LADWP ELECTRICAL CRAFT HELPER
GROUNDING & BONDING EXAM WITH
ACTUAL QUESTIONS AND VERIFIED
ANSWERS, PLUS EXPLAINED
RATIONALES/EXPERT VERIFIED FOR
GUARANTEED 100% PASS 2026/LATEST
UPDATE/INSTANT DOWNLOAD PDF
1. What is the primary safety purpose of bonding normally non-
current-carrying metal parts of electrical equipment?
A. To increase the normal operating voltage of the equipment
B. To provide a low-impedance path for fault current so the protective
device can operate
C. To eliminate the need for overcurrent protection
D. To make the metal equipment enclosure carry normal load current
Answer: B. To provide a low-impedance path for fault current so
the protective device can operate
Rationale: Bonding connects conductive metal parts together and to
the electrical supply system so that a fault can travel through a
sufficiently low-impedance path back toward the source. This allows
the circuit breaker or fuse to operate promptly. Bonding is not
intended to make normally non-current-carrying metal parts part of
the normal load-current circuit. NEC grounding and bonding
requirements specifically emphasize an effective ground-fault current
path capable of carrying the fault current and facilitating operation of
the overcurrent device.
2. Which statement best distinguishes grounding from bonding?
1
,A. Grounding and bonding are exactly the same operation
B. Grounding primarily connects a system or equipment to earth, while
bonding connects conductive parts together to establish electrical
continuity and a fault-current path
C. Bonding connects equipment to earth, while grounding only connects
metal raceways together
D. Grounding is used only on low-voltage circuits, while bonding is
used only on high-voltage circuits
Answer: B. Grounding primarily connects a system or equipment to
earth, while bonding connects conductive parts together to establish
electrical continuity and a fault-current path
Rationale: Grounding and bonding are closely related but perform
different functions. Grounding provides a connection to earth for
purposes such as voltage stabilization and limiting certain imposed
voltages. Bonding creates electrical continuity between conductive
components and establishes an effective path for fault current. A
helper must be able to distinguish these concepts because confusing
them can lead to improperly installed electrical systems.
3. A metal equipment enclosure becomes energized because a phase
conductor has contacted the enclosure. What should an effective
equipment-grounding path accomplish?
A. Increase the enclosure's resistance to ground
B. Direct the fault current through a low-impedance path back toward
the source so the protective device can interrupt the circuit
C. Allow the fault current to remain on the enclosure until someone
touches it
D. Send all fault current through the earth before reaching the source
2
,Answer: B. Direct the fault current through a low-impedance path
back toward the source so the protective device can interrupt the
circuit
Rationale: The equipment-grounding path is designed to provide a
low-impedance metallic return path to the source. The resulting high
fault current should cause the overcurrent protective device to open.
Depending on the earth as the primary fault-return path is not an
acceptable substitute for an effective equipment-grounding path.
4. Which conductor is specifically intended to connect equipment to
the grounding system and carry fault current from equipment back
toward the source?
A. Equipment grounding conductor
B. Ungrounded conductor
C. Grounded conductor only
D. Load-side switching conductor
Answer: A. Equipment grounding conductor
Rationale: An equipment grounding conductor, or EGC, provides a
conductive path for fault current from equipment and other normally
non-current-carrying conductive parts back toward the source. It may
be a wire, metallic raceway, cable armor where permitted, or another
recognized grounding means. Its purpose is different from the
grounding electrode conductor, which connects the system or
equipment to grounding electrodes.
5. Why is the earth generally not considered an effective ground-
fault current path for clearing a typical circuit fault?
A. Earth has no electrical conductivity whatsoever
B. Earth can have too much impedance to reliably carry the magnitude
3
, of fault current needed to operate the overcurrent device
C. Earth always causes a short circuit
D. Earth automatically opens circuit breakers
Answer: B. Earth can have too much impedance to reliably carry
the magnitude of fault current needed to operate the overcurrent
device
Rationale: Soil resistance and impedance can vary substantially and
may be too high to produce sufficient fault current for rapid operation
of a breaker or fuse. A properly installed metallic equipment-
grounding path provides a predictable, low-impedance return path.
NEC grounding and bonding principles expressly identify the earth as
not being an effective ground-fault current path for this purpose.
6. What is the primary function of a grounding electrode conductor?
A. To carry normal branch-circuit load current
B. To connect the electrical system or equipment to a grounding
electrode or grounding electrode system
C. To replace every equipment grounding conductor
D. To serve as the circuit's neutral conductor
Answer: B. To connect the electrical system or equipment to a
grounding electrode or grounding electrode system
Rationale: The grounding electrode conductor, or GEC, connects the
grounded system or equipment to the grounding electrode system. It is
not intended to carry normal load current and is not a substitute for an
equipment grounding conductor. The GEC helps establish the
connection to earth for system grounding and related purposes.
7. Which of the following is an example of a grounding electrode?
4
GROUNDING & BONDING EXAM WITH
ACTUAL QUESTIONS AND VERIFIED
ANSWERS, PLUS EXPLAINED
RATIONALES/EXPERT VERIFIED FOR
GUARANTEED 100% PASS 2026/LATEST
UPDATE/INSTANT DOWNLOAD PDF
1. What is the primary safety purpose of bonding normally non-
current-carrying metal parts of electrical equipment?
A. To increase the normal operating voltage of the equipment
B. To provide a low-impedance path for fault current so the protective
device can operate
C. To eliminate the need for overcurrent protection
D. To make the metal equipment enclosure carry normal load current
Answer: B. To provide a low-impedance path for fault current so
the protective device can operate
Rationale: Bonding connects conductive metal parts together and to
the electrical supply system so that a fault can travel through a
sufficiently low-impedance path back toward the source. This allows
the circuit breaker or fuse to operate promptly. Bonding is not
intended to make normally non-current-carrying metal parts part of
the normal load-current circuit. NEC grounding and bonding
requirements specifically emphasize an effective ground-fault current
path capable of carrying the fault current and facilitating operation of
the overcurrent device.
2. Which statement best distinguishes grounding from bonding?
1
,A. Grounding and bonding are exactly the same operation
B. Grounding primarily connects a system or equipment to earth, while
bonding connects conductive parts together to establish electrical
continuity and a fault-current path
C. Bonding connects equipment to earth, while grounding only connects
metal raceways together
D. Grounding is used only on low-voltage circuits, while bonding is
used only on high-voltage circuits
Answer: B. Grounding primarily connects a system or equipment to
earth, while bonding connects conductive parts together to establish
electrical continuity and a fault-current path
Rationale: Grounding and bonding are closely related but perform
different functions. Grounding provides a connection to earth for
purposes such as voltage stabilization and limiting certain imposed
voltages. Bonding creates electrical continuity between conductive
components and establishes an effective path for fault current. A
helper must be able to distinguish these concepts because confusing
them can lead to improperly installed electrical systems.
3. A metal equipment enclosure becomes energized because a phase
conductor has contacted the enclosure. What should an effective
equipment-grounding path accomplish?
A. Increase the enclosure's resistance to ground
B. Direct the fault current through a low-impedance path back toward
the source so the protective device can interrupt the circuit
C. Allow the fault current to remain on the enclosure until someone
touches it
D. Send all fault current through the earth before reaching the source
2
,Answer: B. Direct the fault current through a low-impedance path
back toward the source so the protective device can interrupt the
circuit
Rationale: The equipment-grounding path is designed to provide a
low-impedance metallic return path to the source. The resulting high
fault current should cause the overcurrent protective device to open.
Depending on the earth as the primary fault-return path is not an
acceptable substitute for an effective equipment-grounding path.
4. Which conductor is specifically intended to connect equipment to
the grounding system and carry fault current from equipment back
toward the source?
A. Equipment grounding conductor
B. Ungrounded conductor
C. Grounded conductor only
D. Load-side switching conductor
Answer: A. Equipment grounding conductor
Rationale: An equipment grounding conductor, or EGC, provides a
conductive path for fault current from equipment and other normally
non-current-carrying conductive parts back toward the source. It may
be a wire, metallic raceway, cable armor where permitted, or another
recognized grounding means. Its purpose is different from the
grounding electrode conductor, which connects the system or
equipment to grounding electrodes.
5. Why is the earth generally not considered an effective ground-
fault current path for clearing a typical circuit fault?
A. Earth has no electrical conductivity whatsoever
B. Earth can have too much impedance to reliably carry the magnitude
3
, of fault current needed to operate the overcurrent device
C. Earth always causes a short circuit
D. Earth automatically opens circuit breakers
Answer: B. Earth can have too much impedance to reliably carry
the magnitude of fault current needed to operate the overcurrent
device
Rationale: Soil resistance and impedance can vary substantially and
may be too high to produce sufficient fault current for rapid operation
of a breaker or fuse. A properly installed metallic equipment-
grounding path provides a predictable, low-impedance return path.
NEC grounding and bonding principles expressly identify the earth as
not being an effective ground-fault current path for this purpose.
6. What is the primary function of a grounding electrode conductor?
A. To carry normal branch-circuit load current
B. To connect the electrical system or equipment to a grounding
electrode or grounding electrode system
C. To replace every equipment grounding conductor
D. To serve as the circuit's neutral conductor
Answer: B. To connect the electrical system or equipment to a
grounding electrode or grounding electrode system
Rationale: The grounding electrode conductor, or GEC, connects the
grounded system or equipment to the grounding electrode system. It is
not intended to carry normal load current and is not a substitute for an
equipment grounding conductor. The GEC helps establish the
connection to earth for system grounding and related purposes.
7. Which of the following is an example of a grounding electrode?
4
