Importance
When designing an electrical installation fuses and circuit breakers must be chosen so that they can safely break the current of a short circuit. When a large electric current is interrupted an arc forms, and if the breaking capacity of a fuse or circuit breaker is exceeded, it will not extinguish the arc. Current will continue, resulting in damage to equipment, fire or explosion.
Read more about this topic: Prospective Short Circuit Current
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—Henry David Thoreau (1817–1862)
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