Main breaker keeps tripping


Old 09-23-09, 08:36 AM
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Main breaker keeps tripping

The last two days my main keeps tripping. I have replaced it with a new one, it still trips. No other breakers are tripping. My A/C breaker did trip once yesterday. What could make my main keep Tripping?
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Old 09-23-09, 08:44 AM
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Are you exceeding the current limit?
Old 09-23-09, 11:01 AM
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It's quite rare for breakers to go bad. As Ben mentioned, you're most likely pulling more current than the panel/subpanel is wired to handle.

A few questions to possibly narrow down the problem:
- What is the size of the main breaker? (60/100A?)
- Approximately how old is your panel?
- Was anything recently added or changed? Additional circuits, new AC, etc?
- Is this the only panel in your house? or is this a subpanel with a main panel somewhere else?
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