Journeyman Electrician Exam 2024 (Grade A+)

Journeyman Electrician Exam 2024 (Grade A+) 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) -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) -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) -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) -Answer-40% What is the maximum cross-sectional value that conduit nipples under 24 inches long may be filled? *(pg. 70-678) -Answer-60%