The NEC limits the overcurrent protection of #10 copper to 30A. This means that that a continuous load supplied by the #10 cannot exceed 24A unless the breaker is rated for 100% continuous duty Don't forget to apply any derating factors as required in table 310.16 of the NEC. For derating you can use the appropriate temeprature rating column i.e.90 deg for THHN dry location but in no case can you exceed 30A.wiki.answers.com»
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