There is a property that has a 30-amp breaker in the electrical distribution panel labeled for the AC unit. The outside HVAC unit had a maximum over-current protection rating of 25-amps. I'm looking to see how serious this is and also to understand why the breaker doesn't trip with that amp difference.

Thanks.

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Originally Posted by mbridges

There is a property that has a 30-amp breaker in the electrical distribution panel labled for the AC unit. The outside HVAC unit had a maximum over-current protection rating of 25-amps. I'm looking to see how serious this is and also to understand why the breaker doesn't trip with that amp difference.

Thanks.

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... won't trip until its limit is exceeded by some percentage. You are quoting the nameplate of the A/C unit and what it should be fused at (25A). The breaker in the panel is oversized at 30A.

Quote:

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Originally Posted by Flickit

...won't trip until its limit is exceeded by some percentage. You are quoting the nameplate of the A/C unit and what it should be fused at (25A). The breaker in the panel is oversized at 30A.

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Thank you for your response. I see what your saying about the percentage
But could you explain about the breaker in the panel being oversized and
Could that cause any problems.

Quote:

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Originally Posted by mbridges

Thank you for your response. I see what your saying about the percentage
but could you explain about the breaker in the panel being oversized and
could that cause any problems.

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... indicates a 25A rating this is to describe to the installer that no larger rating than a 25A breaker should be used as a disconnect and a resettable fuse for the A/C. As you have a 30A breaker, this is larger than the nameplate indicates and should be changed out to a 25A breaker for reasons of safety.