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26305 Overcurrent Protection Questions and Solutions | Grade A+ $10.39   Add to cart

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26305 Overcurrent Protection Questions and Solutions | Grade A+

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What is Amperes Interrupting Current (AIC)? ️: Maximum fault current that the breaker will safely interrupt What is considered a high-level fault? ️: 50,000 A or larger Equipment must have an interrupting rating of at least ️: Equal to current that must be interrupted. What is a ground ...

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  • June 11, 2024
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26305 Overcurrent Protection
Questions and Solutions | Grade A+


What is Amperes Interrupting Current (AIC)?


✔️: Maximum fault current that the breaker will safely interrupt




What is considered a high-level fault?


✔️: 50,000 A or larger




Equipment must have an interrupting rating of at least


✔️: Equal to current that must be interrupted.




What is a ground fault?


✔️: Unintentional grounding of conductors in an electrical system




For 480V circuits, arc current may be as low as ___ of the available bolted fault current and

seldom exceed ___


✔️: 38% , 60%

, Plug fuses are normally used in


✔️: General purpose branch circuits




Cartridge fuses may be found in


✔️: Branch circuits, feeder circuits, motor circuits, and many other special applications.




The voltage of a fuse may be at least _____ or ______ the circuit voltage. It can be _____ but

never lower.


✔️: Equal to, greater than, higher




Most modern fuses are a


✔️: Current limiting device




What is a current limiting device?


✔️: A protective device that cuts off a short circuit in less than 1/2 cycle before it reaches its

total available value




What is a dual element time delay fuse?


✔️: Fuses that are applied in circuits subject to temporary overloads and surge currents

because they provide high-performance short-circuit, and overload protection.

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