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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 temperature rating column i.e. 90 deg for THHN dry location but in no case can you exceed 30A.

It depends upon What type of wire and how that wire is being run. Standard ratings for residential wiring is a maximum of 30 amps for a #10 wire. To get technical, I think the maximum amperage of #10 wire run enclosed (like in metal conduit) is 33 amps. Most building inspectors will go by the 30 amp rule.

10 copper wire will hold 30 amps /we use this size wire for electrical dryers.

For aluminum wiring the maximum loading is lower. 10 gauge aluminum hold 25 AMPS.

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