Journeyman Electrician Exam Questions and Answers
2025/2026
Where K=12.9, what is the approximate voltage-drop on a circuit where an 80-
ampere, 240-volt, single-phase load is supplied with size 3 AWG copper
conductors with THWN insulation, and placed 200 feet from a panelboard?
*Chapter 9 tables, table 8 conductor properties
(pg. 70-689) - CORRECT ANSWER-7.84 volts
voltage-drop formula
VD=2KID VD=2 x 12.9 x 80amps x 200ft. =7.84
CM 52.620 CM
Given the following information, what is the maximum approximate distance a
single-phase, 240-volt, 42-ampere load can be located from a panelboard?
*copper conductors - K = 12.9
*size 8 AWG THWN/THHN conductors are used
*limit voltage drop to 3%
*Chapter 9 tables, table 8 conductor properties
,(pg. 70-689) - CORRECT ANSWER-50 feet
Distance formula
1st. find allowable VD - 240volts x 3% = 7.2volts
D=CM x VD
D=16,510 x 7.2=118,872=109.7feet
2 x K X I 2 X 12.9 X 42
What is the minimum allowable trade size intermediate metal conduit (IMC)
required to contain a total of ten (10) copper THW conductors in a 20ft run, five
(5) size 1 AWG and five (5) size 3 AWG?
*(Pg. 70-684) - CORRECT ANSWER-2-1/2 Inches
size 1 AWG THW=.1901 sq. in. x 5=.9505 sq. in.
size 3 AWG THW=.1134 SQ. IN. x 5=.537 sq. in.
total=1.5175 sq. in.
*NOTE: A trade size 2-1/2 in. IMC with an allowable 40% fill of 2.054 sq. in. should
be selected.
If more than 2 conductors are used in a tube of EMT conduit, the total interior
area that can be filled is no more than ______ percent.
, *(Pg. 70-680) - CORRECT ANSWER-40%
What is the maximum cross-sectional value that conduit nipples under 24 inches
long may be filled?
*(pg. 70-678) - CORRECT ANSWER-60%
(4) Where conduit or tubing nipples having a maximum length not to exceed 600
mm (24 in.) are installed between boxes, cabinets, and similar enclosures, the
nipples shall be permitted to be filled to 60% of their total cross-sectional area,
and 310.15(B)(3)(a) adjustment factors need not apply to this condition
True or False:
The raceway fill limitations detailed in 300.17 will apply to coaxial cables. -
CORRECT ANSWER-False
The raceway fill requirements of chapters 3 & 9 shall not apply to coaxial cables.
A bonding jumper not smaller than ________ AWG copper or equivalent must be
connected between the radio and TV equipment grounding electrode and the
power grounding electrode system when they are separate. - CORRECT ANSWER-
6 AWG
A bonding jumper not smaller than 6 AWG copper or equivalent shall be
connected between the radio & TV equipment grounding and the power
2025/2026
Where K=12.9, what is the approximate voltage-drop on a circuit where an 80-
ampere, 240-volt, single-phase load is supplied with size 3 AWG copper
conductors with THWN insulation, and placed 200 feet from a panelboard?
*Chapter 9 tables, table 8 conductor properties
(pg. 70-689) - CORRECT ANSWER-7.84 volts
voltage-drop formula
VD=2KID VD=2 x 12.9 x 80amps x 200ft. =7.84
CM 52.620 CM
Given the following information, what is the maximum approximate distance a
single-phase, 240-volt, 42-ampere load can be located from a panelboard?
*copper conductors - K = 12.9
*size 8 AWG THWN/THHN conductors are used
*limit voltage drop to 3%
*Chapter 9 tables, table 8 conductor properties
,(pg. 70-689) - CORRECT ANSWER-50 feet
Distance formula
1st. find allowable VD - 240volts x 3% = 7.2volts
D=CM x VD
D=16,510 x 7.2=118,872=109.7feet
2 x K X I 2 X 12.9 X 42
What is the minimum allowable trade size intermediate metal conduit (IMC)
required to contain a total of ten (10) copper THW conductors in a 20ft run, five
(5) size 1 AWG and five (5) size 3 AWG?
*(Pg. 70-684) - CORRECT ANSWER-2-1/2 Inches
size 1 AWG THW=.1901 sq. in. x 5=.9505 sq. in.
size 3 AWG THW=.1134 SQ. IN. x 5=.537 sq. in.
total=1.5175 sq. in.
*NOTE: A trade size 2-1/2 in. IMC with an allowable 40% fill of 2.054 sq. in. should
be selected.
If more than 2 conductors are used in a tube of EMT conduit, the total interior
area that can be filled is no more than ______ percent.
, *(Pg. 70-680) - CORRECT ANSWER-40%
What is the maximum cross-sectional value that conduit nipples under 24 inches
long may be filled?
*(pg. 70-678) - CORRECT ANSWER-60%
(4) Where conduit or tubing nipples having a maximum length not to exceed 600
mm (24 in.) are installed between boxes, cabinets, and similar enclosures, the
nipples shall be permitted to be filled to 60% of their total cross-sectional area,
and 310.15(B)(3)(a) adjustment factors need not apply to this condition
True or False:
The raceway fill limitations detailed in 300.17 will apply to coaxial cables. -
CORRECT ANSWER-False
The raceway fill requirements of chapters 3 & 9 shall not apply to coaxial cables.
A bonding jumper not smaller than ________ AWG copper or equivalent must be
connected between the radio and TV equipment grounding electrode and the
power grounding electrode system when they are separate. - CORRECT ANSWER-
6 AWG
A bonding jumper not smaller than 6 AWG copper or equivalent shall be
connected between the radio & TV equipment grounding and the power
