(206) 949-5683, Top Rated Plumber, Seattle
Results 1 to 6 of 6

Thread: tripping breaker

  1. #1
    DIY Junior Member bcdudley's Avatar
    Join Date
    Nov 2011
    Location
    Texas
    Posts
    15

    Default tripping breaker

    I have a 20 amp breaker that keeps tripping. I have replaced the breaker and that did not resolve the problem. The circuit was added after the house was built and the only thing on it is the sprinkler system timer and one of the large outdoor floodlights. I think it is a high pressure sodium light. The light has a photo cell, but it does not work. The breaker only trips when the light is left on for more than 48 hours and if the sprinkler system is turned on. I can leave one or the other on for an indefinite amount of time with no problems.

    The sprinkler system uses a dc brick and pulls a very small load. I think it is something like 24 watts and 800 milliamps. I do not know what the light pulls.

    Should I just split them up to different circuits, or do I have a different problem?

    Thanks.

  2. #2
    Electrical Contractor/Instructor jwelectric's Avatar
    Join Date
    Jun 2007
    Location
    North Carolina
    Posts
    2,523

    Default

    Without some testing it would be impossible to say if there was some other problem.

    Why would you leave that big light on in the daytime for? Do you like giving your money to the utility?

    It could possibly be the light if it is left on all the time.

  3. #3
    Retired Defense Industry Engineer jadnashua's Avatar
    Join Date
    Sep 2004
    Location
    New England
    Posts
    21,405

    Default

    The gradual heat buildup from being on for a long time may cause something to expand and short, or the high voltage supply momentarily crap out and short the line. If that's the case, splitting the feeds wouldn't likely help.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  4. #4
    Jack of all trades DonL's Avatar
    Join Date
    Mar 2011
    Location
    Houston, TX
    Posts
    3,648

    Default

    Quote Originally Posted by bcdudley View Post
    The light has a photo cell, but it does not work. The breaker only trips when the light is left on for more than 48 hours and if the sprinkler system is turned on. I can leave one or the other on for an indefinite amount of time with no problems.Thanks.
    You may want to replace the photo Cell, but the ballasts may be toasted. That type of a fixture needs Much cooling and running 24/7 in the Texas heat and ON may have toasted the Transformer Windings and a arc-over may be blowing the breaker.

    A low voltage transformer can do that also, but it normally will melt its internal fuse, and just be dead.


    You should quit using that light until the problem is solved. I would have quit using it when the photocell quit working.
    Theory only works perfect in a vacuum.

    Cyber Security Protection for Windows C:\ > WWW.WinForce.Net

  5. #5
    DIY Junior Member bcdudley's Avatar
    Join Date
    Nov 2011
    Location
    Texas
    Posts
    15

    Default

    The light was in the house before I moved in. It was hard wired to the breaker with no switch. I installed one a while back and keep it off 99% of the time now. I usually don't even turn it on at night unless I need it. The light is on a pole about 20' up in the air and the photocell is on top of the housing. I do not have an A-frame ladder that tall and have not had a chance to go rent one yet. I can see from the ground that the plastic cap that goes over the photocell is busted.

    Also, that doesn't explain why it only does it when the sprinkler system is on.

    I was going to replace the photocell this weekend, but I wanted to see if there was anything else I needed to do while I had the ladder and I was up there.

  6. #6
    Jack of all trades DonL's Avatar
    Join Date
    Mar 2011
    Location
    Houston, TX
    Posts
    3,648

    Default

    You should be able to tell the rating by the bulb that it uses.

    Maybe you are at the breaker limit.
    Theory only works perfect in a vacuum.

    Cyber Security Protection for Windows C:\ > WWW.WinForce.Net

Similar Threads

  1. circut breaker tripping need help!!
    By michael1121 in forum Pumps and Tanks Well Forum & Blog
    Replies: 6
    Last Post: 07-23-2009, 04:28 AM
  2. Circuit breaker keeps tripping
    By cluesmom in forum Electrical Forum discussion & Blog
    Replies: 16
    Last Post: 04-05-2009, 04:49 PM
  3. Oven Tripping Breaker
    By molo in forum Electrical Forum discussion & Blog
    Replies: 20
    Last Post: 10-20-2008, 08:25 AM
  4. Breaker keeps tripping
    By Ryan1978 in forum Electrical Forum discussion & Blog
    Replies: 7
    Last Post: 10-22-2007, 08:13 PM
  5. Breaker keeps tripping
    By cjo in forum Pumps and Tanks Well Forum & Blog
    Replies: 4
    Last Post: 11-29-2005, 05:37 PM

Bookmarks

Posting Permissions

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