Electrifying Foundations: Your Essential Guide to
Mastering Chapter 1 of Year 2 Electrical Engineering,
A Comprehensive Exam Study Guide 100% Certified
and Verified by Expert.
Latest Updated 2025/2026.
The purpose of the NEC is the practical safeguarding of __ from hazards arising from the use
of electricity. - ansPeoples and buildings
Annex H in the NEC - ansIs to used for information on unless specifically adopted by the
local AHJ
A continuous load is any load that expected to operate for - ans3 hours or more.
To assist in the proper application of the NEC a term that appears in more than one article is
defined in - ansArticle 100
A door chime is an example of a device - ansFalse
Which of the following statements is true for an individual branch circuit that is run in a
conduit with other circuits? - ansIt can charge a neutral with another circuit
The exact code reference that requires electrical equipment to be securely fastened to the
surface on which it is mounted is - ans110.13(A)
The NEC permits the attachment cord and plug that is attached to an air compressor to be
used as the disconnecting means. How does section 100.22 require that this disconnecting
means be identified? - ansIt's purpose is obvious and not required to be marked.
B-phase on a 120/240 volt 3-ph, 4-wire system is called the ___ leg. - ansHigh stinger wild.
Section __ in the NEC specifies that all 120-volt receptacles in the kitchen of a cafeteria are
to be gfci protected - ans210.8(B)(2)
How many 20-amp kitchen countertop Receptacle - ans0
In NEC article 500.8, equipment marked for use in a class 1 locations and has a marked
temperature classification of T3B is suitable for use in environments with a maximum surface
temperature of - ans329F
Protection against __ is addressed by the requirements in the NEC - ansFault currents effects,
Thermal, Electric shock.
Which of the following installations Are covered by the NEC? - ansNone of the above
Is the conduit between the lighting peoples covered by the NEC? The street lightning and
conduit were installed in the utility easement as shown in the drawing a the right and is under
the control of CenterPoint energy.(utility company) - ansNo.
Chapter 8 in the nec covers ___ and is independent of the other nec chapters. Provisions in
other chapters do not apply unless directly referenced in chapter 8 - ansCommunication
systems
The authority having jurisdiction has the responsibility - ansFor enforcing the NEC, For
approving equipment installations, also for granting special permission
Annex ___ in the NEC contains examples of load calculations for dwellings - ansD
How long does something need to run to be a continuous load - ans3 hours
___ equipment is constructed so that water will not enter it. - ansWatertight
A 1900 (4_square or 4x4 square) box with a cover that is installed above a drywall ceiling is
considered - ansNot accessible
A fluorescent luminaire is an example of a device - ansFalse
The illuminated marquee sign for a theatre would be considered to be a ___ load -
ansContinuous
If a motor and the disconnecting means ( safety switch) are located in the same room and 60
feet apart, these___ considered to be within sight (of each other) per the NEC - ansAre not
Which of the following conductor materials are recognized by the NEC - ansAluminum,
copper, copper-clad aluminum (all of these)
,Electrifying Foundations: Your Essential Guide to
Mastering Chapter 1 of Year 2 Electrical Engineering,
A Comprehensive Exam Study Guide 100% Certified
and Verified by Expert.
Latest Updated 2025/2026.
Improper electrical terminations lead to increased - ansCircuit resistance, also voltage
dropped across the terminations
Some wire nuts are listed for direct burial underground - ansTrue
Per section 110.26(A)(1) in the NEC, where the wall opposite a panel board is a metal door
condition ___ applies to the clearance requirements - ans2
The neutral of an electrical system is always carrying the unbalanced current of that system -
ansTrue
The NEC permits the insulation for an ungrounded conductor to be ___in color. -
ansAnything that isn't green white or gray
All 120- volt kitchen receptacles in the kitchen of a school cafeteria are required by the NEC
to be GFCI protected - ansTrue
Refer to NEC 500.8 generally, equipment for use in hazardous locations shall be marked to
show the environment for which it has been evaluated. Equipment that is not marked to
indicate a division or is marked as division 1 is ____ - ansSuitable for both divisions 1 and 2
The class and material group classification where combustible metal dusts such as
magnesium are present is - ansClass 2, Group E
In a hazardous location, class 1 is a location that - ansA contains flammable gases
In a hazardous locations, class 3 is a location that - ansContains ignitable fibers or flyings
A location in which easily ignitable fires are manufactured is a - ansClass 3, division 1
A location in which ignitable flammable, flammable liquidproduced vapors - ansClass 1
Is the amount of electricity required at a given time - ansDemand
For the calculations required in article 220, the total area of an occupancy is determined from
the __ dimensions of the building or structure - ansOutside
Feeders for several motors are calculated using the sum of the table flics of all motors plus
____ % of the largest motor - ans125%
For a single-family dwelling with six appliance load, demand factors may be applied to ___
of these loads using the standard calculation - ansAll six
Using the standard calculation, four or more appliance which are fastened-in- place in a one-
family dwelling are computed at___ of the total load for all appliances. - ans75%
Service equipment is the "point of division" between the ___ and ___. - anssupply (line) side,
load side
When planning a service installation, which of the following should be considered? - ansall
of these
A panelboard that is marked "suitable only for use as service equipment" ___. - ansusually
has the neutral bar factory bonded to the enclosure
A service (meter and fused safety switch) is built on a wooden pole that is located 200' from
the building it serves. Does the NEC® consider the pole to be a structure? - ansYes
The smallest copper service lateral conductors that can be installed for a service are ___
AWG. - ans8
Any equipment that is installed between the utility supply and the service overcurrent
protective device(s) is on the ___ side of the service. - anssupply (or line)
When special permission is granted by the AHJ, this is in the form of - ansa written document
Where a service (meter and fused safety switch) is built on a rack that is located 200' from the
building it serves, the rack is considered a structure per the NEC®. - ansTrue
, Electrifying Foundations: Your Essential Guide to
Mastering Chapter 1 of Year 2 Electrical Engineering,
A Comprehensive Exam Study Guide 100% Certified
and Verified by Expert.
Latest Updated 2025/2026.
The service point is located at the ___. The Power Company owns the pole-mounted
transformer and has provided power to a customer-owned pad-mounted transformer. From
this transformer, a service lateral was installed to the meter socket on the customer's building.
- anspole-mounted transformer
A building or structure can have a service separate from the main service where it supplies -
ansa standby system, fire pump
The smallest copper overhead service conductors that can be installed for a service are ___. -
ans8
For a service, the grounded conductor must be - ansable to carry the load, at least as large as
required by Table 250.102(C)(1)
The smallest THHN/THWN copper grounded conductor that can be installed for a service is
___ when the ungrounded conductors are 1/0 THWN/THHN copper. - ans6
Triplex service-drop conductors of 120/240-volts, 1Ø where passing over a sidewalk must
maintain a minimum clearance of ___ feet above final grade. - ans10
The minimum clearance above finished grade for overhead service conductors is ___ feet.
The service is 120/240-volt, 3-ph, 4-wire. The span is over the parking area adjacent to an
office building. The driveway into the parking area has a metal bar hanging over the
driveway. The bar is set at 8 feet above the driveway and prohibits the entrance of trucks. The
service drop uses quadruplex. - ans12
A service is to be built on the base support pole of a single-sided billboard. One branch
circuit provides power to the lights and will be loaded to 6 amps. The minimum ampacity for
the ungrounded service conductors is ___ amps. - ans15
A one-family dwelling has an initial net computed load of 9.5 kVA and five branch circuits.
The minimum ampacity for the ungrounded, 120/240-volt, 3-wire service conductors is ___
amps. - ans100
Which of these wiring methods is NOT permitted to be used for service-entrance conductors?
- ansAC cable
A service lateral is to be installed as direct-buried cable in the bottom of a trench that is 42
inches below finish grade. The trench is to be filled with dirt only. A warning ribbon is
required to be installed in the trench at a maximum depth of ___ inches below finish grade. -
ans30
Underground service laterals that are installed as direct buried cable and covered with 42
inches of dirt shall also have a warning ribbon installed at least ___ inches above the cable. -
ans12
Underground service laterals that are installed as USE cable and covered with 36 inches of
dirt shall also have a warning ribbon installed above the conduit at a maximum depth of ___
inches below finish grade. - ans24
The maximum number of 3-pole circuit breakers used as service disconnects permitted in a
3Ø panelboard is ____. - ans6
Service equipment shall have an ampere interrupting rating (AIR) ___ the fault current
available at the service location. - ansgreater than or equal to
A service disconnecting means shall be installed at a(n) ___ location either outside of a
building or structure or inside nearest the point of entrance of the service conductors. -
ansreadily accessible
Mastering Chapter 1 of Year 2 Electrical Engineering,
A Comprehensive Exam Study Guide 100% Certified
and Verified by Expert.
Latest Updated 2025/2026.
The purpose of the NEC is the practical safeguarding of __ from hazards arising from the use
of electricity. - ansPeoples and buildings
Annex H in the NEC - ansIs to used for information on unless specifically adopted by the
local AHJ
A continuous load is any load that expected to operate for - ans3 hours or more.
To assist in the proper application of the NEC a term that appears in more than one article is
defined in - ansArticle 100
A door chime is an example of a device - ansFalse
Which of the following statements is true for an individual branch circuit that is run in a
conduit with other circuits? - ansIt can charge a neutral with another circuit
The exact code reference that requires electrical equipment to be securely fastened to the
surface on which it is mounted is - ans110.13(A)
The NEC permits the attachment cord and plug that is attached to an air compressor to be
used as the disconnecting means. How does section 100.22 require that this disconnecting
means be identified? - ansIt's purpose is obvious and not required to be marked.
B-phase on a 120/240 volt 3-ph, 4-wire system is called the ___ leg. - ansHigh stinger wild.
Section __ in the NEC specifies that all 120-volt receptacles in the kitchen of a cafeteria are
to be gfci protected - ans210.8(B)(2)
How many 20-amp kitchen countertop Receptacle - ans0
In NEC article 500.8, equipment marked for use in a class 1 locations and has a marked
temperature classification of T3B is suitable for use in environments with a maximum surface
temperature of - ans329F
Protection against __ is addressed by the requirements in the NEC - ansFault currents effects,
Thermal, Electric shock.
Which of the following installations Are covered by the NEC? - ansNone of the above
Is the conduit between the lighting peoples covered by the NEC? The street lightning and
conduit were installed in the utility easement as shown in the drawing a the right and is under
the control of CenterPoint energy.(utility company) - ansNo.
Chapter 8 in the nec covers ___ and is independent of the other nec chapters. Provisions in
other chapters do not apply unless directly referenced in chapter 8 - ansCommunication
systems
The authority having jurisdiction has the responsibility - ansFor enforcing the NEC, For
approving equipment installations, also for granting special permission
Annex ___ in the NEC contains examples of load calculations for dwellings - ansD
How long does something need to run to be a continuous load - ans3 hours
___ equipment is constructed so that water will not enter it. - ansWatertight
A 1900 (4_square or 4x4 square) box with a cover that is installed above a drywall ceiling is
considered - ansNot accessible
A fluorescent luminaire is an example of a device - ansFalse
The illuminated marquee sign for a theatre would be considered to be a ___ load -
ansContinuous
If a motor and the disconnecting means ( safety switch) are located in the same room and 60
feet apart, these___ considered to be within sight (of each other) per the NEC - ansAre not
Which of the following conductor materials are recognized by the NEC - ansAluminum,
copper, copper-clad aluminum (all of these)
,Electrifying Foundations: Your Essential Guide to
Mastering Chapter 1 of Year 2 Electrical Engineering,
A Comprehensive Exam Study Guide 100% Certified
and Verified by Expert.
Latest Updated 2025/2026.
Improper electrical terminations lead to increased - ansCircuit resistance, also voltage
dropped across the terminations
Some wire nuts are listed for direct burial underground - ansTrue
Per section 110.26(A)(1) in the NEC, where the wall opposite a panel board is a metal door
condition ___ applies to the clearance requirements - ans2
The neutral of an electrical system is always carrying the unbalanced current of that system -
ansTrue
The NEC permits the insulation for an ungrounded conductor to be ___in color. -
ansAnything that isn't green white or gray
All 120- volt kitchen receptacles in the kitchen of a school cafeteria are required by the NEC
to be GFCI protected - ansTrue
Refer to NEC 500.8 generally, equipment for use in hazardous locations shall be marked to
show the environment for which it has been evaluated. Equipment that is not marked to
indicate a division or is marked as division 1 is ____ - ansSuitable for both divisions 1 and 2
The class and material group classification where combustible metal dusts such as
magnesium are present is - ansClass 2, Group E
In a hazardous location, class 1 is a location that - ansA contains flammable gases
In a hazardous locations, class 3 is a location that - ansContains ignitable fibers or flyings
A location in which easily ignitable fires are manufactured is a - ansClass 3, division 1
A location in which ignitable flammable, flammable liquidproduced vapors - ansClass 1
Is the amount of electricity required at a given time - ansDemand
For the calculations required in article 220, the total area of an occupancy is determined from
the __ dimensions of the building or structure - ansOutside
Feeders for several motors are calculated using the sum of the table flics of all motors plus
____ % of the largest motor - ans125%
For a single-family dwelling with six appliance load, demand factors may be applied to ___
of these loads using the standard calculation - ansAll six
Using the standard calculation, four or more appliance which are fastened-in- place in a one-
family dwelling are computed at___ of the total load for all appliances. - ans75%
Service equipment is the "point of division" between the ___ and ___. - anssupply (line) side,
load side
When planning a service installation, which of the following should be considered? - ansall
of these
A panelboard that is marked "suitable only for use as service equipment" ___. - ansusually
has the neutral bar factory bonded to the enclosure
A service (meter and fused safety switch) is built on a wooden pole that is located 200' from
the building it serves. Does the NEC® consider the pole to be a structure? - ansYes
The smallest copper service lateral conductors that can be installed for a service are ___
AWG. - ans8
Any equipment that is installed between the utility supply and the service overcurrent
protective device(s) is on the ___ side of the service. - anssupply (or line)
When special permission is granted by the AHJ, this is in the form of - ansa written document
Where a service (meter and fused safety switch) is built on a rack that is located 200' from the
building it serves, the rack is considered a structure per the NEC®. - ansTrue
, Electrifying Foundations: Your Essential Guide to
Mastering Chapter 1 of Year 2 Electrical Engineering,
A Comprehensive Exam Study Guide 100% Certified
and Verified by Expert.
Latest Updated 2025/2026.
The service point is located at the ___. The Power Company owns the pole-mounted
transformer and has provided power to a customer-owned pad-mounted transformer. From
this transformer, a service lateral was installed to the meter socket on the customer's building.
- anspole-mounted transformer
A building or structure can have a service separate from the main service where it supplies -
ansa standby system, fire pump
The smallest copper overhead service conductors that can be installed for a service are ___. -
ans8
For a service, the grounded conductor must be - ansable to carry the load, at least as large as
required by Table 250.102(C)(1)
The smallest THHN/THWN copper grounded conductor that can be installed for a service is
___ when the ungrounded conductors are 1/0 THWN/THHN copper. - ans6
Triplex service-drop conductors of 120/240-volts, 1Ø where passing over a sidewalk must
maintain a minimum clearance of ___ feet above final grade. - ans10
The minimum clearance above finished grade for overhead service conductors is ___ feet.
The service is 120/240-volt, 3-ph, 4-wire. The span is over the parking area adjacent to an
office building. The driveway into the parking area has a metal bar hanging over the
driveway. The bar is set at 8 feet above the driveway and prohibits the entrance of trucks. The
service drop uses quadruplex. - ans12
A service is to be built on the base support pole of a single-sided billboard. One branch
circuit provides power to the lights and will be loaded to 6 amps. The minimum ampacity for
the ungrounded service conductors is ___ amps. - ans15
A one-family dwelling has an initial net computed load of 9.5 kVA and five branch circuits.
The minimum ampacity for the ungrounded, 120/240-volt, 3-wire service conductors is ___
amps. - ans100
Which of these wiring methods is NOT permitted to be used for service-entrance conductors?
- ansAC cable
A service lateral is to be installed as direct-buried cable in the bottom of a trench that is 42
inches below finish grade. The trench is to be filled with dirt only. A warning ribbon is
required to be installed in the trench at a maximum depth of ___ inches below finish grade. -
ans30
Underground service laterals that are installed as direct buried cable and covered with 42
inches of dirt shall also have a warning ribbon installed at least ___ inches above the cable. -
ans12
Underground service laterals that are installed as USE cable and covered with 36 inches of
dirt shall also have a warning ribbon installed above the conduit at a maximum depth of ___
inches below finish grade. - ans24
The maximum number of 3-pole circuit breakers used as service disconnects permitted in a
3Ø panelboard is ____. - ans6
Service equipment shall have an ampere interrupting rating (AIR) ___ the fault current
available at the service location. - ansgreater than or equal to
A service disconnecting means shall be installed at a(n) ___ location either outside of a
building or structure or inside nearest the point of entrance of the service conductors. -
ansreadily accessible
