SERIES NCCER ELECTRICAL 2 MODULE 9 COMPLETE QUESTIONS AND CORRECT ANSWERS | GRADED AND THE LATEST SERIES

Question: Where a main bonding jumper is required by NEC, the main bonding jumper cannot be less than what percentage Ans: 12.5% Question: A ground test utilizing an auxiliary electrode and an auxiliary potential electrode is known as Ans: 3 point test Question: If single gain nail on non metallic boxes are used with NM cable which of the following is true, plastic box dont have to Ans: Ground it no connection to the box is required Question: The fall of potential method is used to measure what Ans: Earths resistance Question: Rod, pipe, and plate electrodes must have a reistance to ground of at least SERIES Ans: 25ohms Question: In a separately derived system the equipment bonding jumper connects to the Ans: system housing to the Neutral bus bar Question: Which type of system is required to be grounded Ans: AC system over 1kv that supplies mobile or portable equipment Question: The size of an EGC Equipment Grounding Conductor is determined by what Ans: Size of Overcurrent protection device (Breaker) Question: Which of the following is true when installing grounding at more than one building? Ans: The grounded circuit conductor and equipment grounding conductor must both be extended to the second building Question: A transformer supplied system operating at less than 50v must be grounded is the supplied voltage to the transformer exceeds Ans: 150v Question: To be effective, a grounding system must limit the voltage on the electrical system and protect it from SERIES Ans: under voltage conditions Question: A short circuit is a conducting connection between Ans: Any conductors of an electrical system Question: Which of the following is a NEC requirement for grounding and bonding Ans: Continuous system Question: Minimum length for driving ground rods under normal conditions is Ans: 8ft Question: Requirements for grounding services are located in what sections Ans: 250.24 A,B,C, and D Question: System grounding relates to the Ans: Service entrance