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Thread: Breaker size on a 240V circuit with a 40A time-delay fuse?

  1. #16
    Won't a 40A time-delay fuse blow faster than a 30A breaker under some circumstances?

    Fuses also have higher interruption ratings, I thought.

    I did have a rooftop air conditioner compressor blow one of its fuses once, and the breaker didn't trip.
    Last edited by Phil Thien; 11-17-2012 at 9:36 PM.

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