NCCER ELECTRICAL MODULE 2 LEVEL 2
PRACTICE STUDY SHEET 2026 QUESTIONS
WITH FULL SOLUTION GRADED A+
◉ When grounding at more than one building, the GEC at the second
building is sized using _____. 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 __. Answer: 1 ohm
◉ When completing a three-point test, the potential electrode is
placed at ____. Answer: 62% of the current electrode distance
◉ Item B in Figure RQ01 represents the _____. Answer: ungrounded
conductors (Hot)
◉ Item E in Figure RQ01 represents the _____. Answer: grounding
electrode conductor
◉ Item C in Figure RQ01 represents the _____. Answer: grounded
conductor (Neutral)
, ◉ Item F in Figure RQ01 represents the _____. Answer: main bonding
jumper
◉ The conducting connection, whether intentional or accidental,
between any of the conductors of an electrical system is known as a
____. Answer: short circuit
◉ Which conductor(S) are grounded on a single-phase, three-wire,
120/240V system? Answer: Neutral
◉ Residential electrical services are grounded by connecting the
grounded conductor to a grounding electrode at the _____. Answer:
neutral bus in the main panelboard
◉ A single-phase system has two legs, Leg A and Leg B. If Leg A is
carrying 35A and Leg B is carrying 30A, the current carried by the
neutral is ____. Answer: 35A-30A=5A (Leg A - Leg B)
◉ A concrete-encased electrode used for service grounding must be
covered with a minimum of ____. Answer: 2" (50 mm) of concrete
◉ Which of the following is an NEC violation when used as a
grounding electrode? Answer: An underground gas line
PRACTICE STUDY SHEET 2026 QUESTIONS
WITH FULL SOLUTION GRADED A+
◉ When grounding at more than one building, the GEC at the second
building is sized using _____. 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 __. Answer: 1 ohm
◉ When completing a three-point test, the potential electrode is
placed at ____. Answer: 62% of the current electrode distance
◉ Item B in Figure RQ01 represents the _____. Answer: ungrounded
conductors (Hot)
◉ Item E in Figure RQ01 represents the _____. Answer: grounding
electrode conductor
◉ Item C in Figure RQ01 represents the _____. Answer: grounded
conductor (Neutral)
, ◉ Item F in Figure RQ01 represents the _____. Answer: main bonding
jumper
◉ The conducting connection, whether intentional or accidental,
between any of the conductors of an electrical system is known as a
____. Answer: short circuit
◉ Which conductor(S) are grounded on a single-phase, three-wire,
120/240V system? Answer: Neutral
◉ Residential electrical services are grounded by connecting the
grounded conductor to a grounding electrode at the _____. Answer:
neutral bus in the main panelboard
◉ A single-phase system has two legs, Leg A and Leg B. If Leg A is
carrying 35A and Leg B is carrying 30A, the current carried by the
neutral is ____. Answer: 35A-30A=5A (Leg A - Leg B)
◉ A concrete-encased electrode used for service grounding must be
covered with a minimum of ____. Answer: 2" (50 mm) of concrete
◉ Which of the following is an NEC violation when used as a
grounding electrode? Answer: An underground gas line
