A branch circuit overcurrent device is a device capable of providing protection for service, feeder, and branch circuits and equipment over the full range of overcurrents between its rated current and its interrupting rating.
In essence, circuit protection is a failsafe intended to safeguard persons and property in the event of an electrical malfunction. There is a maximum voltage or amperage for each electrical circuit. If this is surpassed, the wire overheats and could possibly melt its insulation and catch fire.
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