Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 3 of 3

Thread: New 12v pool light not working.

  1. Back To Top    #1

    Join Date
    Sep 2015
    Location
    Millbury
    Posts
    2

    New 12v pool light not working.

    Ok, so I just wired up my new 12v pool light and it's not lighting. The light is wired to a pentair pool light transformer. I am getting a good 122v in. When I put my meter on the low voltage output I get the following 2 readings. 13.5v from common to 12v hot wire. 7v from ground to 12v hot wire. I get that same readings regardless if the light is connected or not. My ground connections seems fine but I would expect similar readings from common to 12v hot as I would from ground to 12v hot? I have not tested the output at the light because the different readings I am getting at the transformer have me suspecting a transformer issue.

    Any thoughts?

  2. Back To Top    #2

    TFP Guide

    Join Date
    Jun 2012
    Location
    western NY
    Posts
    1,557

    Re: New 12v pool light not working.

    Transformers usually will have two output wires. You should get your output reading between those two wires. Unless it is specified, the output should be AC "Usually" the output wires are not identified as hot/neutral. Since there is no ground conductor tied to the output side of the transformer, I am surprised that you are getting a reading at all to ground from the transformer.

    When you wrote this... I get the following 2 readings. 13.5v from common to 12v hot wire.are you measuring between the two output wires? or are you going from one output to the supply common/neutral?
    Unknown make 18' above ground (bought used in 1999) Sparco sand filter. Hayward 100,000 BTu heater. 2 speed pump

  3. Back To Top    #3

    Join Date
    Sep 2015
    Location
    Millbury
    Posts
    2

    Re: New 12v pool light not working.

    Quote Originally Posted by danpik View Post
    Transformers usually will have two output wires. You should get your output reading between those two wires. Unless it is specified, the output should be AC "Usually" the output wires are not identified as hot/neutral. Since there is no ground conductor tied to the output side of the transformer, I am surprised that you are getting a reading at all to ground from the transformer.

    When you wrote this... I get the following 2 readings. 13.5v from common to 12v hot wire.are you measuring between the two output wires? or are you going from one output to the supply common/neutral?
    I think I am good to go. I guess I should have opened the light up to begin as the bulb was not screwed in all the way. For good measure I took a reading from the light fixture and got 13.2V. Thanks for the reply and BTW I was measuring from the output of the transformer hot/neutral when I got the 13.5 at the transformer.

    Thanks again.

Posting Permissions

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