IEC FINAL YEAR EXAM GUIDE NEWEST VERSION 2024-2025
EXPECTED QUESTION AND CORRECT ANSWER FROM VERIFIED
SOURCES RATED A GRADE.
What type of switch would you use to control a lighting load from one
location only? ✔✔ANSWER✔✔Single pole
SPST is an abbreviation for ___. ✔✔ANSWER✔✔Single Pole-Single
Throw
The neutral conductor of a 120-volt circuit is referred to as the ___
conductor in the NEC®. ✔✔ANSWER✔✔grounded
The "hot" conductor of a circuit is referred to as the ___ conductor in
the NEC®. ✔✔ANSWER✔✔ungrounded
When installed as the neutral for a 120-volt circuit, the neutral is
considered to be a current-carrying conductor. ✔✔ANSWER✔✔True
Which of the following is an example of a "device?"
✔✔ANSWER✔✔GFCI receptacle
The color of the insulation of a neutral conductor that is 8 AWG shall be
___.
,I. white II. bare III. gray ✔✔ANSWER✔✔I or III only
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. ✔✔ANSWER✔✔3
What conductor in a circuit cannot be marked with a color of white or
gray?
I. grounded II. equipment grounding III. ungrounded ✔✔ANSWER✔✔II
& III only
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 ✔✔ANSWER✔✔I or II or III
What conductor in a circuit can be marked with a green color?
I. grounded II. equipment grounding III. ungrounded ✔✔ANSWER✔✔II
only
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 ___. ✔✔ANSWER✔✔must have
colored insulation (not green or white or gray)
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. ✔✔ANSWER✔✔N/A
For stairway lighting, a typical installation is to install a 3-way switching
system. For a commercial building, ___ for stairway lighting control.
✔✔ANSWER✔✔there are no NEC® requirements
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). ✔✔ANSWER✔✔IV only
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). ✔✔ANSWER✔✔none of these
, 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).
✔✔ANSWER✔✔Not I & II only
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).
✔✔ANSWER✔✔B , 2nd option pic
Which of these is the symbol used for a 4-way switch?
✔✔ANSWER✔✔c.$4
Lighted handle toggle switches utilize a neon lamp that is illuminated
when the switch is in the ___ position. ✔✔ANSWER✔✔b.OFF
The ungrounded conductor is often called the ___. ✔✔ANSWER✔✔hot
Drawing ___ in Figure 112.415 is a framed locking (not key-lock) type
switch. ✔✔ANSWER✔✔Not D.VI or E.None of these
EXPECTED QUESTION AND CORRECT ANSWER FROM VERIFIED
SOURCES RATED A GRADE.
What type of switch would you use to control a lighting load from one
location only? ✔✔ANSWER✔✔Single pole
SPST is an abbreviation for ___. ✔✔ANSWER✔✔Single Pole-Single
Throw
The neutral conductor of a 120-volt circuit is referred to as the ___
conductor in the NEC®. ✔✔ANSWER✔✔grounded
The "hot" conductor of a circuit is referred to as the ___ conductor in
the NEC®. ✔✔ANSWER✔✔ungrounded
When installed as the neutral for a 120-volt circuit, the neutral is
considered to be a current-carrying conductor. ✔✔ANSWER✔✔True
Which of the following is an example of a "device?"
✔✔ANSWER✔✔GFCI receptacle
The color of the insulation of a neutral conductor that is 8 AWG shall be
___.
,I. white II. bare III. gray ✔✔ANSWER✔✔I or III only
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. ✔✔ANSWER✔✔3
What conductor in a circuit cannot be marked with a color of white or
gray?
I. grounded II. equipment grounding III. ungrounded ✔✔ANSWER✔✔II
& III only
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 ✔✔ANSWER✔✔I or II or III
What conductor in a circuit can be marked with a green color?
I. grounded II. equipment grounding III. ungrounded ✔✔ANSWER✔✔II
only
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 ___. ✔✔ANSWER✔✔must have
colored insulation (not green or white or gray)
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. ✔✔ANSWER✔✔N/A
For stairway lighting, a typical installation is to install a 3-way switching
system. For a commercial building, ___ for stairway lighting control.
✔✔ANSWER✔✔there are no NEC® requirements
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). ✔✔ANSWER✔✔IV only
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). ✔✔ANSWER✔✔none of these
, 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).
✔✔ANSWER✔✔Not I & II only
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).
✔✔ANSWER✔✔B , 2nd option pic
Which of these is the symbol used for a 4-way switch?
✔✔ANSWER✔✔c.$4
Lighted handle toggle switches utilize a neon lamp that is illuminated
when the switch is in the ___ position. ✔✔ANSWER✔✔b.OFF
The ungrounded conductor is often called the ___. ✔✔ANSWER✔✔hot
Drawing ___ in Figure 112.415 is a framed locking (not key-lock) type
switch. ✔✔ANSWER✔✔Not D.VI or E.None of these
