NCCER Electrical Level 2 Module 9 exam 2023 with 100% correct answers

NEC Article 250 ______. - correct answer -is the primary governing article for the proper use and installation of grounding and bounding. Suppose a loose connection has been exposed bare conductor and it contacts the edge of a metal enclosure. Is this an example of a short circuit or a ground fault? - correct answer -ground fault A single-phase system has two legs, Leg A and Leg B. If Leg A is carrying 50A and Leg B is carrying 45A, the current carried by the neutral is _____. - correct answer -50A-45A=5A (Leg A- Leg B) Assuming the use of 75 degrees Celsius copper conductors, a 200A commercial services would require? - correct answer -3/0 service conductors A ground rod must be installed in a coastal location and can only be driven halfway before encountering a rock shelf. One alternative is to _____. - correct answer -burry the rod in a trench at least 30" (750 mm) deep The EGC for a flexible metal conduit connection to a motor supplied with a 20A circuit____. - correct answer -12 AWG copper When using nonmetallic boxes with type NM cable, the grounding wire _____. - correct answer -is not required to be connected to the box When grounding at more than one building, the GEC at the second building is sized using _____. - correct answer -NEC Table 250.66 If the voltage drop between a grounding electrode and an auxiliary potential electrode is 10V and a current of 10A is passed between an auxiliary current electrode and the grounding electrode, the resistance is __. - correct answer -1 ohm