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Troubleshooting Wiring After Replacing Breaker?

Could a wire going to a breaker be bad after the tripped breaker got replaced? My main breaker tripped due to two smaller breakers on the panel shorting out.

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The one smaller breaker is a 15amp and the other one is a double-30amp. The larger operates my A/C compressor, and possibly a light in the back of my basement which is currently out. Subsequently, I cannot identify what the smaller one operates because everything else in the house is working.

The reason why I do not think that the smaller one operates the basement light that is out, is because when I tested the wire with a voltage meter, after replacing the breaker, I got a reading. Whereas I keep getting no readings from the double-30 one that I also replaced.

1. Could the trip/short have fried the wires? There is some burnt plastic residue on the little metal bracket that holdsthe breaker to the main metal stem of the panel.
2. Would that have any impact on the conduit of the breaker?
3. Is there any other method to troubleshoot this, before I call out an electrician?

Thanks in advance!

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August 20, 20150 found this helpful

Yes, the wire could be bad or something may be wrong in the panel itself.

I would get an electrician in quickly. The "burnt plastic residue" in your breaker box is not normal.

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The double pole 30 amp breaker being turned on and passing no power is not normal.

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Home and Garden Repair Home ElectricalAugust 19, 2015
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