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Electricity Flashcards: NEC Chapter 4

Electricity Flashcards: NEC Chapter 4

Test your knowledge on the key concepts from NEC Chapter 4 with these flashcards. This quiz will challenge your understanding of the electrical code, capacitor requirements, and conditions for motor installations. Perfect for students or professionals looking to refresh their knowledge.

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Quiz30 Questions
Flashcards29 Cards
Study Notes1 Note
Podcast1 Episode

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Electricity Flashcards: NEC Chapter 4

Quiz • 30 Questions

Electricity Flashcards: NEC Chapter 4 - Flashcards

Flashcards • 29 Cards

Study Notes

3 min • Summary

Electricity Flashcards: NEC Chapter 4 - Podcast

Podcast

Materials

List of Questions30 questions
  1. Question 1
    • 17
  2. Question 2
    • 50V / 1 minute 460.6 (A)
  3. Question 3
    • All motors must be identical
    • A single motor shall not exceed 12 amps
    • Motor loads must be non-continuous
    • Must be protected by overload devices
  4. Question 4
    • 34A
  5. Question 5
    • tend to close the switch with gravity
  6. Question 6
    • cabinet
  7. Question 7
    • Periodic
  8. Question 8
    • 50'
  9. Question 9
    • True
    • False
  10. Question 10
    • True
    • False
  11. Question 11
    • True
    • False
  12. Question 12
    • 120 watts/ft2
  13. Question 13
    • 6A
  14. Question 14
    • 24V
  15. Question 15
    • as a hard usage cord
  16. Question 16
    • True
    • False
  17. Question 17
    • True
    • False
  18. Question 18
    • True
    • False
  19. Question 19
    • True
    • False
  20. Question 20
    • Both
    • Three-phase
    • None
    • Single-phase
  21. Question 21
    • True
    • False
  22. Question 22
    • True
    • False
  23. Question 23
    • True
    • False
  24. Question 24
    • 1000V
  25. Question 25
    • True
    • False
  26. Question 26
    • Continuous loads
  27. Question 27
    • Provision A
    • Provision B
    • Provision C
    • All of the above
  28. Question 28
    • True
    • False
  29. Question 29
    • Kitchen
    • Residential bathroom
    • Conference room of a business office
    • Pool area
  30. Question 30
    • 20A
List of Flashcards29 flashcards
  1. Card 1
    HintSafety requirement after disconnecting power.Memory TipOne minute discharge for capacitor safety.
  2. Card 2
    HintTwo or more 120V, 1-HP or less motors on a 20A circuit.Memory TipA and B conditions must both be met when using multiple motors.
  3. Card 3
    HintThe motor's current under normal operating conditions.Memory Tip25-HP, 480V, 3-Phase equals 34 amps.
  4. Card 4
    HintPrevents accidental circuit energization.Memory TipMount knife switches to prevent gravity closure.
  5. Card 5
    HintProtection from physical damage and electrical hazards.Memory TipPanelboards belong in cabinets.
  6. Card 6
    HintThink of a repetitive on-off cycle.Memory TipPeriodic = recurring load.
  7. Card 7
    HintMaximum separation for clear visibility.Memory Tip50 feet maximum apart to be in sight.
  8. Card 8
    HintExceeding temperature limits for the conductor insulation.Memory Tip75°C insulation on 100-amp isn't permitted.
  9. Card 9
    HintCord length for a waste disposal unit.Memory TipDisposer Cord limit: only 3-feet long.
  10. Card 10
    HintConsider luminaire weight and size.Memory Tip12 inch 6-lb OK screwshell for luminaire support.
  11. Card 11
    HintMaximum heat intensity for embedded units.Memory Tip120 watts max for deicing.
  12. Card 12
    HintCurrent carrying capacity of a small gauge wire.Memory Tip18 AWG wire = 6 amps.
  13. Card 13
    HintTotal voltage calculation based on cell count.Memory Tip12 cells at 2V = 24V.
  14. Card 14
    HintRelates to the cord's durability and application.Memory TipSJ is for 'Severe Job'.
  15. Card 15
    HintOvercurrent protection requirements based on voltage.Memory TipNo overcurrent protection needed with <1000V
  16. Card 16
    HintCapacity of a branch circuit for heating appliances.Memory TipTwo units can be supplied by one 30A.
  17. Card 17
    HintDedicated disconnect required for safety.Memory TipPlug it in but don't rely on the plug to turn it off
  18. Card 18
    HintAlerting personnel to potential hazards.Memory TipCaution signs for heated pipes.
  19. Card 19
    HintDifferent methods for converting electrical phases.Memory TipB and C phase converters are covered in the NEC.
  20. Card 20
    HintCorrect wiring prevents shock hazards.Memory TipBad to switch the grounded wire.
  21. Card 21
    HintIdentifying the higher voltage in delta systems.Memory TipMark the high leg.
  22. Card 22
    HintListing, flame-retardant, voltage rating.Memory TipMust follow: Listed, Resistant, Voltage
  23. Card 23
    HintThreshold for elevated safety precautionsMemory TipOver 1,000: High Voltage.
  24. Card 24
    HintProper cable management.Memory TipDon't run wires through ceilings.
  25. Card 25
    HintImplications for circuit sizing and protection.Memory TipEquipment is considered a continuous load.
  26. Card 26
    HintSafety protocols for emergency situations.Memory TipFollows specified shutdown procedures.
  27. Card 27
    HintMaintaining adequate space for wiring.Memory TipAvoid overcrowding control panels.
  28. Card 28
    HintProtecting children in specific environments.Memory TipConference rooms don't need TR.
  29. Card 29
    HintMaximum current for safety.Memory TipMax 20 amps for low-voltage lighting.

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