Journeyman Final Exam Questions with Correct Answers

Journeyman Final Exam Questions with Correct Answers As a general rule, where switches or circuit breakers are used as the main disconnecting means for a building service, they shall be installed such that the center of the grip of the operating handle of the switch or circuit breaker, when in its highest position, is NOT more than ____ above the floor, final grade or working platform. 6 feet 6 feet, 7 inches 6 feet, 6 inches 7 feet - Answer-6 feet, 7 inches 240.24(A) on page 70-103 of the NEC® 2020, 404.8(A) on page 70-264 of the NEC® 2020 When installing a 200-ampere rated temporary service at a construction site and the only grounding electrode available is a driven ground rod, the MINIMUM size grounding electrode conductor to ground the service to the ground rod is _____ copper. 3 AWG 6 AWG 8 AWG 4 AWG - Answer-6 AWG 250.66(A) on page 70-124 of the NEC® 2020 Determine the ampacity of a size 350 kcmil THWN aluminum conductor installed in a raceway with three (3) other current-carrying conductors of the same size where the expected ambient temperature is 44°C. 210 amperes 151 amperes 164 amperes 146 amperes - Answer-164 amperes Table 310.16 on page 70-161 of the NEC® 2020, Table 310.15(B)(1) on page 70-159 of the NEC® 2020, Table 310.15(C)(1) on page 70-160 of the NEC® 2020 Size 350 kcmil THWN AL ampacity before derating = 250 amperes 250 amperes x .82 (temp. correction) x .8 (adjustment factor) = 164 amperes