Q. What are the Code rules for sizing overcurrent protection for conductors? A. Except as permitted by (A) through (G), conductors must be protected against overcurrent in accordance with their ampacity after ampacity correction and adjustment as specified in Sec. 310.15 [240.4]. (A) Power loss hazard. Conductor overload protection isn’t required, but short-circuit protection is required where the interruption of the circuit will create a hazard; such as in a material-handling ...

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