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Exam 19: Service Panel Trim-Out

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Question 21

Multiple Choice

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A(n) __________ fuse is enclosed in an insulating tube that confines the arc when the fuse blows and is available in either a ferrule or blade style.

A) cartridge
B) Edison base
C) type S
D) stab

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Question 22

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All circuit breakers must be designed so that any fault must be cleared before the circuit breaker can be ____________________.

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Question 23

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Overcurrent protection devices must be readily accessible.

All plug fuses are limited to circuits where the voltage between conductors does not exceed __________ volts. (General Rule)

A single-pole circuit breaker has one stab contact and a two-pole circuit breaker has two stab contacts.

The NEC permits overcurrent protection devices to be located in bathrooms.

Fuseholders for current-limiting fuses can not permit the insertion of fuses that are not ______________________________.

A GFCI or AFCI circuit breaker should be tested at least once a ___________.

When installing an ungrounded conductor in a circuit breaker, approximately __________ of insulation is stripped from the end of the conductor.

The highest current at rated voltage that a device is intended to interrupt under standard test conditions is called the ____________________ rating.

A(n) __________ fuse uses different fuse bases for each size fuse and an adapter that matches each fuse size is required.

Name an advantage to installing a multiwire circuit in residential wiring.

Which of the following will not cause an overcurrent condition?

The circuit breakers are attached to the bus bar by contacts in the breakers commonly called ____________________.

Explain what a hexagonal configuration on a plug fuse indicates.

A two-pole circuit breaker is used to protect a 120-volt branch circuit.

Explain how a 240-volt circuit is wired differently than a 120/240-volt circuit.

Type S fuses are classified at __________ amperes.

When installing a two-pole circuit breaker to protect a two-wire Type NM cable feeding a 240 volt electric water heater, describe what needs to be done with the white conductor in the cable that will be terminated at the breaker.

For circuit breakers, if the interrupting rating is different than ____________________ amperes, it must be marked on the breaker.