Two Minute Drill Number 32- Journeyman Improving your skill in code Look Up Increasing Speed Drill...

Two Minute Drill Number 32- Journeyman

Improving your skill in code Look Up Increasing Speed Drill

Copyright 2008 Ted "Smitty" Smith

Directions• Left click on the presentation ICON located at the bottom

of the slide directory to the left of the this slide. • Each slide will transition to the correct answer

automatically in 2:00 minutes. The correct answer will transition in 15 seconds. As you progress through the slide show, the time for each question will be reduced.

• This drill is primarily concerning Journeyman Electrical installations.


• 1. Standard trade size 2-inch rigid polyvinyl chloride conduit (PVC), shall be supported at least every _____.

a. 3 feetb. 5 feetc. 6 feetd. 8 feet Copyright 2008 Ted "Smitty" Smith

• 1. b Tbl. 352.30


• 2. When sizing time-delay Class CC fuses for motor branch-circuit, short-circuit, and ground-fault protection, they are to be sized at the same value as _____.

a. inverse-time circuit breakers

b. Non-time-delay fuses

c. Instantaneous trip circuit breakers

d. Adjustable trip circuit breakersCopyright 2008 Ted "Smitty" Smith

• 2. b Tbl. 430.52,Note 1


• 3. Where sizes 1/0 AWG single conductor cables are installed in ladder type cable tray, the MAXIMUM allowable rung spacing for the ladder cable tray shall be _____.

a. 6 inches

b. 9 inches

c. 12 inches

d. 15 inchesCopyright 2008 Ted "Smitty" Smith

• 3. b 392.3(B)(1)(a)


• 4. The NEC® requires the MAXIMUM length permitted for a flexible cord supplying a 208-volt, single-phase, room air-conditioner to be ____.

a. 4 feet

b. 6 feet

c. 8 feet

d. 10 feet


• 4. b 440.64


• 5. In general, which of the following receptacle outlets in a commercial kitchen are required by the NEC® to be GFCI protected?

a. All 125-volt, single phase, 15- and 20-ampere rated receptacles.

b. All 125-volt, 15- or 20-ampere rated receptacles in wet locations only.

c. All receptacle outlets.

d. All 125-volt countertop receptacle outlets only. Copyright 2008 Ted "Smitty" Smith

• 5. a 210.8(B)(2)


• 6. All wiring installed in or under an aircraft hanger floor shall comply with the requirements for ______ locations.

a. Class I, Division 1

b. Class I, Division 2

c. Class II, Division 1

d. Class II, Division 2


• 6. a 513.8(A)


• 7. In general, branch-circuit conductors supplying more than one motor shall have an ampacity of a at least _____ percent of the FLC of the largest motor, and 100 percent of the FLC of the other motor(s) in the group.

a. 25

b. 80

c. 100

d. 125Copyright 2008 Ted "Smitty" Smith

• 7. d 430.24


• 8. What is the MINIMUM size equipment grounding conductor required for a 5 HP, three-phase, 208-volt motor having 20-ampere rated overload protection and short-circuit overcurrent protection rated at 30 amperes?

a. 10 AWG

b. 14 AWG

c. 12 AWG

d. 8 AWGCopyright 2008 Ted "Smitty" Smith

• 8. a Tbl. 250.122


• 9. If a circuit breaker serves as the controller for a motor, and the motor is not in sight of the breaker, the NEC® requires which of the following?

a. The motor to be less than 2 HP.

b. The breaker be able to be locked in the open position.

c. The motor to be Code letter “E”.

d. The breaker to be rated 25,000 AIC.


• 9. b 430.102(B)(2), Ex.


• 10. In Class II, Division 1, hazardous locations, an approved method of connection of conduit to boxes is _____.

a. Compression fittingsb. Threaded bossesc. Weldingd. All of these


• 10. b502.10(A)(4)


• 11. Given: an AC service is supplied with four parallel kcmil aluminum conductors. What is the MINIMUM size copper grounding electrode required, when connected to the concrete-encased building steel used as the grounding electrode system?

a. 3/0 AWG

b. 4/0 AWG

c. 250 kcmil

d. 2/0 AWGCopyright 2008 Ted "Smitty" Smith

• 11. aTbl. 250.66

500 kcmil X 4 conductors = 2000 kcmil total

*NOTE: Aluminum service-entrance conductors over 1750 kcmil require a size 3/0 AWG copper grounding electrode conductor.


• 12. Given: an AC transformer arc welder has a 50-ampere rated primary current and a 60 percent duty-cycle. Determine the MINIMUM size copper 60°C rated conductors the NEC® requires to supply this welder.

a. 6 AWG

b. 8 AWG

c. 10 AWG


• 12. bTbl. 630.11(A)• Tbl. 310.16• .78 (duty cycle) X 50 amperes (primary

current) = 39 amperes• Tbl. 310.16 requires a size 8 AWG

conductor.


• 13. When installing wiring for sensitive electronic equipment, the MAXIMUM voltage to ground is required to be ____ volts.

a. 30

b. 60

c. 120


• 13. b647.1


• 14. In a health care facility, a patient bed location in a critical care area is required to have which of the following?

a. Four single receptacles or two duplex receptacles

b. Six single receptacles or three duplex receptacles

c. Two duplex receptacles or four single receptacles

d. Two single receptacles or one duplex receptacle


• 14. b517.19(B)(1)&(2)


• 15. Which of the following circuits is prohibited for the grounded conductor to be dependent on receptacle devices for continuity?

a. All circuits

b. Multi-outlet circuits

c. GFCI protected circuits

d. Multi-wire circuits


• 15. d 300.13(B)


• 16. Where conduits enter a floor-standing switchboard or panel-board at the bottom, the conduits including their end fittings, shall not rise more than _____ above the bottom of the enclosure.

a. 6 inches

b. 4 inches

c. 2 inches


• 16. d408.5


• 17. When installed on the service of a building or structure, a type 2 SPD (TVSS) shall be connected _____.

a. On the line side of the service disconnect overcurrent device

b. On the load side of the service disconnect overcurrent device

c. On the meter housing

d. At the final overcurrent deviceCopyright 2008 Ted "Smitty" Smith

• 17.b 285.24(A)


• 18. A detached garage supplied from a dwelling with a three-wire feeder of size 4/0 AWG aluminum USE cable with a 200-ampere rated circuit breaker for overcurrent protection requires a MINIMUM size copper grounding electrode to a concrete encased electrode of _____ AWG.

a. 8

b. 6

c. 4

d. 2 Copyright 2008 Ted "Smitty" Smith

• 18. c250.52(A)(3)


• 19. When a raceway is run from the interior to the exterior of a building, the raceway shall _____.

a. Be rigid metal conduit (RMC)

b. Be rigid polyvinyl chloride conduit (PVC)

c. Be sealed with an approved material

d. Have an explosion-proof sealCopyright 2008 Ted "Smitty" Smith

• 19. c 300.7(A)


• 20. A disconnecting means shall be provided on the supply side of all fuses in circuits having a voltage of at LEAST ______ volts to ground.

a. 120

b. 250

c. 150


• 20. c 240.40


End of Drill• Click the left mouse button

to advance back to the first question. Each question will now be repeated without the timer to give you a chance to review it and find the answer.

• Clicking the left mouse button will advance the slide to the answer and the code

reference.


• 1. Standard trade size 2-inch rigid polyvinyl chloride conduit (PVC), shall be supported at least every _____.

a. 3 feetb. 5 feetc. 6 feetd. 8 feet Copyright 2008 Ted "Smitty" Smith

• 1. b Tbl. 352.30


• 2. When sizing time-delay Class CC fuses for motor branch-circuit, short-circuit, and ground-fault protection, they are to be sized at the same value as _____.

a. inverse-time circuit breakers

b. Non-time-delay fuses

c. Instantaneous trip circuit breakers

d. Adjustable trip circuit breakersCopyright 2008 Ted "Smitty" Smith

• 2. b Tbl. 430.52,Note 1


• 3. Where sizes 1/0 AWG single conductor cables are installed in ladder type cable tray, the MAXIMUM allowable rung spacing for the ladder cable tray shall be _____.

a. 6 inches

b. 9 inches

c. 12 inches


• 3. b 392.3(B)(1)(a)


• 4. The NEC® requires the MAXIMUM length permitted for a flexible cord supplying a 208-volt, single-phase, room air-conditioner to be ____.

a. 4 feet

b. 6 feet

c. 8 feet

d. 10 feet


• 4. b 440.64


• 5. In general, which of the following receptacle outlets in a commercial kitchen are required by the NEC® to be GFCI protected?

a. All 125-volt, single phase, 15- and 20-ampere rated receptacles.

b. All 125-volt, 15- or 20-ampere rated receptacles in wet locations only.

c. All receptacle outlets.

d. All 125-volt countertop receptacle outlets only.


• 5. a 210.8(B)(2)


• 6. All wiring installed in or under an aircraft hanger floor shall comply with the requirements for ______ locations.

a. Class I, Division 1

b. Class I, Division 2

c. Class II, Division 1

d. Class II, Division 2


• 6. a 513.8(A)


• 7. In general, branch-circuit conductors supplying more than one motor shall have an ampacity of a at least _____ percent of the FLC of the largest motor, and 100 percent of the FLC of the other motor(s) in the group.

a. 25

b. 80

c. 100


• 7. d 430.24


• 8. What is the MINIMUM size equipment grounding conductor required for a 5 HP, three-phase, 208-volt motor having 20-ampere rated overload protection and short-circuit overcurrent protection rated at 30 amperes?

a. 10 AWG

b. 14 AWG

c. 12 AWG


• 8. a Tbl. 250.122


• 9. If a circuit breaker serves as the controller for a motor, and the motor is not in sight of the breaker, the NEC® requires which of the following?

a. The motor to be less than 2 HP.

b. The breaker be able to be locked in the open position.

c. The motor to be Code letter “E”.

d. The breaker to be rated 25,000 AIC.


• 9. b 430.102(B)(2), Ex.


• 10. In Class II, Division 1, hazardous locations, an approved method of connection of conduit to boxes is _____.

a. Compression fittingsb. Threaded bossesc. Weldingd. All of these


• 10. b502.10(A)(4)


• 11. Given: an AC service is supplied with four parallel kcmil aluminum conductors. What is the MINIMUM size copper grounding electrode required, when connected to the concrete-encased building steel used as the grounding electrode system?

a. 3/0 AWG

b. 4/0 AWG

c. 250 kcmil

d. 2/0 AWGCopyright 2008 Ted "Smitty" Smith

• 11. aTbl. 250.66

500 kcmil X 4 conductors = 2000 kcmil total

*NOTE: Aluminum service-entrance conductors over 1750 kcmil require a size 3/0 AWG copper grounding electrode conductor.


• 12. Given: an AC transformer arc welder has a 50-ampere rated primary current and a 60 percent duty-cycle. Determine the MINIMUM size copper 60°C rated conductors the NEC® requires to supply this welder.

a. 6 AWG

b. 8 AWG

c. 10 AWG


• 12. bTbl. 630.11(A)• Tbl. 310.16• .78 (duty cycle) X 50 amperes (primary

current) = 39 amperes• Tbl. 310.16 requires a size 8 AWG

conductor.


• 13. When installing wiring for sensitive electronic equipment, the MAXIMUM voltage to ground is required to be ____ volts.

a. 30

b. 60

c. 120


• 13. b647.1


• 14. In a health care facility, a patient bed location in a critical care area is required to have which of the following?

a. Four single receptacles or two duplex receptacles

b. Six single receptacles or three duplex receptacles

c. Two duplex receptacles or four single receptacles

d. Two single receptacles or one duplex receptacle Copyright 2008 Ted "Smitty" Smith

• 14. b517.19(B)(1)&(2)


• 15. Which of the following circuits is prohibited for the grounded conductor to be dependent on receptacle devices for continuity?

a. All circuits

b. Multi-outlet circuits

c. GFCI protected circuits

d. Multi-wire circuits


• 15. d 300.13(B)


• 16. Where conduits enter a floor-standing switchboard or panelboard at the bottom, the conduits including their end fittings, shall not rise more than _____ above the bottom of the enclosure.

a. 6 inches

b. 4 inches

c. 2 inches


• 16. d408.5


• 17. When installed on the service of a building or structure, a type 2 SPD (TVSS) shall be connected _____.

a. On the line side of the service disconnect overcurrent device

b. On the load side of the service disconnect overcurrent device

c. On the meter housing

d. At the final overcurrent deviceCopyright 2008 Ted "Smitty" Smith

• 17.b 285.24(A)


• 18. A detached garage supplied from a dwelling with a three-wire feeder of size 4/0 AWG aluminum USE cable with a 200-ampere rated circuit breaker for overcurrent protection requires a MINIMUM size copper grounding electrode to a concrete encased electrode of _____ AWG.

a. 8

b. 6

c. 4

d. 2 Copyright 2008 Ted "Smitty" Smith

• 18. c250.52(A)(3)


• 19. When a raceway is run from the interior to the exterior of a building, the raceway shall _____.

a. Be rigid metal conduit (RMC)

b. Be rigid polyvinyl chloride conduit (PVC)

c. Be sealed with an approved material

d. Have an explosion-proof sealCopyright 2008 Ted "Smitty" Smith

• 19. c 300.7(A)


• 20. A disconnecting means shall be provided on the supply side of all fuses in circuits having a voltage of at LEAST ______ volts to ground.

a. 120

b. 250

c. 150


• 20. c 240.40


Two Minute Drill Number 32- Journeyman Improving your skill in code Look Up Increasing Speed Drill...

Documents

Transcript of Two Minute Drill Number 32- Journeyman Improving your skill in code Look Up Increasing Speed Drill...