IEC Y1 S1 Final 2023-2024
Receptacles for use on nominal 120-volt circuits are marked ___ volts.
125
A T-rated switch may be used to its ________________ current capacity when controlling an incandescent lighting load.
rated
The essential elements of good housekeeping are ___.
all of these
Refer to Figure 117.301. Diagram ___ shows Receptacle 1 to be GFCI protected and Receptacle 2 to be NOT protected.
I
Drawing ___ in Figure 112.415 is a framed locking (not key-lock) type switch.
IV
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
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.
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
Which of these is the symbol used for a 4-way switch?
$4
Grounding is covered in Article ___ in the NEC®.
250
When installed as the neutral for a 120-volt circuit, the neutral is considered to be a current-carrying conductor.
True
Match the following switch type with the correct number of terminals. Single-Pole Switch
Two Terminals
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
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 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
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
If you had to install an underground 3-wire feeder to a remote building using three individual conductors, which of the following installations "Meets Code"?
B
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.
Which receptacle is rated at 20 amps?
B.
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.
Match the following switch type with the correct number of terminals. Four-way Switch
Four terminals
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
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).
I, II & III
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
What section of the Code emphasizes the fact that all circuiting must be done so as to avoid the damaging effects of induction heating?
NEC 300.3(B), 300.20, and 300.35
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
Lighted handle toggle switches utilize a neon lamp that is illuminated when the switch is in the ___ position.
OFF
___ is (are) shown at Point A in Figure 112.223.
Plaster ears
RFI is an abbreviation for ___.
Radio Frequency Interference
Match the following switch type with the correct number of terminals. Three-Way Switch
Three terminals
What type(s) of snap switches must be installed to control a luminaire from multiple locations ?
Three-way switches, two are required
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
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 connecting single-pole, 3-way, and 4-way switches, they must be wired so that all switching is done in the ________ circuit conductor.
Ungrounded (unidentified "hot")
The identified grounded circuit conductor must be _______________________ or ___________________ in color.
White or Gray
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
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
The switch element at Point B in Figure 112.411 is the ___ of the switch.
cover
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
If you need more than two switches to control a light, you will need at least one:
four-way switch
A receptacle with a terminal marked with a W requires the connection of a ___ conductor to this terminal.
grounded
For lighting circuits, NEC® Section 404.2(C) requires a(n) ___ conductor to be provided in each switch box or enclosure.
grounded
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.
grounding
The ungrounded conductor is often called the ___.
hot
Injuries should be reported to your supervisor ___.
immediately
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.
infinity symbol (or OL on a digital meter)
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
When connecting 4-way switches, care must be taken to connect the travelers to the ____________ of terminals.
proper pairs
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
Astronomical time clocks control the on and off times for loads based on __________________________.
their specific location on the planet
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
A single-pole, double-throw switch has ___ screw terminals for the connection of current-carrying circuit conductors.
three
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
