Question about Intermatic T104 24h 208-277v Mechanical Time Switch
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Posted on Jan 02, 2017
That circuit breaker is letting you know that you've got a problem in the electrical wiring.... What's next is to turn the power off to BOTH legs of the breaker.
Begin by physically inspecting all the connections in the timer box, and at the breaker and all the way to the pump motor. Make sure all connections are dry, and there's no water in any of the conduits...this will cause a short circuit and trip the breaker. If there's any bare power leg wires touching a grounding point , this can cause the breaker to trip. Lastly check the motor on the pump; on the motor end, there should be a cap you can remove and use a crescent wrench to make sure the motor shaft is moving freely. It could be jammed with debris....this happens around my pool often because I'm surrounded by trees with needles. If the motor cannot turn freely, this will cause the breaker to blow... I'm pretty sure that your timer isn't the issue... Please let me know what you find out.
Posted on Nov 19, 2009
All that I can think of off hand is that you either have two off trippers or the on tripper is not the right one...they should say on and off right on the tripper...
You can see that is this picture...
If you have the right trippers then I would check to see why the on tripper is not contacting the lever to push it to the on position... is the motor too weak and stalling out when if hits the lever?
I have installed many of these timers and they usually work flawlessly...
I hope that this gives you enough info to figure out what is going on with your timer.
Posted on Aug 16, 2010
If i understand correctly, you have T104 240V timer that has worked fine in the past.
If this is true, then breaker is correct size.
If this is new installation, then check wiring at timer, and then add up total watts of Load and divide by 240 to check if breaker is sized correctly
If timer worked fine in the past: It seems you have a short somewhere, which is puzzling why it trips when when timer turns OFF.
And the short could be inside a bad breaker -or- inside the timer -or- possibly a wire.
Move wires from 240Breaker to another same-size 240V breaker and see if problem persists.
After moving wires to another breaker, use manual override to check if suspect is the breaker or possibly a short in the timer.
Absolutely stand on dry surface or dry boards when working on this timer, to be on safe side.
Manual override should switch Load on-off, and override should snap clean and crisp each time.
If manual override lever is not crisp, then that signals timer has gone bad.
Also snap mechanism out of box using thumb-spring at top of box, and look for signs of burning and high heat, especially at contacts.
If you buy new timer, the inside mechanism can be swapped out without changing the box.
Add a comment and let me know what you find out, and I will respond if needed.
This is interesting puzzle.
Posted on Feb 03, 2011
SOURCE: installed new t104m timer .
It sounds like there is a problem with the wiring and a neutral is running to earth when the pump switches on. Below is a diagram of the wiring. The wiring would be the same for 110 v.
Posted on May 13, 2011
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