Journeyman Electrician Practice Test 2

Question 1: A dwelling service uses 4/0 AWG copper service conductors. The only grounding electrodes are two driven ground rods. What is the largest copper grounding electrode conductor the NEC requires to the rods?

• 8 AWG
• 6 AWG
• 4 AWG
• 2 AWG

NEC Reference: NEC 250.66(A)

Question 2: An 8 AWG copper grounding electrode conductor is run exposed along a basement wall. How must it be protected?

• It must be installed in RMC, IMC, PVC, RTRC, EMT or cable armor
• It only needs green insulation
• No protection is required because it is copper
• It may be stapled to the wall if it is not subject to physical damage

NEC Reference: NEC 250.64(B)

Question 3: A detached garage is supplied by a feeder from the house panel. Which installation is correct at the garage panelboard?

• Omit the grounding electrode because the feeder has an EGC
• Use the neutral as the equipment grounding conductor
• Bond the neutral bar to the enclosure with the main bonding jumper
• Keep the neutral isolated; connect the feeder EGC and the garage grounding electrode conductor to the enclosure

NEC Reference: NEC 250.32(B)(1)

Question 4: An intersystem bonding termination installed at the service must have the capacity for at least how many intersystem bonding conductors?

• Two
• One
• Four
• Three

NEC Reference: NEC 250.94(A)

Question 5: A service has four parallel sets of 600 kcmil copper conductors in one raceway. What is the minimum size copper supply-side bonding jumper for that raceway?

• 3/0 AWG
• 250 kcmil
• 300 kcmil
• 600 kcmil

NEC Reference: NEC Table 250.102(C)(1)

Question 6: A 2,400 sq ft dwelling has the two required small-appliance circuits and one laundry circuit. Using the standard method, what is the demand load for general lighting, small-appliance and laundry loads?

• 4,095 VA
• 4,470 VA
• 6,045 VA
• 11,700 VA

NEC Reference: NEC 220.41, 220.52 and Table 220.45

Question 7: A 4,500-watt, 240-volt, 50-gallon storage water heater is installed. What is the minimum standard overcurrent device rating for its branch circuit?

• 20 A
• 25 A
• 30 A
• 35 A

NEC Reference: NEC 422.13 and 422.10(A)

Question 8: A 480-volt, 3-phase motor draws 25 A per line at a power factor of 0.85. What is the true power?

• 10.2 kW
• 17.7 kW
• 20.8 kW
• 30.6 kW

Question 9: Overhead service conductors passing over a roof that is not otherwise excepted must have a vertical clearance above the roof surface of at least:

• 3 ft
• 8 ft
• 8 ft 6 in.
• 10 ft

NEC Reference: NEC 230.24(A)

Question 10: In a dwelling unit, the receptacle outlets in bathrooms must be supplied by at least one branch circuit rated:

• 20 A, 120 V
• 30 A, 240 V
• Any rating, if GFCI protected
• 15 A, 120 V

NEC Reference: NEC 210.11(C)(3)

Question 11: A feeder supplies a 120 A continuous load and a 45 A noncontinuous load. All terminations are rated 75 °C. What is the minimum size THWN copper feeder conductor?

• 2/0 AWG
• 3/0 AWG
• 4/0 AWG
• 250 kcmil

NEC Reference: NEC 215.2(A)(1)

Question 12: A 480Y/277-volt panelboard faces a concrete block wall (Condition 2). What is the minimum depth of working space in front of the panelboard?

• 5 ft
• 4 ft
• 3½ ft
• 3 ft

NEC Reference: NEC Table 110.26(A)(1)

Question 13: A 40-ampere branch circuit terminates on equipment whose terminals are not marked with a temperature rating. THWN-2 conductors are used. Which column of Table 310.16 governs the conductor ampacity?

• 90 °C
• Whichever column gives the highest ampacity
• 75 °C
• 60 °C

NEC Reference: NEC 110.14(C)(1)(a)

Question 14: As defined in Article 100, equipment that is "within sight from" other equipment must be visible and not more than how far away?

• 25 ft
• 50 ft
• 75 ft
• 100 ft

NEC Reference: NEC Article 100

Question 15: Conductors connected in parallel (1/0 AWG and larger) must be alike in several ways. Which of the following is NOT a requirement?

• All installed in the same raceway
• Same length
• Same insulation type
• Same conductor material

NEC Reference: NEC 310.10(G)

Question 16: Type NM cable run along framing members must be secured at intervals not exceeding 4½ ft and within what distance of every box or cabinet?

• 24 in.
• 18 in.
• 12 in.
• 8 in.

NEC Reference: NEC 334.30

Question 17: Nine current-carrying 10 AWG THHN copper conductors are installed in one raceway at 30 °C ambient. What is the adjusted ampacity of each conductor?

• 24.5 A
• 28 A
• 32 A
• 40 A

NEC Reference: NEC 310.15(C)(1)

Question 18: A 25 ft feeder tap is made from a feeder protected at 400 A. The tap ends in a single circuit breaker. What is the minimum size THWN copper tap conductor (75 °C terminations)?

• 3/0 AWG
• 2/0 AWG
• 1/0 AWG
• 1 AWG

NEC Reference: NEC 240.21(B)(2)

Question 19: In a dwelling unit, overcurrent protective devices (other than supplementary protection) must NOT be located in which room?

• Basement
• Laundry room
• Garage
• Bathroom

NEC Reference: NEC 240.24(E)

Question 20: A motor with a marked service factor of 1.15 has a nameplate full-load current of 22 A. The overload set at 125% trips during starting. What is the maximum overload setting permitted?

• 27.5 A
• 28.6 A
• 30.8 A
• 55 A

NEC Reference: NEC 430.32(C)

Question 21: A feeder supplies three 460-volt, 3-phase induction motors: 10 hp, 15 hp and 25 hp. What is the minimum feeder conductor ampacity?

• 69 A
• 77.5 A
• 86.3 A
• 96 A

NEC Reference: NEC 430.24

Question 22: At a dwelling with a permanently installed swimming pool, at least one 125-volt, 15- or 20-ampere receptacle on a general-purpose branch circuit must be located:

• Not less than 6 ft and not more than 20 ft from the inside wall of the pool
• Not less than 10 ft and not more than 25 ft from the pool
• Within 6 ft of the inside wall of the pool
• Anywhere in the yard, provided it is GFCI protected

NEC Reference: NEC 680.22(A)

Question 23: Within how many seconds after failure of the normal supply must an emergency system have power available?

• 10 seconds
• 30 seconds
• 60 seconds
• 90 seconds

NEC Reference: NEC 700.12

Question 24: At an outdoor motor fuel dispenser, how is the area up to 18 in. above grade within 20 ft horizontally of any edge of the dispenser enclosure classified?

• Class I, Division 2
• Unclassified
• Class I, Division 1
• Class II, Division 2

NEC Reference: NEC Table 514.3(B)(1)

Question 25: Service equipment for a mobile home must be located adjacent to the home, not mounted in or on it, and within sight from and not more than what distance from its exterior wall?

• 15 ft
• 25 ft
• 30 ft
• 50 ft

NEC Reference: NEC 550.32(A)

Question 26: A surface-mounted LED luminaire with a completely enclosed light source is installed on a clothes closet ceiling. What is the minimum clearance between the luminaire and the nearest point of the storage space?

• 18 in.
• 12 in.
• 6 in.
• 3 in.

NEC Reference: NEC 410.16(C)(1)

Question 27: Receptacles must not be installed within a zone measured how far from the top of a bathtub rim or shower stall threshold?

• 5 ft horizontally and 7 ft vertically
• 3 ft horizontally and 6 ft vertically
• 6 ft horizontally and 8 ft vertically
• 3 ft horizontally and 8 ft vertically

NEC Reference: NEC 406.9(C)

Question 28: A metal box contains six 12 AWG current-carrying conductors from cables, two 12 AWG equipment grounding conductors, one duplex receptacle and internal cable clamps. What minimum box volume is required?

• 18.0 cu in.
• 20.25 cu in.
• 22.5 cu in.
• 24.75 cu in.

NEC Reference: NEC 314.16(B)

Question 29: EMT must be securely fastened within what distance of each outlet box, junction box, cabinet or conduit body?

• 5 ft
• 3 ft
• 18 in.
• 12 in.

NEC Reference: NEC 358.30(A)

Question 30: A 75 kVA, 3-phase transformer has a 208Y/120-volt secondary. Secondary overcurrent protection is provided. What is the maximum standard rating for the secondary overcurrent device?

• 225 A
• 250 A
• 300 A
• 400 A

NEC Reference: NEC Table 450.3(B)