IEC Final Exam

Refer to Figure 113.511. The receptacle is properly connected and energized. If the leads of the voltmeter are placed between Points B and E, the meter should indicate ___ volts.

120

Receptacles for use on nominal 120-volt circuits are marked ___ volts.

125

If you need more than two switches to control a light, you will need at least one:

four-way switch

Refer to Figure 113.511. The receptacle is properly connected and energized. If the leads of the voltmeter are placed between Points A and B, the meter should indicate ___ volts.

0

The level of leakage current required to trip an IDCI- or ALCI-protected appliance is ___.

4 to 6 mA

Refer to Figure 117.301. Diagram ___ shows Receptacle 1 to be GFCI protected and Receptacle 2 to be NOT protected.

I

Refer to Figure 112.040. Which wiring diagram is correctly connected for a pilot light switch?

IV

The operation diagram for a four-way switch is shown at ___ in Figure 112.005.

IV

SPST is an abbreviation for ___.

Single Pole-Single Throw

What type of switch would you use to control a lighting load from one location only?

Single pole

For lighting circuits, NEC® Section 404.2(C) requires a(n) ___ conductor to be provided in each switch box or enclosure.

grounded

The neutral conductor of a 120-volt circuit is referred to as the ___ conductor in the NEC®.

grounded

A circuit breaker is a switch that when in the "off" position ___ the circuit.

opens

A convenience receptacle has been installed within a fenced equipment yard (inaccessible to the public) behind a hospital to meet the requirements of NEC® Section 210.63 (servicing of equipment). This receptacle is required to be GFCI protected.

True

Conductors are connected to the line & load side of a GFCI receptacle as shown below. The receptacle is energized. If a person touches Point A with one hand while touching Point B with the other hand, the GFCI receptacle ___ "trip."

will not

Refer to Figure 112.225. After removing the receptacle from its package, you are going to check it with an ohmmeter. If the leads of the ohmmeter are placed between Points D and G, the meter should indicate ___ ohms.

∞ (or OL on a digital meter)

Class A GFCIs are designed to trip when a fault of about ___ amps occurs.

.006

Refer to Figure 112.226. After removing the receptacle from its package, you are going to check it with an ohmmeter. If the leads of the ohmmeter are placed between Points G and C, the meter should indicate ___ ohms.

0 (or close to zero)

Refer to Figure 113.511. After removing the receptacle from its package, you are going to check it with an ohmmeter. If the leads of the ohmmeter are placed between Points C and D, the meter should indicate ___ ohms.

0 (or close to zero)

Refer to Figure 112.413. The switch can accept wire as large as ___ AWG.

10

Refer to Figure 108.014. Where this kitchen is in a house, which receptacles are required to be GFCI protected?

2, 4, 11, 6, 7, 8 & 9 only

A device with a L7-20P NEMA designation indicates that the device is rated for operation at ___ amps.

20

Grounding is covered in Article ___ in the NEC®.

250

An insulated grounded conductor of 6 AWG or smaller shall be identified by a continuous white or gray outer finish or by ___ continuous white stripes on other than green insulation along its entire length.

3

How many 4-way switches are required to control a light from five locations?

3

A device that senses the rapid fluctuation of current flow is called a(n) ___.

AFCI

AFCI is an abbreviation (stands for) ___.

Arc Fault Circuit Interrupter

Which of the connection diagrams shown below is wired to operate correctly so that the lamp can be controlled from any switch and the markings on the white conductors do not violate NEC® 200.7? Future wall access is available as required in NEC® 404.2(C)(2).

B , 2nd option pic

Which receptacle is rated at 20 amps?

B Second pic

For the receptacle shown in Figure 112.216, an ungrounded conductor is connected at Point ___.

C only

Refer to Figure 123.31. An ungrounded conductor should be connected to the ___ terminal on this receptacle.

D, black rectangle

Refer to Figure 113.513. ___ is a single receptacle (NO special functions).

Drawing III

Which of the following is an example of a "device?"

GFCI receptacle

GFCI is an abbreviation (stands for) ___.

Ground Fault Circuit Interrupter

A branch circuit supplies 6 receptacles. The branch circuit originates in a 120/240-volt 1Ø, 3-wire panelboard. The 14 AWG circuit conductors are connected to a 15-A circuit breaker. The receptacles are permitted to be rated ___. I. 15 amperes II. 20 amperes

I only

To operate equipment ___ in Figure MHE-1, you must be fully trained and qualified.

I or II or III

Where installed in conduit, which of the following wire colors are permitted for "hots," travelers, and switch legs of a circuit? I. black, red, and blue II. brown, orange, and yellow III. pink, black, and blue

I or II or III

The color of the insulation of a neutral conductor that is 8 AWG shall be ___. I. white II. bare III. gray

I or III only

Refer to Figure 117.301. Diagram ___ shows both Receptacles 1 & 2 to be GFCI protected.

II

What conductor in a circuit cannot be marked with a color of white or gray? I. grounded II. equipment grounding III. ungrounded

II & III only

A GFCI receptacle is energized and another receptacle is supplied from the load side connections on the GFCI. On the downstream receptacle if you touch the "hot" with one hand and the ___ with the other hand, the GFCI will trip. I. neutral terminal II. ground terminal

II only

Refer to Figure 119.102. Drawing ___ is correctly connected so that all of the following are true. • The left half of the receptacle is connected to Ckt 22 and switched with the left switch. • The right half of the receptacle is connected to Ckt 24 and constantly "hot." • The luminaire is connected to Ckt 24 and switched with the right switch.

II only

What conductor in a circuit can be marked with a green color? I. grounded II. equipment grounding III. ungrounded

II only

Which of these receptacles is permitted to be connected to a 20-amp, 120-volt branch circuit that supplies power to this receptacle only? I. 15-amp II. 20-amp

II only

Both lamps are to be controlled from the switch. Which of the connection diagrams shown in Figure 112.511 is wired to operate correctly and does not violate 200.7 in the NEC®? Type AC 12-2 and 12-3 cables are used between the outlet boxes. Future wall access is available as required in NEC® 404.2(C)(2).

IV only

The Code section that addresses sensor (automatic) control of lighting in a restaurant bathroom is ___. Select N/A (not applicable) if there is not a Code reference for this.

N/A

Does the NEC® require GFCI protection for a receptacle installed to supply 120-volt power to a gas range? The range is located 10 feet from the sink.

No

The switch element at Point B in Figure 112.411 is the ___ of the switch.

Not Body

Drawing ___ in Figure 112.415 is a framed locking (not key-lock) type switch.

Not D.VI or E.None of these

A single-pole, double-throw switch has ___ screw terminals for the connection of current-carrying circuit conductors.

Not Four

The lamp shown in Figure 122.514 is to be controlled from either switch. Which of the following statements is true for Connection Diagram B? No wall access is available for future cable installation. I. It is wired to operate correctly. II. The markings on the white conductor do not violate 200.7(C)(1) in the NEC®. III. This installation meets the requirements of NEC® 404.2(C).

Not I & II only

If a ground fault occurs in the conductors leading out to a 120-volt load, the current flows out on the "hot" and almost all of the current returns on the ___ conductor. Assume this is a properly connected circuit.

Not ungrounded

The attachment cord cap (plug) shown in Figure 112.233 is connected to a table lamp. Tab 2 is connected to the ___ conductor of the branch circuit when the cord cap is plugged into a wall receptacle.

Not ungrounded

___ is (are) shown at Point A in Figure 112.223.

Plaster ears

RFI is an abbreviation for ___.

Radio Frequency Interference

As used in the NEC®, SPD is an acronym for ___.

Surge Protective Device

CO/ALR switches must be used when aluminum building wire is to be terminated.

True

During a ground fault, the current flow to a 120-volt load also travels through the source (typically a transformer winding). Assume this is a properly connected circuit.

True

Switches that are rated for AC-DC produce a "snapping" sound when the toggle is operated.

True

The NEC® specifies that tamper-resistant receptacles be installed in kindergarten classrooms.

True

The current flow to a 120-volt load travels through the source (typically a transformer winding). Assume this is a properly connected circuit.

True

When installed as the neutral for a 120-volt circuit, the neutral is considered to be a current-carrying conductor.

True

Refer to Figure 116.108. Drawing(s) ___ correctly shows a light that is controlled from two locations (two 3-ways).

Y & Z only

Refer to Figure 116.106. Which of the connection diagrams is correctly drawn? The receptacle is to be controlled from one switch, the fan should operate from another switch, and the light should operate from the two three-way switches.

Y only

Is it permitted to control a 120-volt incandescent (tungsten filament) lighting circuit with a switch rated for 15 A and 120-277 V? The circuit has 9 fixtures and each fixture will have a 200 W, 120-V lamp installed in it.

Yes

Refer to Figure 108.010. If a receptacle is installed in countertop space D, does the NEC® require it to be GFCI protected? This kitchen layout is in a house.

Yes

Refer to Figure 108.010. If a receptacle is installed in countertop space F in a Taco Bell, does the NEC® require it to be GFCI protected?

Yes

Refer to Figure 108.010. This kitchen is located in Luther's Bar-B-Que. If a receptacle is installed in wall space H (no countertops), does the NEC® require it to be GFCI protected?

Yes

Refer to Figure 112.020. In Diagram II, are the conductors correctly connected so that the light can be controlled from either switch?

Yes

The essential elements of good housekeeping are ___.

all of these

An AFCI breaker is used because it detects ___.

an arcing condition

An AFCI circuit breaker can be used instead of a standard circuit breaker and will trip when ___ occurs on the circuit.

any of these

Lighted handle toggle switches utilize a neon lamp that is illuminated when the switch is in the ___ position.

b.OFF

Tools and equipment should be removed from the ___ of a pickup truck.

back

Light switches (toggle switches) are rated for the maximum ___. I. voltage II. current

both I & II

The Code requires which of the following residential receptacles to be GFCI protected? I. A receptacle installed on a garage ceiling for an automatic garage door operator II. A receptacle installed above a work table in a garage

both I & II

Which of these is the symbol used for a 4-way switch?

c.$4

A branch circuit that supplies 4 receptacles originates in a 120/240-volt 1Ø, 3-wire panelboard. The 12 AWG circuit conductors are connected to a 20-A circuit breaker. The receptacles are permitted to be rated ___. I. 20 amperes II. 15 amperes

either I or II

Refer to Figure 112.413. The switch is suitable for back-wiring using ___ copper wire. I. stranded II. solid

either I or II

A ___ switch is permitted to be used to control a 120-volt fluorescent lighting circuit.

either a or b

For the connection of current-carrying circuit conductors, a DPST switch has ___ screw terminals.

four

A receptacle with a terminal marked with a W requires the connection of a ___ conductor to this terminal.

grounded

The ungrounded conductor is often called the ___.

hot

Injuries should be reported to your supervisor ___.

immediately

When a single receptacle of any rating is installed on an individual branch circuit, the receptacle rating must not be ___ than the rating of the branch circuit.

less

Transient voltage surge suppressors are used to minimize the damage to connected equipment caused by ___.

line surges and spikes

If a receptacle has a NEMA designation that is L8-30R, this indicates that the receptacle can be mated with a ___-type plug attached to a flexible cord.

locking

During a ground fault, the resistance of the return path for current is ___ the resistance of the path taken during normal operation. Assume this is a properly connected circuit.

lower than

Refer to Figure 112.711. Switch 2 controls the ___.

luminaire

A luminaire has one blue wire and one white wire for field connection. When using cable (NM, AC, or MC for example), the wire connected to the blue wire from the luminaire ___.

must have colored insulation (not green or white or gray)

Refer to Figure 128.110. Which of the drawings shows the (3-lamp) 2 x 4 luminaire correctly connected? The "outboard" or 2-lamp ballast is to be controlled from switch #1 and the "inboard" or 1-lamp ballast is to be controlled from switch #2.

neither I nor II

It is permitted to refuel ___-powered equipment while it is running. I. diesel II. gasoline III. propane

neither I nor II nor III

Refer to Figure 112.512. The lamp on the right is to be ON constantly (as a night light) and the lamp on the left is to be controlled from the switch. Which of the connection diagrams is wired to operate correctly and does not violate 200.7 in the NEC®? Type AC 12-2 and 12-3 cables are used between the outlet boxes. Future wall access is available as required in NEC® 404.2(C)(2).

none of these

The NEC® requires that tamper-resistant receptacles be used in ___.

none of these

SPST switches are commonly called "___" switches.

single-pole

Refer to Figure 112.31. The light is ___.

switched

To convert a conventional duplex receptacle into a split-wired receptacle, the ___ is removed.

tab

For stairway lighting, a typical installation is to install a 3-way switching system. For a commercial building, ___ for stairway lighting control.

there are no NEC® requirements

Locking-type plugs require ___ to separate the plug from the receptacle.

turning and pulling

The "hot" conductor of a circuit is referred to as the ___ conductor in the NEC®.

ungrounded