New Mexico (NM) EL-1J Journeyman Electrical
Distribution Systems, including Transmission
Lines Exam Questions And Correct Answers (Verified
Answers) Plus Explanation 2026 Q&A | Instant
Download Pdf.
question 1
According to NESC, what is the minimum approach distance for qualified workers on
energized 25 kV lines?
A) 2 ft 1 in
B) 2 ft 4 in
C) 2 ft 7 in
D) 3 ft
Answer: C) 2 ft 7 in
*Explanation: NESC Table 410-1 specifies minimum approach distances based on
voltage and required transient overvoltage. For 25 kV phase-to-phase, the listed
distance for qualified workers is 2 ft 7 in. This distance ensures an adequate air gap to
prevent flashover .*
Question 2
What is the primary purpose of grounding in electrical distribution systems?
A) Cost reduction
B) Personnel safety and equipment protection
C) Voltage regulation
D) Power factor improvement
Answer: B) Personnel safety and equipment protection
Explanation: Grounding provides a low-impedance path for fault current, allowing
,protective devices to operate quickly and reducing step and touch potentials. It does not
regulate voltage or improve power factor directly .
Question 3
Under New Mexico Administrative Code, what is the maximum voltage
an EE-98J license holder may work on?
A) 480 V
B) 1,000 V
C) 5,000 V
D) 15,000 V
Answer: C) 5,000 V
*Explanation: The EE-98J classification (residential/light commercial) is limited to systems
not exceeding 5,000 V. The EL-1J (distribution) license allows work on higher voltages,
but the question asks specifically about the EE-98J limit .*
Question 4
NESC Rule 410 covers:
A) Overhead line construction
B) Underground construction
C) General requirements applying to all supply stations
D) Grounding requirements
Answer: C) General requirements applying to all supply stations
Explanation: NESC Rule 410 (Section 41) provides general requirements for supply stations
and substations, including clearances, access, and basic safety provisions .
Question 5
The minimum burial depth for direct-buried cable rated 5 kV to 35 kV in normal soil is:
A) 24 in
B) 30 in
,C) 36 in
D) 42 in
Answer: B) 30 in
*Explanation: NESC Rule 320 and Table 321-1 specify a minimum cover of 30 inches for
cables rated 5 kV to 35 kV in normal soil conditions, unless the cable is installed in
conduit or concrete .*
Question 6
According to NESC, the safety factor for guy wires under heavy loading is:
A) 2.0
B) 2.5
C) 3.0
D) 4.0
Answer: A) 2.0
Explanation: NESC Rule 260 requires a minimum safety factor of 2 for guy wires and other
supporting hardware under heavy loading (extreme wind or ice). For normal grades, a
higher factor may apply .
Question 7
The minimum vertical clearance between 13.8 kV conductors and buildings (over flat
roofs) is:
A) 8 ft
B) 10 ft
C) 12 ft
D) 15 ft
Answer: D) 15 ft
*Explanation: NESC Table 232-1 (Rule 232) requires a minimum clearance of 15 feet for
conductors 8.7 kV to 22 kV above buildings or other structures that are not readily
accessible .*
, Question 8
Which OSHA standard specifically governs safety requirements for electric power
generation, transmission, and distribution work?
A) 1910.1200 (Hazard Communication)
B) 1910.269
C) 1926.1402 (Cranes)
D) 1910.333 (Electrical safe work practices)
Answer: B) 1910.269
Explanation: OSHA 1910.269 is the dedicated standard for power generation, transmission,
and distribution. It covers minimum approach distances, PPE, training, and work practices
for line workers .
Question 9
Under NFPA 70E, what is the primary factor used to determine the required PPE category
for energized work?
A) Voltage level only
B) Arc-flash incident energy at the working distance
C) Type of insulation on conductors
D) Length of the work task
Answer: B) Arc-flash incident energy at the working distance
*Explanation: NFPA 70E requires an arc-flash risk assessment to calculate incident energy
(cal/cm²). The resulting value determines the required PPE category, not voltage alone .*
Question 10
The minimum approach distance (MAD) for a 15 kV uninsulated overhead line under
OSHA 1910.269 is:
A) 10 ft
B) 12 ft
C) 15 ft
D) 18 ft
Answer: B) 12 ft
Explanation: OSHA Table 1-1 (1910.269) specifies a minimum approach distance of 12
Distribution Systems, including Transmission
Lines Exam Questions And Correct Answers (Verified
Answers) Plus Explanation 2026 Q&A | Instant
Download Pdf.
question 1
According to NESC, what is the minimum approach distance for qualified workers on
energized 25 kV lines?
A) 2 ft 1 in
B) 2 ft 4 in
C) 2 ft 7 in
D) 3 ft
Answer: C) 2 ft 7 in
*Explanation: NESC Table 410-1 specifies minimum approach distances based on
voltage and required transient overvoltage. For 25 kV phase-to-phase, the listed
distance for qualified workers is 2 ft 7 in. This distance ensures an adequate air gap to
prevent flashover .*
Question 2
What is the primary purpose of grounding in electrical distribution systems?
A) Cost reduction
B) Personnel safety and equipment protection
C) Voltage regulation
D) Power factor improvement
Answer: B) Personnel safety and equipment protection
Explanation: Grounding provides a low-impedance path for fault current, allowing
,protective devices to operate quickly and reducing step and touch potentials. It does not
regulate voltage or improve power factor directly .
Question 3
Under New Mexico Administrative Code, what is the maximum voltage
an EE-98J license holder may work on?
A) 480 V
B) 1,000 V
C) 5,000 V
D) 15,000 V
Answer: C) 5,000 V
*Explanation: The EE-98J classification (residential/light commercial) is limited to systems
not exceeding 5,000 V. The EL-1J (distribution) license allows work on higher voltages,
but the question asks specifically about the EE-98J limit .*
Question 4
NESC Rule 410 covers:
A) Overhead line construction
B) Underground construction
C) General requirements applying to all supply stations
D) Grounding requirements
Answer: C) General requirements applying to all supply stations
Explanation: NESC Rule 410 (Section 41) provides general requirements for supply stations
and substations, including clearances, access, and basic safety provisions .
Question 5
The minimum burial depth for direct-buried cable rated 5 kV to 35 kV in normal soil is:
A) 24 in
B) 30 in
,C) 36 in
D) 42 in
Answer: B) 30 in
*Explanation: NESC Rule 320 and Table 321-1 specify a minimum cover of 30 inches for
cables rated 5 kV to 35 kV in normal soil conditions, unless the cable is installed in
conduit or concrete .*
Question 6
According to NESC, the safety factor for guy wires under heavy loading is:
A) 2.0
B) 2.5
C) 3.0
D) 4.0
Answer: A) 2.0
Explanation: NESC Rule 260 requires a minimum safety factor of 2 for guy wires and other
supporting hardware under heavy loading (extreme wind or ice). For normal grades, a
higher factor may apply .
Question 7
The minimum vertical clearance between 13.8 kV conductors and buildings (over flat
roofs) is:
A) 8 ft
B) 10 ft
C) 12 ft
D) 15 ft
Answer: D) 15 ft
*Explanation: NESC Table 232-1 (Rule 232) requires a minimum clearance of 15 feet for
conductors 8.7 kV to 22 kV above buildings or other structures that are not readily
accessible .*
, Question 8
Which OSHA standard specifically governs safety requirements for electric power
generation, transmission, and distribution work?
A) 1910.1200 (Hazard Communication)
B) 1910.269
C) 1926.1402 (Cranes)
D) 1910.333 (Electrical safe work practices)
Answer: B) 1910.269
Explanation: OSHA 1910.269 is the dedicated standard for power generation, transmission,
and distribution. It covers minimum approach distances, PPE, training, and work practices
for line workers .
Question 9
Under NFPA 70E, what is the primary factor used to determine the required PPE category
for energized work?
A) Voltage level only
B) Arc-flash incident energy at the working distance
C) Type of insulation on conductors
D) Length of the work task
Answer: B) Arc-flash incident energy at the working distance
*Explanation: NFPA 70E requires an arc-flash risk assessment to calculate incident energy
(cal/cm²). The resulting value determines the required PPE category, not voltage alone .*
Question 10
The minimum approach distance (MAD) for a 15 kV uninsulated overhead line under
OSHA 1910.269 is:
A) 10 ft
B) 12 ft
C) 15 ft
D) 18 ft
Answer: B) 12 ft
Explanation: OSHA Table 1-1 (1910.269) specifies a minimum approach distance of 12
