on the outdoor lighting. If it doesn't see a current draw, shuts the circuit down. This is giving the electricians a fit when the upgrade to LED.

    Also did you know NEC my outlaw multi-gang switch boxes? May not be anything above two gang. Reason is two many dimmers are being placed in a multi-gang switch box. Already local code in some places.
    I only have to make it work till I retire.

  8. #6
    Join Date
    Sep 2005
    Location
    Atlanta GA area
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    Built one of those back before HVAC... outdoor lighting for an industrial building... TOO many amps for the sunlight sensor. Simple box and a 30A 2 pole contactor.

    Used to blow the sunlight sensor every 6 months... never did after the relay box.
    GA-HVAC-Tech

    Your comfort, Your way, Everyday!

  9. #7
    Join Date
    Dec 2005
    Location
    Cincinnati, Oh
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    My grandpa's house was wired that way.
    Designed and built the house himself. He was an old school electrician at the power plant.
    Had a huge panel above the door frame of my grandfathers room.

    He said:
    "your dad, when he was a boy, was a moron. I was seriously afraid he would kill himself by playing with a switch."


    Not that it helps, but I remembered it and thought to share.
    "Better tell the sandman to stay away, because we're gonna be workin on this one all night."

    "Dude, you need more than 2 wires to a condenser to run a 2 stage heatpump."

    "Just get it done son."

    Dad adjusted

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  11. #8
    Join Date
    Nov 2006
    Location
    Southeastern Pa
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    Just a quick note for you guys in case you have to replace a lighting contactor....it is a different grade of contactor than we use in rooftop units, and it must be the correct type for the purpose. In other words, it must be "listed."

    Word of warning: if you give a quote, make sure you get the price first.... because lighting contactors are waaaaaay more expensive than refrigeration contactors.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist
    Member, IAEI

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  13. #9
    Join Date
    Mar 2014
    Location
    Grand Blanc
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    Quote Originally Posted by hvacvegas View Post
    My grandpa's house was wired that way.
    Designed and built the house himself. He was an old school electrician at the power plant.
    Had a huge panel above the door frame of my grandfathers room.

    He said:
    "your dad, when he was a boy, was a moron. I was seriously afraid he would kill himself by playing with a switch."


    Not that it helps, but I remembered it and thought to share.
    That's hilarious. Thanks for sharing


    Sent from my iPad using Tapatalk

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