Electrical Code… Over 1000 V…
- Fuse
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An overcurrent protective device with a circuit-opening fusible part that is heated and severed by the passage of overcurrent through it.
Informational Note: A fuse comprises all the parts that form a unit capable of performing the prescribed functions. It may or may not be the complete device necessary to connect it into an electrical circuit.
- Controlled Ventilated Power Fuse
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A fuse with provision for controlling discharge circuit interruption such that no solid material may be exhausted into the surrounding atmosphere.
Informational Note: The fuse is designed so that discharged gases will not ignite or damage insulation in the path of the discharge or propagate a flashover to or between grounded members or conduction members in the path of the discharge where the distance between the vent and such insulation or conduction members conforms to manufacturers recommendations.
- Expulsion Fuse Unit (Expulsion Fuse)
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A vented fuse unit in which the expulsion effect of gases produced by the arc and lining of the fuseholder, either alone or aided by a spring, extinguishes the arc.
- Nonvented Power Fuse
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A fuse without intentional provision for the escape of arc gases, liquids, or solid particles to the atmosphere during circuit interruption.
- Power Fuse Unit
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A vented, nonvented, or controlled vented fuse unit in which the arc is extinguished by being drawn through solid material, granular material, or liquid, either alone or aided by a spring.
- Vented Power Fuse
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A fuse with provision for the escape of arc gases, liquids, or solid particles to the surrounding atmosphere during circuit interruption.
- Multiple Fuse
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An assembly of two or more single-pole fuses.
(National Electrical Code® 100-2)