MIKE HOLT UPDATE 2024 COMPREHENSIVE
QUESTIONS AND VERIFIED ANSWERS EXAM TEST
PRACTICE GRADE A+
An equipment bonding jumper can be installed on the outside of a raceway, providing the length of
the equipment bonding jumper is not more than _____ in. and the equipment bonding jumper is
routed with the raceway.
72
Short sections of metal enclosures or raceways used to provide support or protection of _____ from
physical damage shall not be required to be connected to the equipment grounding conductor.
cable assemblies
The intersystem bonding termination shall _____.
all of these
Electrically conductive materials that are likely to _____ in ungrounded systems shall be connected
together and to the supply system grounded equipment in a manner that creates a low-impedance
path for ground-fault current that is capable of carrying the maximum fault current likely to be
imposed on it.
become energized
A service consisting of 12 AWG service-entrance conductors requires a grounding electrode conductor
sized no less than _____ AWG.
8
A grounding electrode shall be required if a building or structure is supplied by a feeder.
True
Metal enclosures shall be permitted to be used to connect bonding jumpers and _____, or both,
together to become a part of an effective ground-fault current path.
equipment grounding conductors.
The grounding electrode conductor shall be permitted to be run to any _____ available in the
grounding electrode system.
convenient grounding electrode
The armor of Type AC cable is recognized by the NEC as an equipment grounding conductor.
True
,A(An) _____ AWG or larger copper or aluminum grounding electrode conductor exposed to physical
damage shall be protected in rigid metal conduit, IMC, Schedule 80 PVC conduit, reinforced
thermosetting resin conduit Type XW (RTRC-XW), EMT, or cable armor.
6
Where a building or structure contains more than one service disconnect in separate enclosures,
grounding electrode conductor connections shall be permitted to be _____.
any of these
In grounded systems, normally noncurrent-carrying electrically conductive materials that are likely to
become energized shall be connected _____ in a manner that establishes an effective ground-fault
current path.
together and to the electrical supply source
Local metal underground systems or structures such as underground tanks are permitted to serve as
grounding electrodes.
True
A buried iron or steel plate used as a grounding electrode shall expose not less than _____ sq ft of
surface area to exterior soil.
2
Listed FMC can be used as the equipment grounding conductor if the conduit does not exceed trade
size _____.
1 1/4
Listed FMC can be used as the equipment grounding conductor if the length in any ground return path
does not exceed 6 ft and the circuit conductors contained in the conduit are protected by overcurrent
devices rated at _____ or less.
20A
What is the minimum size copper supply-side bonding jumper for a service raceway containing 4/0
THHN aluminum conductors?
4 AWG copper
_____ on equipment to be grounded shall be removed from contact surfaces to ensure good electrical
continuity.
any of these
A separate water piping bonding jumper shall be required if the metal frame of a building or structure
is used as the grounding electrode for a separately derived system and is bonded to the metal water
piping in the area served by the separately derived system.
False
, The grounding conductor connection to the grounding electrode shall be made by _____.
any of these
The connection of the system bonding jumper for a separately derived system shall be made _____ on
the separately derived system from the source to the first system disconnecting means or overcurrent
device.
at any single point
Where the resistance-to-ground of 25 ohms or less is not achieved for a single rod electrode, _____.
the single rod electrode shall be supplemented by one additional electrode
An important consideration for limiting imposed voltage on electrical systems is to remember that
bonding and grounding electrode conductors should not be any longer than necessary and
unnecessary bends and loops should be avoided.
True
Listed liquidtight flexible metal conduit (LFMC) is acceptable as an equipment grounding conductor
when it terminates in listed fittings and is protected by an overcurrent device rated 60A or less for
trade sizes 3/8 through 1/2.
False
The common grounding electrode conductor installed for multiple separately derived systems shall be
permitted to be a _____ pipe that complies with 250.68(C)(1).
metal water
A grounded conductor shall not be connected to normally noncurrent-carrying metal parts of
equipment on the _____ side of the system bonding jumper of a separately derived system except as
otherwise permitted in Article 250.
load
Service raceways threaded into metal service equipment such as bosses (hubs) are considered to be
effectively _____ to the service metal enclosure.
bonded
Ungrounded alternating-current systems from 50V to less than 1,000V shall be legibly marked
"Caution: Ungrounded System - Operating _____ Volts Between Conductors" at _____ of the system,
with sufficient durability to withstand the environment involved.
the source or the first disconnecting means
Exposed structural metal interconnected to form a metal building frame that is not intentionally
grounded or bonded and is likely to become energized, shall be bonded to the _____.
any of these
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