Need Input - Transformer Extension

Discussion in 'Irrigation' started by stiches9, Oct 4, 2011.

  1. stiches9

    stiches9 LawnSite Member
    Messages: 14

    Hi all. Have yet to find info on this, so here goes...
    Previous irrigation controller (ProC) intallation includes "extended" (spliced) wires between Hunter transformer and controller. This was apparently done to enable the transformer to be plugged into the 120 outlet in garage ceiling (power for gar door opener) as there is no 120 near controller. However, they extended only the 2 24V AC wires, but not the ground wire. This has resulted in a floating ground causing signal problems. Thought that I could simply add a ground, but when I talked to Hunter, they suggested they don't support or spec such a setup. Other than adding an AC outlet, any recommended solutions?
  2. hoskm01

    hoskm01 LawnSite Fanatic
    Messages: 5,690

    Extension cord. Maybe not code, but better to extended through a grounded, proper cord than from the transformer down.
  3. jvanvliet

    jvanvliet LawnSite Gold Member
    Messages: 3,944

    why not add the ground as long as it goes back to the grounding block in the breaker panel. Futzing around with extension cords seems bush league.
  4. DanaMac

    DanaMac LawnSite Fanatic
    Messages: 13,226

    And splicing the transformer wires isn't?
    I vote extension cord, or get an outlet added to the wall near controller.
  5. Waterit

    Waterit LawnSite Silver Member
    Messages: 2,931

    What he said. Since this is the garage, there must be crawlspace, run the cord that way and then pop out of the wall near the controller.

    Or get an electrician to install a proper grounded outlet:hammerhead:
  6. AI Inc

    AI Inc LawnSite Fanatic
    Messages: 27,061

    3 wire , done
  7. Mike Leary

    Mike Leary LawnSite Fanatic
    Messages: 23,172

    One of the biggest mistakes in controller installation is to wire it to a outlet that's connected to a freezer/garage door circuit; clocks should be on a dedicated circuit.
  8. txirrigation

    txirrigation LawnSite Senior Member
    from Texas
    Messages: 977

    Bingo, as usual.

    To the origonal poster, that is very common around here. I am also located just north of austin. We splice in the low voltage wire all the time, and it is to code (because it is 24vac). Run a third wire and be done with it.

    Factoring in $210 for an electriction to add a new outlet for a 24VAC wire will take you out of the install game. Most of the time the home builders put a dedicated outlet.

    In my contract it clearly states that the home owner is responsible for providing power to the controller. If they dont, we splice in 16ga. low voltage irrigation wire to make the run to the garage outlet. Give the H/O an option of $210 plus your time, or $75 plus 10' of low voltage wire and see what they choose.

    To add to what Leary said, the reason there needs to be an addional dedicated plug is because if it is wired to the garage and fridge it will get tripped often.

    You are not an electriction but an irrigator, so if the house does not have an outlet that is the H/O problem.
  9. Mike Leary

    Mike Leary LawnSite Fanatic
    Messages: 23,172

    "Most of the time" is never in my market unless I'm in on the ground floor. I've gone in to do a clock after the house completion and found the garage sheetrocked with a GFI outlet for me (whoopee-do). :hammerhead:
  10. Kiril

    Kiril LawnSite Fanatic
    Messages: 18,335

    That is because it is ridiculous to run a dedicated circuit for an irrigation timer .... and it is equally as ridiculous to have a garage with only a single circuit ..... and even more ridiculous with only a single receptacle .... and utterly foolish stupid ridiculous to splice into the low voltage side of a wall wart.

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