LADWP ELECTRIC METER SETTER EXAM —
CLASS 3822 WITH QUESTIONS AND
VERIFIED ANSWERS, PLUS DETAILED
RATIONALES/EXPERT VERIFIED FOR
GUARANTEED PASS 2026/LATEST
UPDATE/INSTANT DOWNLOAD PDF
1. Single-Phase Metering
A meter setter is preparing to install a single-phase meter in a residential
service. Before inserting the meter into the socket, which condition is
most important to verify?
A. The meter register is set to zero
B. The meter socket is painted the same color as the service equipment
C. The service configuration, socket condition, conductor connections,
and voltage are correct for the meter being installed
D. The customer's previous month's consumption is recorded
Answer: C.
Rationale: The meter must be compatible with the electrical service
and installed into equipment that is mechanically and electrically
suitable. The setter should verify the service configuration, inspect the
socket and connections, and use approved testing procedures before
placing equipment into service. A meter reading or appearance does
not establish that the installation is electrically safe or compatible. The
Class 3822 competency model specifically emphasizes knowledge of
different single-phase meters sufficient to install, remove, replace, and
read them correctly.
2. Electrical Fundamentals — Ohm's Law
1
,A resistive load has a resistance of 24 ohms and is connected across a
120-volt source. Approximately how much current should flow?
A. 0.2 A
B. 5 A
C. 24 A
D. 2,880 A
Answer: B. 5 A.
Rationale: Ohm's law states I = V/R. Therefore, I = 120 V ÷ 24 Ω = 5
A. Understanding the relationship between voltage, current, and
resistance is fundamental to troubleshooting metering circuits and
evaluating whether observed electrical conditions are reasonable. A
meter setter must understand electrical fundamentals rather than
treating metering equipment as an isolated component.
3. Current Transformers
A commercial service uses current transformers because the customer
load is substantially greater than the current rating that can be passed
directly through the meter. What is the principal purpose of the CT?
A. To increase the service voltage
B. To provide a proportional current suitable for metering
C. To convert AC into DC
D. To eliminate the need for voltage connections
Answer: B. To provide a proportional current suitable for metering.
Rationale: A current transformer allows the metering system to
measure large primary currents indirectly by producing a proportional
secondary current. The meter then uses that scaled current, together
with the appropriate voltage information, to calculate energy
consumption. CT installation and wiring are specifically identified as
Class 3822 competency areas.
2
,4. CT Secondary Safety
A meter setter encounters a CT-metering installation and discovers that a
CT secondary circuit may be open while the primary conductor remains
energized. What should be the setter's response?
A. Immediately disconnect the primary conductor by hand
B. Treat the situation as hazardous and follow the applicable approved
procedure for the energized CT circuit
C. Short the secondary with an ordinary piece of wire without
authorization
D. Remove the CT because an open secondary is harmless
Answer: B. Treat the situation as hazardous and follow the
applicable approved procedure for the energized CT circuit.
Rationale: An energized CT with an open secondary can develop
dangerously high secondary voltage. The correct response is to stop,
maintain appropriate boundaries, and follow the established LADWP
operating and safety procedure using properly rated equipment and
authorized methods. Improvised conductors or casual manipulation
can create an arc-flash or shock hazard. The Class 3822 specification
emphasizes hazards associated with energized equipment and proper
safety precautions.
5. Potential Transformers
What is the primary metering function of a potential transformer (PT)?
A. To reduce a higher voltage to a proportional voltage suitable for
metering
B. To increase current to operate large motors
C. To convert AC into mechanical energy
D. To replace overcurrent protection
3
, Answer: A. To reduce a higher voltage to a proportional voltage
suitable for metering.
Rationale: A PT provides an appropriately scaled voltage signal to
metering equipment while maintaining a proportional relationship to
the primary system voltage. This permits measurement of higher-
voltage systems without connecting the meter directly to the full
primary voltage. Proper PT installation and wiring are specifically
included in the Class 3822 competency requirements.
6. Test Switches
What is the principal reason a test switch is incorporated into many
metering installations?
A. To increase customer load
B. To provide a controlled means of isolating or testing metering circuits
C. To replace the service disconnect
D. To regulate customer voltage automatically
Answer: B. To provide a controlled means of isolating or testing
metering circuits.
Rationale: Test switches provide controlled access to metering voltage
and current circuits so that meters can be tested, serviced, or isolated
according to the applicable procedure. They are particularly important
in transformer-rated installations where several circuits must be
handled systematically. The Class 3822 competency model specifically
identifies test switches and test blocks as metering equipment requiring
knowledge and proper installation.
7. Polyphase Metering
4
CLASS 3822 WITH QUESTIONS AND
VERIFIED ANSWERS, PLUS DETAILED
RATIONALES/EXPERT VERIFIED FOR
GUARANTEED PASS 2026/LATEST
UPDATE/INSTANT DOWNLOAD PDF
1. Single-Phase Metering
A meter setter is preparing to install a single-phase meter in a residential
service. Before inserting the meter into the socket, which condition is
most important to verify?
A. The meter register is set to zero
B. The meter socket is painted the same color as the service equipment
C. The service configuration, socket condition, conductor connections,
and voltage are correct for the meter being installed
D. The customer's previous month's consumption is recorded
Answer: C.
Rationale: The meter must be compatible with the electrical service
and installed into equipment that is mechanically and electrically
suitable. The setter should verify the service configuration, inspect the
socket and connections, and use approved testing procedures before
placing equipment into service. A meter reading or appearance does
not establish that the installation is electrically safe or compatible. The
Class 3822 competency model specifically emphasizes knowledge of
different single-phase meters sufficient to install, remove, replace, and
read them correctly.
2. Electrical Fundamentals — Ohm's Law
1
,A resistive load has a resistance of 24 ohms and is connected across a
120-volt source. Approximately how much current should flow?
A. 0.2 A
B. 5 A
C. 24 A
D. 2,880 A
Answer: B. 5 A.
Rationale: Ohm's law states I = V/R. Therefore, I = 120 V ÷ 24 Ω = 5
A. Understanding the relationship between voltage, current, and
resistance is fundamental to troubleshooting metering circuits and
evaluating whether observed electrical conditions are reasonable. A
meter setter must understand electrical fundamentals rather than
treating metering equipment as an isolated component.
3. Current Transformers
A commercial service uses current transformers because the customer
load is substantially greater than the current rating that can be passed
directly through the meter. What is the principal purpose of the CT?
A. To increase the service voltage
B. To provide a proportional current suitable for metering
C. To convert AC into DC
D. To eliminate the need for voltage connections
Answer: B. To provide a proportional current suitable for metering.
Rationale: A current transformer allows the metering system to
measure large primary currents indirectly by producing a proportional
secondary current. The meter then uses that scaled current, together
with the appropriate voltage information, to calculate energy
consumption. CT installation and wiring are specifically identified as
Class 3822 competency areas.
2
,4. CT Secondary Safety
A meter setter encounters a CT-metering installation and discovers that a
CT secondary circuit may be open while the primary conductor remains
energized. What should be the setter's response?
A. Immediately disconnect the primary conductor by hand
B. Treat the situation as hazardous and follow the applicable approved
procedure for the energized CT circuit
C. Short the secondary with an ordinary piece of wire without
authorization
D. Remove the CT because an open secondary is harmless
Answer: B. Treat the situation as hazardous and follow the
applicable approved procedure for the energized CT circuit.
Rationale: An energized CT with an open secondary can develop
dangerously high secondary voltage. The correct response is to stop,
maintain appropriate boundaries, and follow the established LADWP
operating and safety procedure using properly rated equipment and
authorized methods. Improvised conductors or casual manipulation
can create an arc-flash or shock hazard. The Class 3822 specification
emphasizes hazards associated with energized equipment and proper
safety precautions.
5. Potential Transformers
What is the primary metering function of a potential transformer (PT)?
A. To reduce a higher voltage to a proportional voltage suitable for
metering
B. To increase current to operate large motors
C. To convert AC into mechanical energy
D. To replace overcurrent protection
3
, Answer: A. To reduce a higher voltage to a proportional voltage
suitable for metering.
Rationale: A PT provides an appropriately scaled voltage signal to
metering equipment while maintaining a proportional relationship to
the primary system voltage. This permits measurement of higher-
voltage systems without connecting the meter directly to the full
primary voltage. Proper PT installation and wiring are specifically
included in the Class 3822 competency requirements.
6. Test Switches
What is the principal reason a test switch is incorporated into many
metering installations?
A. To increase customer load
B. To provide a controlled means of isolating or testing metering circuits
C. To replace the service disconnect
D. To regulate customer voltage automatically
Answer: B. To provide a controlled means of isolating or testing
metering circuits.
Rationale: Test switches provide controlled access to metering voltage
and current circuits so that meters can be tested, serviced, or isolated
according to the applicable procedure. They are particularly important
in transformer-rated installations where several circuits must be
handled systematically. The Class 3822 competency model specifically
identifies test switches and test blocks as metering equipment requiring
knowledge and proper installation.
7. Polyphase Metering
4
