0

I'm running an irrigation pump on 240V circuit I added to my breaker panel, and it's working fine with just a switch between them. After my first attempt to add the timer between the switch and the panel failed (kept tripping the breaker when I turned the timer to "on"), I'm hoping to get some direction here. I have the wiring diagram attached. It appears to indicate the 2 wires from the breaker go to screws 2 and 4, while there's a jumper between 3 and what I'll call 0, the un-numbered screw. Then 0 and 1 run down the line to the 2-pole shut-off switch by the pond. Am I understanding correctly?

  • 2
    Welcome to DIY.SE! Your wiring diagram did not attach. Can you edit your question to provide a link to it or a link to a picture of it? – mmathis May 9 '18 at 21:45
  • When the switch is "on", it connects 1 and 2. Separately on the other pole, it connects 3 and 4. Now the timer needs power itself, and that power must be always-hot (on at all times). That must be supplied between 0 and 1. Rather than trying to wire the whole shebang at once, try hooking up only 0 and 1, and see if the timer then runs. – Harper May 10 '18 at 1:17
1

You have it backwards

While I can't explain the breaker trips in your setup, the documentation for your timer has the line in going to 0 (with the jumper to 3) and 1, with the load (the wires to the shutoff) connected to 2 and 4. The way you have it wired won't work anyway, as the motor would be powered through the timer contacts, which would cause the timer to not time 99% of the time.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.