Page 1 of 54
TEST BANK: ILLUSTRATED GUIDE TO THE NEC, 9TH EDITION
160 Integrated Questions with Answers and Rationales
Engineering
PART I: FOUNDATIONAL (CH 1–5) → 40 QUESTIONS
Ch 1: Q1–8 — Intro to NEC
Ch 2: Q9–16 — Definitions
Ch 3: Q17–24 — Boxes & Enclosures
Ch 4: Q25–32 — Cables
Ch 5: Q33–40 — Raceways & Conductors
PART II: ONE-FAMILY DWELLINGS (CH 6–9) → 40 QUESTIONS
Ch 6: Q41–50 — General Provisions
Ch 7: Q51–60 — Specific Provisions
Ch 8: Q61–70 — Load Calculations
Ch 9: Q71–80 — Services & Equipment
PART III: MULTI-FAMILY DWELLINGS (CH 10–11) → 20
QUESTIONS
Ch 10: Q81–90 — Comprehensive Provisions
Ch 11: Q91–100 — Load Calculations
PART IV: COMMERCIAL LOCATIONS (CH 12–14) → 30
QUESTIONS
Ch 12: Q101–110 — General Provisions
Ch 13: Q111–120 — Non-Dwelling Load Calcs
Ch 14: Q121–130 — Services, Feeders & Equipment
, Page 2 of 54
PART V: SPECIAL OCCUPANCIES (CH 15–19) → 30 QUESTIONS
Ch 15: Q131–136 — Hazardous Locations
Ch 16: Q137–142 — Health Care
Ch 17: Q143–148 — Industrial Locations
Ch 18: Q149–154 — Special Occupancies
Ch 19: Q155–160 — Specific Equipment
PART I: FOUNDATIONAL
Ch 1: Intro to NEC
1. What is the primary purpose of the National Electrical
Code (NEC)?
A. To establish design specifications for engineers
B. The practical safeguarding of persons and property from
hazards arising from electricity
C. To provide pricing guidelines for electrical materials
D. To train electricians in safety procedures
Answer: B
Rationale: NEC 90.1(A) states the purpose is the practical
safeguarding of persons and property from hazards arising from
the use of electricity. It is not a design manual or pricing guide.
2. The NEC is published by which organization?
A. OSHA
B. UL
C. NFPA
D. IEEE
Answer: C
Rationale: The NEC is published by the National Fire Protection
, Page 3 of 54
Association (NFPA). OSHA enforces workplace safety, UL tests
products, and IEEE develops standards, but NFPA publishes the
NEC.
3. Which term indicates a mandatory rule in the NEC?
A. May
B. Shall
C. Should
D. Could
Answer: B
Rationale: NEC 90.5(A) states mandatory rules are
characterized by the use of "shall" or "shall not." These are
requirements that must be followed.
4. Which term indicates a permissive rule in the NEC?
A. Shall
B. Must
C. May
D. Will
Answer: C
Rationale: NEC 90.5(B) states permissive rules are
characterized by the use of "may." These are allowed but not
required actions.
5. What is the role of the Authority Having Jurisdiction (AHJ)?
A. To write the NEC
B. To enforce the NEC and approve equipment/installations
C. To manufacture electrical components
D. To train electricians
Answer: B
Rationale: Article 100 defines the AHJ as the organization or
individual responsible for enforcing the Code and approving
, Page 4 of 54
equipment, materials, and installations. The AHJ does not write
the NEC.
6. The NEC is divided into how many chapters?
A. 5
B. 7
C. 9
D. 10
Answer: C
Rationale: The NEC is organized into nine chapters. Chapters 1-
4 apply generally, Chapters 5-7 cover special
occupancies/equipment/conditions, Chapter 8 covers
communications, and Chapter 9 contains tables.
7. Explanatory material in the NEC is found in:
A. Fine print notes
B. Informational Notes
C. Annexes
D. The index
Answer: B
Rationale: NEC 90.5(C) states explanatory material is now in
the form of Informational Notes (formerly fine print notes).
These are not enforceable.
8. The NEC is updated every:
A. Year
B. 2 years
C. 3 years
D. 5 years
Answer: C
Rationale: The NEC is revised and published on a 3-year cycle
TEST BANK: ILLUSTRATED GUIDE TO THE NEC, 9TH EDITION
160 Integrated Questions with Answers and Rationales
Engineering
PART I: FOUNDATIONAL (CH 1–5) → 40 QUESTIONS
Ch 1: Q1–8 — Intro to NEC
Ch 2: Q9–16 — Definitions
Ch 3: Q17–24 — Boxes & Enclosures
Ch 4: Q25–32 — Cables
Ch 5: Q33–40 — Raceways & Conductors
PART II: ONE-FAMILY DWELLINGS (CH 6–9) → 40 QUESTIONS
Ch 6: Q41–50 — General Provisions
Ch 7: Q51–60 — Specific Provisions
Ch 8: Q61–70 — Load Calculations
Ch 9: Q71–80 — Services & Equipment
PART III: MULTI-FAMILY DWELLINGS (CH 10–11) → 20
QUESTIONS
Ch 10: Q81–90 — Comprehensive Provisions
Ch 11: Q91–100 — Load Calculations
PART IV: COMMERCIAL LOCATIONS (CH 12–14) → 30
QUESTIONS
Ch 12: Q101–110 — General Provisions
Ch 13: Q111–120 — Non-Dwelling Load Calcs
Ch 14: Q121–130 — Services, Feeders & Equipment
, Page 2 of 54
PART V: SPECIAL OCCUPANCIES (CH 15–19) → 30 QUESTIONS
Ch 15: Q131–136 — Hazardous Locations
Ch 16: Q137–142 — Health Care
Ch 17: Q143–148 — Industrial Locations
Ch 18: Q149–154 — Special Occupancies
Ch 19: Q155–160 — Specific Equipment
PART I: FOUNDATIONAL
Ch 1: Intro to NEC
1. What is the primary purpose of the National Electrical
Code (NEC)?
A. To establish design specifications for engineers
B. The practical safeguarding of persons and property from
hazards arising from electricity
C. To provide pricing guidelines for electrical materials
D. To train electricians in safety procedures
Answer: B
Rationale: NEC 90.1(A) states the purpose is the practical
safeguarding of persons and property from hazards arising from
the use of electricity. It is not a design manual or pricing guide.
2. The NEC is published by which organization?
A. OSHA
B. UL
C. NFPA
D. IEEE
Answer: C
Rationale: The NEC is published by the National Fire Protection
, Page 3 of 54
Association (NFPA). OSHA enforces workplace safety, UL tests
products, and IEEE develops standards, but NFPA publishes the
NEC.
3. Which term indicates a mandatory rule in the NEC?
A. May
B. Shall
C. Should
D. Could
Answer: B
Rationale: NEC 90.5(A) states mandatory rules are
characterized by the use of "shall" or "shall not." These are
requirements that must be followed.
4. Which term indicates a permissive rule in the NEC?
A. Shall
B. Must
C. May
D. Will
Answer: C
Rationale: NEC 90.5(B) states permissive rules are
characterized by the use of "may." These are allowed but not
required actions.
5. What is the role of the Authority Having Jurisdiction (AHJ)?
A. To write the NEC
B. To enforce the NEC and approve equipment/installations
C. To manufacture electrical components
D. To train electricians
Answer: B
Rationale: Article 100 defines the AHJ as the organization or
individual responsible for enforcing the Code and approving
, Page 4 of 54
equipment, materials, and installations. The AHJ does not write
the NEC.
6. The NEC is divided into how many chapters?
A. 5
B. 7
C. 9
D. 10
Answer: C
Rationale: The NEC is organized into nine chapters. Chapters 1-
4 apply generally, Chapters 5-7 cover special
occupancies/equipment/conditions, Chapter 8 covers
communications, and Chapter 9 contains tables.
7. Explanatory material in the NEC is found in:
A. Fine print notes
B. Informational Notes
C. Annexes
D. The index
Answer: B
Rationale: NEC 90.5(C) states explanatory material is now in
the form of Informational Notes (formerly fine print notes).
These are not enforceable.
8. The NEC is updated every:
A. Year
B. 2 years
C. 3 years
D. 5 years
Answer: C
Rationale: The NEC is revised and published on a 3-year cycle
