Residential Electrician Exam #4 Questions And Answers

When a single branch-circuit with an equipment grounding conductor is supplying a detached garage from a house, what, if any, additional grounding electrode(s) is/are required at the garage? a) A ground rod and underground metal water pipe. b) A metal underground water pipe only. c) A metal underground water pipe and building steel, if available. d) No additional electrodes are required. - Answer-D: No additional electrodes are required. Ref: 250.32(A), Ex. The point of attachment of a service drop to a residence where the voltage is 120 volts to ground is required to be at LEAST _____ above grade. a) 8 feet b) 10 feet c) 12 feet d) 15 feet - Answer-B: 10 feet Ref: 230.26 The branch-circuit overcurrent protection device shall be permitted to serve as the disconnecting means for stationary motors rated NOT greater than _____ horsepower. a) 2 b) 1 c) 1⁄ 2 d) 1⁄ 8 - Answer-D: 1⁄ 8 Ref: 430.109(B) When installing an overhead service using a rigid metal conduit (RMC) mast for the support of the service-drop conductors, the mast shall be of adequate strength or be _____ to withstand safely the strain imposed by the service drop. a) at least 2 inches in diameterb) a minimum of 3 inches in diameter c) supported by braces or guys d) less than 4 feet in length - Answer-C: supported by braces or guys Ref: 230.28 When wall switches are installed in the same room with a spa or hot tub, the MINIMUM distance from the switches to the inside wall of the hot tub or spa shall be _____. a) 5 feet b) 10 feet c) 15 feet d) 18 feet - Answer-A: 5 feet Ref: 680.