Midterm Review Flashcards
Grounding and bonding is found in which article of the NEC?
A. 300
B. 250
C. 225
D. 350
B. 250
The Earth is a poor conductor therefore offers ______ to current.
A. High impedence
B. Low impedence
C. No opposition
D. No resistance
A. High impedence
When electrical systems are grounded, they are connected to the Earth of either directly or through a conductive body that extends the ______ connection.
A. Bond
B. Neutral
C. Ground
D. Phase
C. Ground
Connected to establish continuity and conductivity defines which of the following?
A. Bonded
B. Grounded
C. Grounding
D. Ungrounded
A. Bonded
Normal current will always return to its source and fault current will always return to ______.
A. A grounding electrode
B. It’s source
C. The Earth
D. The load
B. It’s source
The Earth is not permitted to serve as a(n) ______.
A. Location for grounding electrode
B. Effective ground fault path
C. Path for ground fault current
D. Reference and connection for grounding system
B. Effective ground fault path
The grounding electrode conductor connection for a service must generally be made at a(n) ______ location.
A. Accessible
B. Damp
C. Dry
D. Protected
A. Accessible
Which of the following is a suitable grounding electrode
A. Ground rod
B. Water pipe
C. Ground ring
D. All of the above
D. All of the above
What is the minimum size wire used for a ground ring?
A. 1 AWG
B. 2 AWG
C. 3 AWG
D. 4 AWG
B. 2 AWG
What is the minimum amount of space allowed between ground rods?
A. 3’
B. 6’
C. 9’
D. 12’
B. 6’
A main bonding jumper is required at the first point of service.
True or False
True
Grounding electrode conductors are sized in which table?
A. 250.55
B. 250.66
C. 250.122
D. 250.102(C)(1)
B. 250.66
The size of the largest ungrounded AC service entrance conductor is 500 kcmil, what is the minimum size GEC?
A. 1/0 cu
B. 2/0 cu
C. 3/0 cu
D. 4/0 cu
A. 1/0 cu
Equipment grounding conductors are sized in what table of the NEC?
A. Chapter 9 table 8
B. 240.6(A)
C. 300.5
D. 250.122
D. 250.122
What size equipment grounding conductor is required for a 225A circuit?
A. 6 cu
B. 4 cu
C. 3 cu
D. 2 cu
B. 4 cu
What is the conduit fill percentage for a single GEC?
A. 25%
B. 31%
C. 40%
D. 53%
D. 53%
A non-grounding type receptacle can be replaced with another non-grounding type receptacle.
True or False
True
How is an isolated grounding receptacle identified?
A. Green Triangle
B. Yellow Triangle
C. Orange Triangle
D. Red Triangle
C. Orange Triangle
Where a single 3 wire service is supplied by a grounded system, the grounded neutral conductor performs which of the following functions?
A. Carries line to neutral load
B. Connects to the neutral point of the utility supply system
C. Serves as an effective ground fault current path
D. All of the above
D. All of the above
Where the transfer switch includes switching of the ______ conductor the generator must be grounded as a separately derived system
A. EGC
B. Grounded
C. Bonding Jumper
D. Ungrounded phase wire
B. Grounded
