Deck 19: Service Panel Trim-Out

Question 1

Type S fuses are classified at __________ amperes.

A) 0 to 15
B) 16 to 20
C) 21 to 30
D) All of the above

Answer 1

D

Question 2

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

Answer 2

A

Question 3

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

A) 240
B) 125
C) 277
D) 208

Answer 3

B

Question 4

NEC Article __________ provides many installation requirements for overcurrent protection devices.

A) 210
B) 230
C) 250
D) None of the above

Question 5

A 12 AWG branch circuit can be protected by a 15-ampere fuse or circuit breaker.

Question 6

In residential wiring, all 120-volt, 15- and 20-ampere branch circuits supplying outlets or devices in kitchens, family rooms, dining rooms, living rooms, parlors, libraries, dens, bedrooms, sunrooms, recreation rooms, closets, hallways, laundry areas, or similar rooms must be AFCI protected.

Question 7

NEC Table __________ lists the ampacity of conductors used in residential wiring.

A) 240.6
B) 220.12
C) 250.66
D) 310.15(B)(16)

Question 8

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

A) cartridge
B) Edison-base
C) Type S
D) stab

Question 9

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

A) 1/8 inch
B) 1/4 inch
C) 1/2 inch
D) 3/4 inch

Question 10

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

Question 11

A fuse type that uses the same standard screw base as an ordinary light bulb and where the different fuse sizes are interchangeable with each other is called a(n) __________ fuse.

A) cartridge
B) Edison-base
C) Type S
D) stab

Question 12

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

Question 13

A device intended to provide protection from the effects of arc faults is called a(n) __________ circuit breaker.

A) ground fault circuit interrupter
B) arc fault circuit interrupter
C) special protection
D) fuse

Question 14

The interrupting rating of fuses can be as high as __________ amperes.

A) 5,000
B) 10,000
C) 20,000
D) 300,000

Question 15

On a 240-volt residential branch circuit or feeder circuit with 10 AWG conductors, a maximum of a __________-ampere overcurrent protection device must be used.

A) 20
B) 25
C) 30
D) Any of the above

Question 16

A circuit breaker used to switch fluorescent lighting must be listed and have __________ marked on it.

A) OK for fluorescent lighting
B) FL
C) SWD only
D) SWD or HID

Question 17

In residential wiring, a 12 AWG copper conductor is protected by a __________-ampere or lower OCPD.

A) 15
B) 20
C) 25
D) 30

Question 18

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

A) day
B) week
C) month
D) year

Question 19

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

Question 20

Which of the following will not cause an overcurrent condition?

A) Open circuit
B) Ground fault
C) Overload
D) Short circuit

Question 21

If an electrician chooses to use plug fuses in a new electrical installation, they must be ____________________-plug fuses.

Question 22

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

Question 23

A 240-volt electric water heater branch circuit or feeder circuit will require a __________ circuit breaker.

A) single-pole
B) double-pole
C) HACR
D) three-pole

Question 24

Type S adapters are designed so that once inserted in a fuseholder, they cannot be ____________________.

Question 25

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

Question 26

Because all of the ampacities listed in Table 310.15(B)(16) do not correspond with a standard fuse or circuit breaker size, the NEC allows the next __________ standard overcurrent device to be used up to 800 amperes.

Question 27

Describe how you can tell the difference between a "regular" circuit breaker and a GFCI or AFCI circuit breaker.

Question 28

When working on an energized main breaker electrical panel, turning the main breaker "OFF" disconnects power from the ____________________ side of the panel.

Question 29

Because electric motors draw more current to get started than they do when running, ____________________ fuses are used to protect motor circuits.

Question 30

Cartridge fuses are available in both a __________ type and a __________ type.

A) long; short
B) round; oblong
C) ferrule; blade
D) open; closed

Question 31

Circuit breakers are always interchangeable with different manufacturer's panelboards.

Question 32

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

Question 33

A 120-volt branch circuit or feeder circuit supplying a dishwasher will require a __________ circuit breaker.

A) single-pole
B) double-pole
C) HACR
D) three-pole

Question 34

Explain what a hexagonal configuration on a plug fuse indicates.

Question 35

The color coding for a 30-ampere Type S plug fuse is __________.

A) blue
B) orange
C) green
D) any of the above

Question 36

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

Question 37

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

Question 38

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

Question 39

Overcurrent protection devices must be readily accessible.

Question 40

The color coding for a 15-ampere Type S plug fuse adapter is __________.

A) blue
B) orange
C) green
D) any of the above

Question 41

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

Question 42

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.