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I don't come across these too often... A breaker caught fire in a Square D QO panel... I think either the breaker came loose from the contact & sat there & arc'd or some sort of internal malfunction caused excessive heat & the contact expanded & arc'd after coming loose from this .... BTW.. This is from the Nevada desert.. 117°F when I changed this out & this breaker fed the A/C condensor.. RLA 30.1A 240V #6AWG AL conductors for the condensor, 50A 2P breaker... Condensor listed max OCPD as 60A... Also noted was some outdoor outlets that seemed to be lacking a couple things...

-Randy
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