IEC Year 2 Part 4 | Newest Questions and
Answers | Updated 2026 | Complete
Review
• What is the allowable ampacity for 18 AWG fixture wire? -✓✓ 6 amperes
• Panelboards equipped with snap switches rated ___ amperes or less shall have
overcurrent protection of 200 amperes or less. -✓✓ 30
• The minumum clearance between a surface mounted fluorescent luminaire installed
on the wall above the door and the nearest point of a storage space in a clothes closet
is ___. -✓✓ 6 inches
• A recessed luminaire that is not identified for contact with insulation shall have all
recessed parts spaced not less than ___ from combustible materials. -✓✓ 1/2"
• A plug with a two-foot-long cord is permitted for a ___. -✓✓ waste disposer
• Plug-in-type overcurrent protection devices or plug-in type main lug assemblies that
are ___ and used to terminate field-installed ungrounded supply conductors shall be
secured in place by an addtional fastener that requires other than a pull to release the
device from the mounting means on the panel. -✓✓ backfed
• A snap switch shall not be grouped or ganged in enclosures with other snap switches,
receptacles or similiar devices, unless they are arranged so that the voltage between
adjacent devices does not exceed ___, or unless they are installed in enclosures
equipped with identified, securely installed barriers between adjacent devices. -✓✓ 300
volts
• A non-grounding-type receptacle(s) shall be permitted to be replaced with a ground-
fault interupter-type of receptacle(s). These receptacles or their cover plates shall be
marked ___. -✓✓ No equipment ground
• Tamper-resistant receptacles are not required in ___. -✓✓ correctional facilities
• In which location is lighting track permitted? -✓✓ 4 feet above the floor operating on 24
volts.
• Three-way and four-way switches shall be wired so that all switching is done only in
the ___ conductors. -✓✓ ungrounded
,• The identification of the grounded conductor in a flexible cord shall be permitted to be
by ___. -✓✓ any color braid with contrasting tracer
• Type SO cord has ___ insulation. -✓✓ thermoset
• Ampacities for flexible cords are determined using ___ in the NEC®. -✓✓ Section
400.5
• Flexible cords shall be connected to devices and to fittings so that tension will not be
transmitted to joints or terminal screws. This shall be accomplished by ___. -✓✓ any of
these
• The largest 2-pole circuit breaker that can be used to protect a 12 AWG copper Type
SJO flexible cord serving a single-phase load is ___ A. -✓✓ 25
• Flexible cords and cables shall NOT be ___. -✓✓ run through holes in walls
• What is the maximum allowable ampacity of 14/2 AWG SJT cord? -✓✓ 18 amperes
• Flexible cords ___ AWG and larger are used to supply approved appliances and are
considered protected from overcurrent by overcurrent devices. -✓✓ 18
• Electric vehicle cable type EVJ ___. I. is available in sizes 18 AWG to 500 kcmilII. is
rated for extra hard usageIII. has thermoset insulation -✓✓ III only
• The largest 1-pole circuit breaker that can be used to protect a 14 AWG copper Type
SO flexible cord is ___ A. -✓✓ 15
• Ampacity of fixture wire is determined ___. -✓✓ from a table in Table 402.5 of the
Code
• Scenario 230.28 Motor Nameplate Information: 5 hp 208-230/460-V 3Ø Branch Circuit
Supply: 3-pole breaker in a 120/208-V, 3-ph, 4-W panel For the motor in Scenario
230.28, the minimum size SO cord permitted contains ___ AWG conductors. -✓✓ 11
• A 5-gang box and a partition are shown above in Figure 210.5. The box will contain
single-pole switches A, B, C, D & E that are fed from the following circuits that originate
in a 277/480-volt, 3Ø, 4-wire panelboard:Switches A and B are fed from Circuit
1Switches C and D are fed from Circuit 7Switch E is fed from Circuit 10The NEC®
requires that partitions be installed between switches ___.I. A & B II. B & C III. C & D IV.
D & E -✓✓ IV only
• For lighting circuits, NEC® Section 404.2(C) requires a(n) ___ conductor to be
provided in each switch box or enclosure. -✓✓ grounded
,• Refer to Figure 210.19. If the incoming service is 120/208, the NEC® permits the
panelboard to be rated for ___ volts. I. 250 II. 600 -✓✓ either I or II
• The receptacle, shown at II in Figure 211.9, will be installed in a metal box. The box
will be connected to the panelboard with PVC. The minimum number of conductors that
are required to be pulled into the PVC is ___. -✓✓ four
• If a common-trip 2-pole breaker is used for a 1Ø, 208-volt circuit, ___.I. both "hots" will
open when a short circuit or ground fault occursII. both "hots" can be manually opened -
✓✓ both I and II
• Where (snap) switches are installed in multigang boxes without permanent barriers
(partitions) the maximum voltage between adjacent switches is ___ volts. -✓✓ 300
• The phase arrangement on 3-phase buses shall be A, B, C from ___, as viewed from
the front of the switchboard or panelboard. I. front to back II. top to bottom III. left to right
-✓✓ I, II, and III
• A switchboard is fed from a 3-phase, 4-wire, delta-connected system. The ___ phase
shall be the phase having the higher voltage to ground. -✓✓ B
• Refer to Figure 210.6, shown above. The conductors connected to the terminal lugs
are 350 kcmil. The minimum wire bending space required at I is ___ inches. These lugs
are NOT removable. -✓✓ 5
• Refer to Figure 210.6, shown above. The conductors connected to the terminal lugs
are 350 kcmil. The minimum wire bending space required at II is ___ inches. These lugs
are of the lay-in type. -✓✓ 9
• Article ___ in the NEC® concerns switchboards. A switchboard is shown above in
Figure 210.9. -✓✓ 408
• In general, switches shall be so wired that all switching is done in the ___ conductor. -
✓✓ ungrounded
• In a 3Ø switchboard that has horizontal busbars, the AØ feeder conductor is
connected to the ___ busbar. -✓✓ top
• Wiring devices that are marked with CO/ALR are suitable for use with ___
conductors.I. aluminum II. copper III. copper-clad aluminum -✓✓ I, II & III
• A receptacle with a green dot on an ivory face would be a(n) ___ receptacle. -✓✓
hospital grade
, • A cover that maintains the weatherproof integrity of the receptacle ___ to be installed
when an outdoor receptacle is used for the permanent connection of a cord from a lawn
sprinkler system. -✓✓ is required
• Three-way and four-way switches shall be wired so that all switching is done ___. -✓✓
only in the ungrounded circuit conductor
• Receptacle ___, shown below, is rated at 20 amps. -✓✓ a
• A 120V clothes dryer receptacle located in a finished basement laundry room requires
the following: -✓✓ Both
• Shown above is 42-Circuit Panelboard HB. It is fed from a 277/480-volt, 3Ø, 4-wire
utility transformer bank. Circuit number 41 is connected to ___. -✓✓ CØ
• Shown above is 42-Circuit Panelboard L. It is fed from a 120/240-volt, 1Ø, 3-wire utility
transformer. Circuit number 42 is connected to ___. -✓✓ AØ
• The main service disconnect handle (fused pullout or main breaker) shall not be
positioned higher than ___ above the floor. -✓✓ 6 ft-7 in
• GFCI-protected receptacles ___ permitted to be installed within a tub or shower space.
-✓✓ are not
• When raised covers ("industrial covers") are used for receptacles, -✓✓ No
• Isolated ground receptacles are identified by ___. -✓✓ an orange triangle
• Handholes are not required in metal parking lot light poles if the base is hinged and the
pole is ___ feet or less in height. -✓✓ 20
• According to the NEC®, recessed luminaires (fixtures) that are identified for contact
with insulation shall have all recessed parts at least ___ from combustible materials. -
✓✓ 0 inches
• Luminaires in clothes closets shall be ___. I. surface-mounted or recessed
incandescent luminaires or LED with completely enclosed lampsII. surface-mounted or
recessed fluorescent luminairesIII. pendant luminaires -✓✓ I & II only
• Thermal insulation shall not be installed above or within ___ inch(es) of the side of a
recessed luminaire. This is a type Non-IC luminaire. -✓✓ 3
Answers | Updated 2026 | Complete
Review
• What is the allowable ampacity for 18 AWG fixture wire? -✓✓ 6 amperes
• Panelboards equipped with snap switches rated ___ amperes or less shall have
overcurrent protection of 200 amperes or less. -✓✓ 30
• The minumum clearance between a surface mounted fluorescent luminaire installed
on the wall above the door and the nearest point of a storage space in a clothes closet
is ___. -✓✓ 6 inches
• A recessed luminaire that is not identified for contact with insulation shall have all
recessed parts spaced not less than ___ from combustible materials. -✓✓ 1/2"
• A plug with a two-foot-long cord is permitted for a ___. -✓✓ waste disposer
• Plug-in-type overcurrent protection devices or plug-in type main lug assemblies that
are ___ and used to terminate field-installed ungrounded supply conductors shall be
secured in place by an addtional fastener that requires other than a pull to release the
device from the mounting means on the panel. -✓✓ backfed
• A snap switch shall not be grouped or ganged in enclosures with other snap switches,
receptacles or similiar devices, unless they are arranged so that the voltage between
adjacent devices does not exceed ___, or unless they are installed in enclosures
equipped with identified, securely installed barriers between adjacent devices. -✓✓ 300
volts
• A non-grounding-type receptacle(s) shall be permitted to be replaced with a ground-
fault interupter-type of receptacle(s). These receptacles or their cover plates shall be
marked ___. -✓✓ No equipment ground
• Tamper-resistant receptacles are not required in ___. -✓✓ correctional facilities
• In which location is lighting track permitted? -✓✓ 4 feet above the floor operating on 24
volts.
• Three-way and four-way switches shall be wired so that all switching is done only in
the ___ conductors. -✓✓ ungrounded
,• The identification of the grounded conductor in a flexible cord shall be permitted to be
by ___. -✓✓ any color braid with contrasting tracer
• Type SO cord has ___ insulation. -✓✓ thermoset
• Ampacities for flexible cords are determined using ___ in the NEC®. -✓✓ Section
400.5
• Flexible cords shall be connected to devices and to fittings so that tension will not be
transmitted to joints or terminal screws. This shall be accomplished by ___. -✓✓ any of
these
• The largest 2-pole circuit breaker that can be used to protect a 12 AWG copper Type
SJO flexible cord serving a single-phase load is ___ A. -✓✓ 25
• Flexible cords and cables shall NOT be ___. -✓✓ run through holes in walls
• What is the maximum allowable ampacity of 14/2 AWG SJT cord? -✓✓ 18 amperes
• Flexible cords ___ AWG and larger are used to supply approved appliances and are
considered protected from overcurrent by overcurrent devices. -✓✓ 18
• Electric vehicle cable type EVJ ___. I. is available in sizes 18 AWG to 500 kcmilII. is
rated for extra hard usageIII. has thermoset insulation -✓✓ III only
• The largest 1-pole circuit breaker that can be used to protect a 14 AWG copper Type
SO flexible cord is ___ A. -✓✓ 15
• Ampacity of fixture wire is determined ___. -✓✓ from a table in Table 402.5 of the
Code
• Scenario 230.28 Motor Nameplate Information: 5 hp 208-230/460-V 3Ø Branch Circuit
Supply: 3-pole breaker in a 120/208-V, 3-ph, 4-W panel For the motor in Scenario
230.28, the minimum size SO cord permitted contains ___ AWG conductors. -✓✓ 11
• A 5-gang box and a partition are shown above in Figure 210.5. The box will contain
single-pole switches A, B, C, D & E that are fed from the following circuits that originate
in a 277/480-volt, 3Ø, 4-wire panelboard:Switches A and B are fed from Circuit
1Switches C and D are fed from Circuit 7Switch E is fed from Circuit 10The NEC®
requires that partitions be installed between switches ___.I. A & B II. B & C III. C & D IV.
D & E -✓✓ IV only
• For lighting circuits, NEC® Section 404.2(C) requires a(n) ___ conductor to be
provided in each switch box or enclosure. -✓✓ grounded
,• Refer to Figure 210.19. If the incoming service is 120/208, the NEC® permits the
panelboard to be rated for ___ volts. I. 250 II. 600 -✓✓ either I or II
• The receptacle, shown at II in Figure 211.9, will be installed in a metal box. The box
will be connected to the panelboard with PVC. The minimum number of conductors that
are required to be pulled into the PVC is ___. -✓✓ four
• If a common-trip 2-pole breaker is used for a 1Ø, 208-volt circuit, ___.I. both "hots" will
open when a short circuit or ground fault occursII. both "hots" can be manually opened -
✓✓ both I and II
• Where (snap) switches are installed in multigang boxes without permanent barriers
(partitions) the maximum voltage between adjacent switches is ___ volts. -✓✓ 300
• The phase arrangement on 3-phase buses shall be A, B, C from ___, as viewed from
the front of the switchboard or panelboard. I. front to back II. top to bottom III. left to right
-✓✓ I, II, and III
• A switchboard is fed from a 3-phase, 4-wire, delta-connected system. The ___ phase
shall be the phase having the higher voltage to ground. -✓✓ B
• Refer to Figure 210.6, shown above. The conductors connected to the terminal lugs
are 350 kcmil. The minimum wire bending space required at I is ___ inches. These lugs
are NOT removable. -✓✓ 5
• Refer to Figure 210.6, shown above. The conductors connected to the terminal lugs
are 350 kcmil. The minimum wire bending space required at II is ___ inches. These lugs
are of the lay-in type. -✓✓ 9
• Article ___ in the NEC® concerns switchboards. A switchboard is shown above in
Figure 210.9. -✓✓ 408
• In general, switches shall be so wired that all switching is done in the ___ conductor. -
✓✓ ungrounded
• In a 3Ø switchboard that has horizontal busbars, the AØ feeder conductor is
connected to the ___ busbar. -✓✓ top
• Wiring devices that are marked with CO/ALR are suitable for use with ___
conductors.I. aluminum II. copper III. copper-clad aluminum -✓✓ I, II & III
• A receptacle with a green dot on an ivory face would be a(n) ___ receptacle. -✓✓
hospital grade
, • A cover that maintains the weatherproof integrity of the receptacle ___ to be installed
when an outdoor receptacle is used for the permanent connection of a cord from a lawn
sprinkler system. -✓✓ is required
• Three-way and four-way switches shall be wired so that all switching is done ___. -✓✓
only in the ungrounded circuit conductor
• Receptacle ___, shown below, is rated at 20 amps. -✓✓ a
• A 120V clothes dryer receptacle located in a finished basement laundry room requires
the following: -✓✓ Both
• Shown above is 42-Circuit Panelboard HB. It is fed from a 277/480-volt, 3Ø, 4-wire
utility transformer bank. Circuit number 41 is connected to ___. -✓✓ CØ
• Shown above is 42-Circuit Panelboard L. It is fed from a 120/240-volt, 1Ø, 3-wire utility
transformer. Circuit number 42 is connected to ___. -✓✓ AØ
• The main service disconnect handle (fused pullout or main breaker) shall not be
positioned higher than ___ above the floor. -✓✓ 6 ft-7 in
• GFCI-protected receptacles ___ permitted to be installed within a tub or shower space.
-✓✓ are not
• When raised covers ("industrial covers") are used for receptacles, -✓✓ No
• Isolated ground receptacles are identified by ___. -✓✓ an orange triangle
• Handholes are not required in metal parking lot light poles if the base is hinged and the
pole is ___ feet or less in height. -✓✓ 20
• According to the NEC®, recessed luminaires (fixtures) that are identified for contact
with insulation shall have all recessed parts at least ___ from combustible materials. -
✓✓ 0 inches
• Luminaires in clothes closets shall be ___. I. surface-mounted or recessed
incandescent luminaires or LED with completely enclosed lampsII. surface-mounted or
recessed fluorescent luminairesIII. pendant luminaires -✓✓ I & II only
• Thermal insulation shall not be installed above or within ___ inch(es) of the side of a
recessed luminaire. This is a type Non-IC luminaire. -✓✓ 3
