Join Date: Aug 2006
Location: Arlington, VA
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That helps, but still not sure which switch you have on the panel. Is it a switch like most Rule panels have, or is it a breaker like the Sea Dog and some other panels have?
If the latter, it's possible that the breaker is going bad; as they age, many will trip with less than their rated current flow.
Also conceivable that the pump is somehow constrained and is drawing more current than it should, causing the breaker to go. As for difference in timing, this would be consistent....as it heats up it would trip faster.
Be sure to check all your connections to these pumps. A bad connection can show a high resistance, causing abnormal power draw.
But, if it's a plain old toggle switch, then either the switch is bad or the pump is drawing more than it should. You could put an ammeter on it to see how much it's drawing (clamp-on DC ammeter would be easiest), and compare it to the pump's rating.
Question: have you tried disconnecting one of the pumps and trying just one pump at a time?
Last edited by btrayfors; 04-17-2010 at 04:25 PM.