COMPLETE VERIFIED QUESTIONS AND DETAILED SOLUTIONS | LATEST UPDATE THIS YEAR JUST RELEASED
CITY OF LOS ANGELES
JOURNEY-LEVEL ELECTRICIAN
JLE EXAMINATION
VERIFIED Q&A JLE EXAM DETAILED SOLUTIONS LATEST UPDATE
, EXAM COVERAGE AREAS
JLE: NEC Electrical Theory & Calculations
• Ohm's law power calculations
• NEC articles 210 230 250
• Branch circuits feeders
• Load calculations
JLE: Wiring Methods & Equipment
• Raceways conduit EMT IMC RMC
• Conductors THHN ampacity derating
• Grounding bonding
• Transformers motors
JLE: City of LA Amendments & Safety
• LA Electrical Code amendments
• Safety OSHA lockout tagout
• Blueprints schematics
• Troubleshooting
City LA Journey-Level Electrician JLE Verified Solutions Latest Page 2
, QUESTION 1: NEC Article 210 branch circuit load calculation 120V 20A?
A) Continuous load 80% 20A x120V x0.8=1920VA 16A, noncontinuous 100% 2400VA 20A, Article
210.19 requires 125% continuous
B) No calculation
C) Only 100%
D) Only 80%
CORRECT ANSWER: A) Continuous load 80% 20A x120V x0.8=1920VA 16A,
noncontinuous 100% 2400VA 20A, Article 210.19 requires 125% continuous
RATIONALE: Branch circuits NEC 210: Continuous load runs 3+ hours must be 80% breaker 125%
calculation Article 210.19. 20A 120V =2400VA noncontinuous 100% 1920VA continuous 80% 16A max.
210.52 receptacle spacing 12ft wall 6ft floor. Small appliance 1500VA each. Load calc.
QUESTION 2: Grounding vs bonding NEC Article 250 and transformer?
A) Grounding connects to earth ground rod electrode, bonding connects metal parts to provide fault
path, Article 250.4, transformer delta-wye 208/120 secondary neutral grounded
B) Same
C) Only grounding
D) Only bonding
CORRECT ANSWER: A) Grounding connects to earth ground rod electrode, bonding
connects metal parts to provide fault path, Article 250.4, transformer delta-wye 208/120
secondary neutral grounded
RATIONALE: NEC 250 Grounding Bonding: Grounding connects system to earth electrode ground rod
water pipe, bonding connects metal parts together to provide low impedance fault path clear breaker. Article
250.4 effective ground fault path. Transformer delta primary 480V wye secondary 208Y/120 neutral
grounded X0, turns ratio. Motor FLA Table 430.250.
QUESTION 3: Conduit fill and ampacity derating NEC Chapter 9?
A) Conduit fill Table1 Chapter9 40% over 2 wires, ampacity Table310.16 THHN 90C derating more
than 3 current-carrying conductors 310.15(C) ambient temp
B) No fill
C) Only fill
D) Only ampacity
CORRECT ANSWER: A) Conduit fill Table1 Chapter9 40% over 2 wires, ampacity
Table310.16 THHN 90C derating more than 3 current-carrying conductors 310.15(C)
ambient temp
RATIONALE: Wiring methods: Conduit fill NEC Chapter9 Table1 40% max over 2 wires 31% 2 wires 53% 1
wire Table4 EMT IMC RMC dimensions. Ampacity Table310.16 THHN THWN copper aluminum 90C vs 75C
termination derating adjustment 310.15(C) more than 3 current-carrying conductors 80% 4-6 70% 7-9
correction ambient temp. Voltage drop 3% branch 5% total.
QUESTION 4: NEC Article 210 branch circuit load calculation 120V 20A?
A) Continuous load 80% 20A x120V x0.8=1920VA 16A, noncontinuous 100% 2400VA 20A, Article
210.19 requires 125% continuous
B) No calculation
City LA Journey-Level Electrician JLE Verified Solutions Latest Page 3
, C) Only 100%
D) Only 80%
CORRECT ANSWER: A) Continuous load 80% 20A x120V x0.8=1920VA 16A,
noncontinuous 100% 2400VA 20A, Article 210.19 requires 125% continuous
RATIONALE: Branch circuits NEC 210: Continuous load runs 3+ hours must be 80% breaker 125%
calculation Article 210.19. 20A 120V =2400VA noncontinuous 100% 1920VA continuous 80% 16A max.
210.52 receptacle spacing 12ft wall 6ft floor. Small appliance 1500VA each. Load calc.
QUESTION 5: Grounding vs bonding NEC Article 250 and transformer?
A) Grounding connects to earth ground rod electrode, bonding connects metal parts to provide fault
path, Article 250.4, transformer delta-wye 208/120 secondary neutral grounded
B) Same
C) Only grounding
D) Only bonding
CORRECT ANSWER: A) Grounding connects to earth ground rod electrode, bonding
connects metal parts to provide fault path, Article 250.4, transformer delta-wye 208/120
secondary neutral grounded
RATIONALE: NEC 250 Grounding Bonding: Grounding connects system to earth electrode ground rod
water pipe, bonding connects metal parts together to provide low impedance fault path clear breaker. Article
250.4 effective ground fault path. Transformer delta primary 480V wye secondary 208Y/120 neutral
grounded X0, turns ratio. Motor FLA Table 430.250.
QUESTION 6: Conduit fill and ampacity derating NEC Chapter 9?
A) Conduit fill Table1 Chapter9 40% over 2 wires, ampacity Table310.16 THHN 90C derating more
than 3 current-carrying conductors 310.15(C) ambient temp
B) No fill
C) Only fill
D) Only ampacity
CORRECT ANSWER: A) Conduit fill Table1 Chapter9 40% over 2 wires, ampacity
Table310.16 THHN 90C derating more than 3 current-carrying conductors 310.15(C)
ambient temp
RATIONALE: Wiring methods: Conduit fill NEC Chapter9 Table1 40% max over 2 wires 31% 2 wires 53% 1
wire Table4 EMT IMC RMC dimensions. Ampacity Table310.16 THHN THWN copper aluminum 90C vs 75C
termination derating adjustment 310.15(C) more than 3 current-carrying conductors 80% 4-6 70% 7-9
correction ambient temp. Voltage drop 3% branch 5% total.
QUESTION 7: NEC Article 210 branch circuit load calculation 120V 20A?
A) Continuous load 80% 20A x120V x0.8=1920VA 16A, noncontinuous 100% 2400VA 20A, Article
210.19 requires 125% continuous
B) No calculation
C) Only 100%
D) Only 80%
CORRECT ANSWER: A) Continuous load 80% 20A x120V x0.8=1920VA 16A,
noncontinuous 100% 2400VA 20A, Article 210.19 requires 125% continuous
City LA Journey-Level Electrician JLE Verified Solutions Latest Page 4
CITY OF LOS ANGELES
JOURNEY-LEVEL ELECTRICIAN
JLE EXAMINATION
VERIFIED Q&A JLE EXAM DETAILED SOLUTIONS LATEST UPDATE
, EXAM COVERAGE AREAS
JLE: NEC Electrical Theory & Calculations
• Ohm's law power calculations
• NEC articles 210 230 250
• Branch circuits feeders
• Load calculations
JLE: Wiring Methods & Equipment
• Raceways conduit EMT IMC RMC
• Conductors THHN ampacity derating
• Grounding bonding
• Transformers motors
JLE: City of LA Amendments & Safety
• LA Electrical Code amendments
• Safety OSHA lockout tagout
• Blueprints schematics
• Troubleshooting
City LA Journey-Level Electrician JLE Verified Solutions Latest Page 2
, QUESTION 1: NEC Article 210 branch circuit load calculation 120V 20A?
A) Continuous load 80% 20A x120V x0.8=1920VA 16A, noncontinuous 100% 2400VA 20A, Article
210.19 requires 125% continuous
B) No calculation
C) Only 100%
D) Only 80%
CORRECT ANSWER: A) Continuous load 80% 20A x120V x0.8=1920VA 16A,
noncontinuous 100% 2400VA 20A, Article 210.19 requires 125% continuous
RATIONALE: Branch circuits NEC 210: Continuous load runs 3+ hours must be 80% breaker 125%
calculation Article 210.19. 20A 120V =2400VA noncontinuous 100% 1920VA continuous 80% 16A max.
210.52 receptacle spacing 12ft wall 6ft floor. Small appliance 1500VA each. Load calc.
QUESTION 2: Grounding vs bonding NEC Article 250 and transformer?
A) Grounding connects to earth ground rod electrode, bonding connects metal parts to provide fault
path, Article 250.4, transformer delta-wye 208/120 secondary neutral grounded
B) Same
C) Only grounding
D) Only bonding
CORRECT ANSWER: A) Grounding connects to earth ground rod electrode, bonding
connects metal parts to provide fault path, Article 250.4, transformer delta-wye 208/120
secondary neutral grounded
RATIONALE: NEC 250 Grounding Bonding: Grounding connects system to earth electrode ground rod
water pipe, bonding connects metal parts together to provide low impedance fault path clear breaker. Article
250.4 effective ground fault path. Transformer delta primary 480V wye secondary 208Y/120 neutral
grounded X0, turns ratio. Motor FLA Table 430.250.
QUESTION 3: Conduit fill and ampacity derating NEC Chapter 9?
A) Conduit fill Table1 Chapter9 40% over 2 wires, ampacity Table310.16 THHN 90C derating more
than 3 current-carrying conductors 310.15(C) ambient temp
B) No fill
C) Only fill
D) Only ampacity
CORRECT ANSWER: A) Conduit fill Table1 Chapter9 40% over 2 wires, ampacity
Table310.16 THHN 90C derating more than 3 current-carrying conductors 310.15(C)
ambient temp
RATIONALE: Wiring methods: Conduit fill NEC Chapter9 Table1 40% max over 2 wires 31% 2 wires 53% 1
wire Table4 EMT IMC RMC dimensions. Ampacity Table310.16 THHN THWN copper aluminum 90C vs 75C
termination derating adjustment 310.15(C) more than 3 current-carrying conductors 80% 4-6 70% 7-9
correction ambient temp. Voltage drop 3% branch 5% total.
QUESTION 4: NEC Article 210 branch circuit load calculation 120V 20A?
A) Continuous load 80% 20A x120V x0.8=1920VA 16A, noncontinuous 100% 2400VA 20A, Article
210.19 requires 125% continuous
B) No calculation
City LA Journey-Level Electrician JLE Verified Solutions Latest Page 3
, C) Only 100%
D) Only 80%
CORRECT ANSWER: A) Continuous load 80% 20A x120V x0.8=1920VA 16A,
noncontinuous 100% 2400VA 20A, Article 210.19 requires 125% continuous
RATIONALE: Branch circuits NEC 210: Continuous load runs 3+ hours must be 80% breaker 125%
calculation Article 210.19. 20A 120V =2400VA noncontinuous 100% 1920VA continuous 80% 16A max.
210.52 receptacle spacing 12ft wall 6ft floor. Small appliance 1500VA each. Load calc.
QUESTION 5: Grounding vs bonding NEC Article 250 and transformer?
A) Grounding connects to earth ground rod electrode, bonding connects metal parts to provide fault
path, Article 250.4, transformer delta-wye 208/120 secondary neutral grounded
B) Same
C) Only grounding
D) Only bonding
CORRECT ANSWER: A) Grounding connects to earth ground rod electrode, bonding
connects metal parts to provide fault path, Article 250.4, transformer delta-wye 208/120
secondary neutral grounded
RATIONALE: NEC 250 Grounding Bonding: Grounding connects system to earth electrode ground rod
water pipe, bonding connects metal parts together to provide low impedance fault path clear breaker. Article
250.4 effective ground fault path. Transformer delta primary 480V wye secondary 208Y/120 neutral
grounded X0, turns ratio. Motor FLA Table 430.250.
QUESTION 6: Conduit fill and ampacity derating NEC Chapter 9?
A) Conduit fill Table1 Chapter9 40% over 2 wires, ampacity Table310.16 THHN 90C derating more
than 3 current-carrying conductors 310.15(C) ambient temp
B) No fill
C) Only fill
D) Only ampacity
CORRECT ANSWER: A) Conduit fill Table1 Chapter9 40% over 2 wires, ampacity
Table310.16 THHN 90C derating more than 3 current-carrying conductors 310.15(C)
ambient temp
RATIONALE: Wiring methods: Conduit fill NEC Chapter9 Table1 40% max over 2 wires 31% 2 wires 53% 1
wire Table4 EMT IMC RMC dimensions. Ampacity Table310.16 THHN THWN copper aluminum 90C vs 75C
termination derating adjustment 310.15(C) more than 3 current-carrying conductors 80% 4-6 70% 7-9
correction ambient temp. Voltage drop 3% branch 5% total.
QUESTION 7: NEC Article 210 branch circuit load calculation 120V 20A?
A) Continuous load 80% 20A x120V x0.8=1920VA 16A, noncontinuous 100% 2400VA 20A, Article
210.19 requires 125% continuous
B) No calculation
C) Only 100%
D) Only 80%
CORRECT ANSWER: A) Continuous load 80% 20A x120V x0.8=1920VA 16A,
noncontinuous 100% 2400VA 20A, Article 210.19 requires 125% continuous
City LA Journey-Level Electrician JLE Verified Solutions Latest Page 4
