Master Electrician Class
#4 cooper & #2 Aluminum - ANS -What is the minimum size Service Conductor allowed for a
dwelling unit
\0.001 inch - ANS -One circular mil is the area of a circle whose diameter is:
\0.622" - ANS -The internal diameter of 1/2"EMT is:
\1 - ANS -At least_____ 125 V, single phase, 15 A or 20 A, duplex with ground-fault circuit
interrupter receptacle shall be provided in each elevator machine room and elevator machinery
space.
\1 1/2" - ANS -Flat:top underfloor raceways over 4 inches, but less 8 inches wide, with a
minimum 1 inch spacing between raceways, shall be covered with concrete to a depth of not
iess than 1 inch. Raceways spaced less that 1 inch apart shall be covered with a concrete to a
depth of
\1,000,000 CM - ANS -6. A round bus-bar one inch in diameter, has a circular mil area of:
\1.5" - ANS -The outside diameter of a threaded rigid conduit is measured to be about two
Inches. The nominal trade size is:
\10 AWG Copper - ANS -7. Service Lateral conductors that supply power to limited loads of a
single branch circuit-such as a small polyphase power, controlled water heaters, and similar
loads-shall not be smaller than
\10 feet - ANS -Nonmetallic cables can enter the top of surface-mounted cabinets, cutout boxes,
and meter socket enclosures through nonflexible raceways not less than 18 in. or more than
______ft in length if all of the required conditions are met.
\10 feet above grade level - ANS -Open conductors which are not service entrance cables shall
not be installed less than which of the following
\10.4 - ANS -The specific resistance of copper wire @ 20° C in ohms per circular mil ft. is
\10' - ANS -Lighting systems operating at 30V or less shall not be·installed within_______of
pools, spas, fountains, or similar locatipns
\1000A - ANS -20. Ground fault protection of equipment shall be provided for solidly grounded
wye electrical services of more than 150 volts-to-ground, but not exceeding 600V
phase-to-phase for each service
disconnecting means rated __________
\1000A - ANS -Ground-fault protection of equipment shall be provided fro solidly grounded wye
electrical services of more than 150 volts-to-ground, but not exceeding 600V phase-to..phase
for each service disconnecting means rated
\115% - ANS -A disconnecting means that serves a hermetic refrigerant motor compressor shall
have an ampere rating of at least percent of the nameplate rated load current or branch circuit
selection current, whichever is greater.
\116 Conductors - ANS -What is the Max number of #6 THHN current carrying conductors in 4"
EMT for general use is
\12 - ANS -How many# 10 conductors can be legally installed in a 4 inch square box, 2 1/8
deep?
, \12 /40 - ANS -Where communications wires and cables and electric light or power conductors
are supported by the same pole and are run paralled to each other in span , the·supply service
drops of 0-750 volts running above and parallel to communications service drops shall have a
minimum separation of _______inches at any point in the
span, including the point of and at their attachment to the building, provided the nongrounded
conductors are insulated and that a clearance of not less than_______ inches is maintained
between the two services at the pole
\12 AWG - ANS -Communications circuits shall have a minimum grounding conductor of
_____AWG
\12 feet - ANS -The verticaI clearance from ground level over a residential driveway for
overhead service conductors not subject to truck traffic and are less than 300 volts to ground
shall be _____ ft:
\12" - ANS -For cord and plug connected electric vehicle supply equipment is used, the
interrupting device of a
listed personnel protection system shall be provided and shall be located in the power supply
cable not more than ______from the attachment plug.
\12" - ANS -Underground service conductors that are not encased in concrete and that are
buried 30 inches or more below grade, shall have their location identified by a warning ribbon
that is placed in the trench at least_______inches above the underground installation for 40KV
\1200 Amperes - ANS -19. When an equipment room houses electrical equipment rated at
LEAST _____or more, the personnel doors intended for entrance to and egress from the
working space, shall open in the direction of egress.
\125% - ANS -Branch circuit conductor that supply a single motor used in a continuous duty
application shall have an ampacity of not less than Percent of the motors full-load current
\12Ft - ANS -6. Overhead feeder conductors shall have a minimum __________ vertical
clearance over residential property and driveways, as well as those commercial areas not
subject to truck traffic, where the voltage is limited to 300 volts-to-ground.
\13 - ANS -How many receptacle outlets are permitted .on a 20A. 120V ircuit in a commercial
building?
\18 feet - ANS -The minimum clearance for overhead feeder conductors not exceeding 600V
that pass over commercial areas Subject to truck traffic is.
\18" - ANS -At least one receptacle outlet shall be installed within of the top of a show window
for each 12 linear feet measured horizontally across its length
\18" - ANS -Receptacle outlets in floors shall not be counted as part of the required
number of receptacle outlets unless located within ______ of the wall
\180 VA - ANS -For other than dwelling occupancies, banks, or office buildings, each receptacle
outlet shall be calculated at
not less than _____ VA.
\1O ohms - ANS -The equivalent value of 0.1 mho is
\2 in of concrete - ANS -Conductors are considered outside a buildings when they are buried
under not less than
\20 amp - ANS -There shall be a minimum of one branch circuit for laundry outlets required by
210.52
#4 cooper & #2 Aluminum - ANS -What is the minimum size Service Conductor allowed for a
dwelling unit
\0.001 inch - ANS -One circular mil is the area of a circle whose diameter is:
\0.622" - ANS -The internal diameter of 1/2"EMT is:
\1 - ANS -At least_____ 125 V, single phase, 15 A or 20 A, duplex with ground-fault circuit
interrupter receptacle shall be provided in each elevator machine room and elevator machinery
space.
\1 1/2" - ANS -Flat:top underfloor raceways over 4 inches, but less 8 inches wide, with a
minimum 1 inch spacing between raceways, shall be covered with concrete to a depth of not
iess than 1 inch. Raceways spaced less that 1 inch apart shall be covered with a concrete to a
depth of
\1,000,000 CM - ANS -6. A round bus-bar one inch in diameter, has a circular mil area of:
\1.5" - ANS -The outside diameter of a threaded rigid conduit is measured to be about two
Inches. The nominal trade size is:
\10 AWG Copper - ANS -7. Service Lateral conductors that supply power to limited loads of a
single branch circuit-such as a small polyphase power, controlled water heaters, and similar
loads-shall not be smaller than
\10 feet - ANS -Nonmetallic cables can enter the top of surface-mounted cabinets, cutout boxes,
and meter socket enclosures through nonflexible raceways not less than 18 in. or more than
______ft in length if all of the required conditions are met.
\10 feet above grade level - ANS -Open conductors which are not service entrance cables shall
not be installed less than which of the following
\10.4 - ANS -The specific resistance of copper wire @ 20° C in ohms per circular mil ft. is
\10' - ANS -Lighting systems operating at 30V or less shall not be·installed within_______of
pools, spas, fountains, or similar locatipns
\1000A - ANS -20. Ground fault protection of equipment shall be provided for solidly grounded
wye electrical services of more than 150 volts-to-ground, but not exceeding 600V
phase-to-phase for each service
disconnecting means rated __________
\1000A - ANS -Ground-fault protection of equipment shall be provided fro solidly grounded wye
electrical services of more than 150 volts-to-ground, but not exceeding 600V phase-to..phase
for each service disconnecting means rated
\115% - ANS -A disconnecting means that serves a hermetic refrigerant motor compressor shall
have an ampere rating of at least percent of the nameplate rated load current or branch circuit
selection current, whichever is greater.
\116 Conductors - ANS -What is the Max number of #6 THHN current carrying conductors in 4"
EMT for general use is
\12 - ANS -How many# 10 conductors can be legally installed in a 4 inch square box, 2 1/8
deep?
, \12 /40 - ANS -Where communications wires and cables and electric light or power conductors
are supported by the same pole and are run paralled to each other in span , the·supply service
drops of 0-750 volts running above and parallel to communications service drops shall have a
minimum separation of _______inches at any point in the
span, including the point of and at their attachment to the building, provided the nongrounded
conductors are insulated and that a clearance of not less than_______ inches is maintained
between the two services at the pole
\12 AWG - ANS -Communications circuits shall have a minimum grounding conductor of
_____AWG
\12 feet - ANS -The verticaI clearance from ground level over a residential driveway for
overhead service conductors not subject to truck traffic and are less than 300 volts to ground
shall be _____ ft:
\12" - ANS -For cord and plug connected electric vehicle supply equipment is used, the
interrupting device of a
listed personnel protection system shall be provided and shall be located in the power supply
cable not more than ______from the attachment plug.
\12" - ANS -Underground service conductors that are not encased in concrete and that are
buried 30 inches or more below grade, shall have their location identified by a warning ribbon
that is placed in the trench at least_______inches above the underground installation for 40KV
\1200 Amperes - ANS -19. When an equipment room houses electrical equipment rated at
LEAST _____or more, the personnel doors intended for entrance to and egress from the
working space, shall open in the direction of egress.
\125% - ANS -Branch circuit conductor that supply a single motor used in a continuous duty
application shall have an ampacity of not less than Percent of the motors full-load current
\12Ft - ANS -6. Overhead feeder conductors shall have a minimum __________ vertical
clearance over residential property and driveways, as well as those commercial areas not
subject to truck traffic, where the voltage is limited to 300 volts-to-ground.
\13 - ANS -How many receptacle outlets are permitted .on a 20A. 120V ircuit in a commercial
building?
\18 feet - ANS -The minimum clearance for overhead feeder conductors not exceeding 600V
that pass over commercial areas Subject to truck traffic is.
\18" - ANS -At least one receptacle outlet shall be installed within of the top of a show window
for each 12 linear feet measured horizontally across its length
\18" - ANS -Receptacle outlets in floors shall not be counted as part of the required
number of receptacle outlets unless located within ______ of the wall
\180 VA - ANS -For other than dwelling occupancies, banks, or office buildings, each receptacle
outlet shall be calculated at
not less than _____ VA.
\1O ohms - ANS -The equivalent value of 0.1 mho is
\2 in of concrete - ANS -Conductors are considered outside a buildings when they are buried
under not less than
\20 amp - ANS -There shall be a minimum of one branch circuit for laundry outlets required by
210.52
