Deck 3: Grounding Electrode System and Grounding Electrode Conductor

Question 1

The supplemental electrode is permitted to be connected to the electrical system at several locations, with the exception of the ____.

A) grounding electrode conductor
B) grounded service-entrance conductor
C) water pipe
D) nonflexible grounded service raceway

Answer 1

C

Question 2

Bare aluminum or copper-clad aluminum grounding electrode conductors are permitted to be installed where in direct contact with masonry.

Answer 2

False

Question 3

If a single rod, pipe, or plate grounding electrode has a resistance to earth of ____ or less, the supplemental electrode shall not be required.

A) 25 ohms
B) 50 ohms
C) 75 ohms
D) 100 ohms

Answer 3

A

Question 4

For large services, busbar may be used from the ____________________ to service equipment.

Question 5

____ copper is the largest grounding electrode conductor that is required to be installed where the conductor connects directly to the rod, pipe, or plate grounding electrode.

A) AWG3
B) AWG6
C) AWG9
D) AWG12

Question 6

If piping is underground, metal, and used for water, regardless of the type of water and whether for domestic use or irrigation, drainage, or fire protection purposes, it must be used as a(n) ____________________ if it is in contact with the earth for ten feet or more.

Question 7

With bonding conductor connections to electrodes, connections depending on solder are permitted.

Question 8

There is no maximum or minimum size of water pipe to determine whether the metal water pipe is required to be used as a grounding electrode.The ____ of underground metal water pipe in contact with the earth is the qualifying condition.

A) width
B) length
C) diameter
D) circumference

Question 9

Where ____ or more grounding electrodes are bonded together, a grounding electrode system is established.

A) two
B) three
C) five
D) six

Question 10

Concrete-encased electrodes of existing buildings or structures are not required to be part of the grounding electrode system if the steel reinforcing bars or rods are not accessible for use without disturbing the concrete.