Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 2 of 2

Thread: wiring low voltage lights

  1. Back To Top    #1

    Join Date
    Oct 2007
    Central Texas

    wiring low voltage lights

    Can anyone provide a sanity check for 12v lighting. I will use the hayward colorLogic lights, 3 pool size and 1 spa size. The large lights need 50 watts each and the spa light needs 25 watts. The distances to the Intermatic PX300 transformer are 70, 50, 30 and 30 feet. I was going to home run all the lines and the ground wires to a junction box under the transformer then to the transformer. I was wondering if its actually better for the junction box to be closer to the lights or the transformer? Closer to the lights will be difficult in my situation.

    Hayward recommends not exceeding 50 feet but offer lights with 100 foot cords!!!!! Since I am not a pro this mixed messge stuff really confuses me.

    Light grey plaster, stone coping, 38K gallon Roman shaped pool with a shallow end beach, table and bar stools, deep end bench and waterfall (Intelliflo 4X160). Taylor K-2006, Pentair 320 chlorinator, Intelliflow VF, Quad DE 100. 4 ColorLogics, 3 skimmers, 14 wall returns, 13 floor returns, TurboTwister slide, autofill and miles of pvc.

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD
    With low voltage lighting there can be a significant voltage drop in the wire as the wire gets longer. If there is too much voltage drop the light will not function correctly. You can compensate for this by setting the transformer to a higher voltage. I believe that the PX300 is adjustable to 12, 13, or 14 volts.

    The chart I saw in the ColorLogic manual (near the very end) said that 12v is good up to 90 feet and beyond that you can switch to 13v (to 150 feet). Remember, that is the actual wire length, which is probably going to be noticeably longer than the straight line above ground distance.

    You can put the junction box any where that is convenient. If it is far from the transformer you might want to use a heaver gauge of wire from the transformer to the junction box.
    Attached Images Attached Images
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

Posting Permissions

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