mardi 3 mars 2015

240v Pool pump with timer and toggle switch

Hi,



I'm trying to figure out why this isn't working.



I have a 1HP 240V Pentair pool pump and Intermatic P7103ME Timer. The power comes from a 2 pole 20A breaker. This all keeps my large inground spa happy and blue.



The timer has worked great. The problem I have is when people use the "Manual" button on the front of the timer itself they forget to put it back to "Auto" and leave the setting at "off" and then I come home to a green algae filed spa. So I want to wire in an idiot proof toggle switch that bypasses the timer and turns the pump on. I figured I'd just wire a 2 pole 240V toggle switch in parallel with the timer and everything would be great!



The timer turns on fine, and the toggle switch turns on fine. But if they both turn on at the same time the relay in the timer arcs and the breaker throws.



It's wired as such:

The two hots comes from the panel. They wirenut into a splice that goes into the Supply side of both the timer and the toggle switch, then the Load side of both the toggle and timer and wirenutted to the wires going to the pump.



Since it's arcing I'm doing something wrong, correct? Could I just have a chaffed wire somewhere (the electrician doing the work already blew the relay just rewiring the timer in during my electrical panel upgrade because there was a chaffed wire). Am I asking something that's weird? Wouldn't someone want to have a timer with an external manual override that doesn't affect the timer (it'd like to just put a padlock on the timer box)? So that if the timer kicks on while the manual override (toggle switch) is on that it doesn't blow up.



Any help would be awesome sauce! Thanks

240v Pool pump with timer and toggle switch

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