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Where more than one ampacity applies for a given circuit length, the lowest value shall be used.
Exception: Where different ampacities apply to portions of a circuit, the higher ampacity shall be permitted to be used if the total portion(s) of the circuit with lower ampacity does not exceed the lesser of 3.0 m (10 ft) or 10 percent of the total circuit.
Informational Note: See 110.14(C) for conductor temperature limitations due to termination provisions.
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