Page 1 of 2 12 LastLast
Results 1 to 10 of 16

Thread: Elevator Pit Lighting

  1. #1
    Join Date
    May 2008
    Location
    West Chester, PA
    Posts
    348

    Elevator Pit Lighting

    I recently learned that the ASME A17.1 elevator code requires 10 footcandles MINIMUM illumination in an elevator pit. I learned this the hard way - by having an elevator inspector with a light meter reject one of my designs (18W CFL jelly jar with guard.) The light level was "as low as 2.8 FC."

    I'm posting because I've used this design for a long time (maybe 20 years) and never had a problem before. What are others using? How can you be sure you've designed this correctly without knowing how deep the pit is and what other junk is in there?

    I also want ask if anyone has ever just run a circuit to the elevator pit and let the elevator people provide the light?

    I would like to see a better division of labor between elevator installers and electricians. I think it's unreasonable to expect us (electricians and engineers) to stay up-to-date on the arcane elevator code. So little of it applies to us. I would like to exclude any work to which the elevator code might apply. This would make a clear cut division of labor.

    How does this work in other parts of the country?

  2. #2
    Join Date
    Aug 2007
    Posts
    2,754
    in my area (MD) the inspector takes the light meter into the pit and checks the light. if he likes you, he puts it in a general area that is lit well. if he doesn't like you, he puts it in the best shadow he can find behind a pipe, and makes you keep adding jelly jars until there is enough light. It helps to paint the floor white. If a standard hdcp single elev. pit has 4 100w lights it might pass, most plans I see have one or two and they don't pass a real inspection.

  3. #3
    Join Date
    Apr 2010
    Posts
    833
    How much head room and side wall clearance do you have in the pit,if the car goes all the way down and is the side clearance all the way around?


    dick

  4. #4
    Join Date
    Sep 2004
    Location
    Durham, NC
    Posts
    5,273
    Quote Originally Posted by dicklaxt View Post
    How much head room and side wall clearance do you have in the pit,if the car goes all the way down and is the side clearance all the way around?
    Depending on the pit average about 3', use Google, images - "elevator pit". Side clearance are usually with-in inches, had one so close it turned on and off the pit lights as it road up and down.
    The wall and pit is usually just inches front to back off the wall and the sides just large enough for the rail they ride on...
    Of course all this just depends on the elevator and its requirements, but in most all cases there is a pit and there are springs to soften the landing... :grin:
    If your even thirsty, your two quarts low.

  5. #5
    I've seen two lamp damp location four foot T8 mounted on the back wall horizontally and it was controlled manually by a regular switch near the door. (and elevator code is picky about where the light switch and the red stop switch is located (so let the elevator people pencil in where the switches have to be)

    Something like this. http://www.commerciallightingcompany.com/images/VT.jpg

    I suppose you can use low-profile T5 if that won't cut it clearance wise.

    A long fluorescent should provide much more uniform lighting than a spot source and two 32W T8 lamps on a normal output ballast should provide about 6 to 7 times the output of your 16W CFL. Most ballasts support one lamp operation, so test with one bulb, but if that fails, install the second bulb.

  6. #6
    Join Date
    May 2005
    Location
    Richmond, Virginia
    Posts
    21,838
    Quote Originally Posted by cadpoint View Post
    ... had one so close it turned on and off the pit lights as it road up and down.
    As in it filled in the spaceand blocked the light, or as in the cab actually hit the switch?
    Code references based on 2005 NEC
    Larry B. Fine
    Master Electrician
    Electrical Contractor
    Richmond, VA

  7. #7
    Join Date
    Sep 2004
    Location
    Durham, NC
    Posts
    5,273
    Quote Originally Posted by LarryFine View Post
    As in it filled in the spaceand blocked the light, or as in the cab actually hit the switch?
    A piece of steel angle was turning on and off the light...
    If your even thirsty, your two quarts low.

  8. #8
    Join Date
    May 2008
    Location
    West Chester, PA
    Posts
    348
    Your experience with the light switch confirms what I've been thinking. We have just taken for granted that the electrical contract has to include that light and switch (plus a GFI receptacle, sump pump and, if its a hydro, an oil minder). It's time to stop thinking like that. I say everything in the elvator shaft should belong to the elevator guy.

    When an architect lays out an elevator shaft, he doesn't know who is going to build th elevator. He doesn't design all the steel and hydraulics or ropes and travelling cables. He doesn't know about brakes and springs. It's a mis-coordination waitng to happen every time. Why are we messing around in there at all?

  9. #9
    Join Date
    Aug 2007
    Posts
    2,754
    because every elevator company excludes it ?

  10. #10
    Join Date
    May 2008
    Location
    Palmer, MA
    Posts
    477
    and it has nothing to do with the control or operation of the elevator. Next we will be giving them the recall smokes and letting them run the power to the disconnect as well.

    Every elevator pit plan I have seen stated "to be coordinated with elevator contractor".

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •