(Illustrated Guide to the NEC, 9th Edition – Solution & Answer Table A+: 2026).
Illustrated
Guide to the
NEC, 9th
Edition –
Solution &
Answer
Table
3/23/2026, 4:41:40 PM 3/23/2026, 4:41:35 PM 3/23/2026, 4:41:34 PM
, (Illustrated Guide to the NEC, 9th Edition – Solution & Answer Table A+: 2026).
Ch Q Question Answe Rationale
# r
1— 1 The NEC is primarily B NEC’s scope is safety—minimizing fire
General intended to: and shock risks; not cost or design
specifics.
1 2 Which authority B The AHJ interprets and enforces NEC;
enforces the NEC often local inspectors.
locally?
1 3 Which is not covered A NEC excludes marine, railway, and
by NEC? some communications installations.
1 4 NEC defines a B Someone with skills and safety
“qualified person” as: training to perform electrical tasks.
1 5 Term for circuit from B Branch circuit runs from overcurrent
OCPD to outlets? protection device to outlets.
1 6 Color identifying B NEC requires green or bare copper for
equipment grounding EGC.
conductor?
1 7 “Listed” equipment B Evaluated and approved by
means: recognized independent testing lab
(e.g., UL).
1 8 Purpose of NRTL? B Test and certify products for safety
compliance.
1 9 NEC is revised every: B NEC updates on a 3-year cycle.
1 10 NEC applies to: B Covers safe installation and use of
conductors, equipment, raceways.
| 2 — Wiring & Protection | 1 | Minimum copper size for residential branch circuits? | B | 14
AWG minimum for 15 A circuits. |
| 2 | 2 | Branch circuits supplying kitchen receptacles must: | B | At least two 20 A
small-appliance circuits required. |
| 2 | 3 | Overcurrent protection for continuous loads? | B | NEC requires 125% of load to
prevent overheating. |
| 2 | 4 | Conductors supplying a single motor are protected against? | B | Motor OCPD
protects overload; branch OCPD protects short circuit. |
| 2 | 5 | GFCIs protect against? | B | Protect from ground-fault shock hazards. |
| 2 | 6 | Minimum burial depth under residential driveway? | C | 24 in. required unless using
special wiring methods. |
| 2 | 7 | Conductor ampacity adjustment starts with how many conductors? | B | More than 3
triggers derating per NEC tables. |
| 2 | 8 | Minimum receptacles in 12 ft living room wall? | A | At least one; no point >6 ft from
3/23/2026, 4:41:40 PM 3/23/2026, 4:41:35 PM 3/23/2026, 4:41:34 PM
, (Illustrated Guide to the NEC, 9th Edition – Solution & Answer Table A+: 2026).
outlet. |
| 2 | 9 | AFCIs required in: | A | Dwelling bedrooms; newer codes expand to more areas. |
| 2 | 10 | Max disconnects for one service? | C | “Rule of six” allows up to 6 disconnects. |
| 3 — Wiring Methods & Materials | 1 | Type NM cable permitted in: | B | Dry locations in
dwellings only. |
| 3 | 2 | Minimum bending radius for NM cable? | A | 4× cable diameter to avoid damage. |
| 3 | 3 | MC cable armor may serve as: | A | Equipment grounding conductor if listed. |
| 3 | 4 | Outdoor EMT fittings must be: | B | Listed for wet locations. |
| 3 | 5 | Junction boxes in concealed locations must be: | A | Accessible after building
completion. |
| 3 | 6 | Max conduit fill for >2 conductors? | C | Limited to 40% per NEC. |
| 3 | 7 | Minimum EMT trade size permitted? | B | 1/2 inch minimum. |
| 3 | 8 | AC bonding strip used for: | A | Improved grounding continuity. |
| 4 — Equipment for General Use | 1 | Luminaire clearance in clothes closets? | B | Must
maintain clearance from storage. |
| 4 | 2 | Ceiling-suspended fans must be supported by: | B | Boxes listed for fan support due
to dynamic loads. |
| 4 | 3 | Bathroom receptacles must be: | A | GFCI-protected for shock prevention. |
| 4 | 4 | Track lighting in dwelling closets? | B | Not allowed. |
| 4 | 5 | Receptacle spacing in living rooms? | B | No point >6 ft from a receptacle. |
| 4 | 6 | Appliances requiring dedicated circuits? | D | Microwave >1500 VA, dishwashers,
laundry receptacles all require dedicated circuits. |
| 5 — Special Occupancies | 1 | Hazardous locations classified by: | B | Based on flammable
material and probability of hazard. |
| 5 | 2 | Class I hazardous locations involve: | A | Flammable gases or vapors. |
| 5 | 3 | Wiring methods in Class I, Div 1 must: | B | Prevent ignition (explosionproof
enclosures, seals). |
| 5 | 4 | Class II locations involve: | A | Combustible dusts capable of ignition. |
| 5 | 5 | Agricultural buildings, receptacles in damp/wet areas? | A | Must be GFCI-protected. |
| 5 | 6 | Textile mills with ignitable fibers classification? | C | Class III (fibers/flyings). |
| 5 | 7 | Zone 0 hazardous location means: | A | Continuous presence of ignitable gases. |
| 5 | 8 | Purpose of conduit seal in hazardous location? | B | Prevent flame or explosion
propagation. |
3/23/2026, 4:41:40 PM 3/23/2026, 4:41:35 PM 3/23/2026, 4:41:34 PM
, 3/15/2026 (Solution andSolution and answer
answer guide guide
illustrated illustrated
Solution
guide and
guide
answer
toelectrical
to the national theguide
national
illustrated
code electrical
guide
code
9th edition bytocharles
9th
the edition
nationalbyelectrical
charles r.pdf
code 9th
r - converted_removed edition
A+: 2026).by charles r.pdf
C. Commercial occupancies
D. Industrial occupancies
Answer: A
Rationale: NEC excludes ships, railways, and some communications facilities
under other regulations.
Q4. The NEC defines a “qualified person” as:
A. Anyone with electrical knowledge
B. An individual with skills and safety training to perform electrical tasks
C. A licensed engineer only
D. A certified inspector only
Answer: B
Rationale: A qualified person has demonstrated knowledge and training in
equipment and safety practices.
Q5. Which term means “an electric circuit including conductors between final
overcurrent device and outlet(s)”?
A. Feeder
B. Branch circuit
C. Service conductors
D. Equipment grounding conductor
Answer: B
Rationale: Branch circuit runs from OCPD to outlets. Feeder runs between OCPD
and other OCPD.
Q6. Which color identifies an equipment grounding conductor?
A. White
B. Green or bare
3/23/2026, 4:41:40
Solution and PMguide illustrated guide to the national
answer Solution and3/23/2026,
electrical code
answer
Page 4:41:35
9thguide
2
edition
of 73 PMcharles
illustrated
by guide
r.pdf 3/23/2026,
to the national electrical code 9th edition 4:41:34r.pdf
by charles PM
Illustrated
Guide to the
NEC, 9th
Edition –
Solution &
Answer
Table
3/23/2026, 4:41:40 PM 3/23/2026, 4:41:35 PM 3/23/2026, 4:41:34 PM
, (Illustrated Guide to the NEC, 9th Edition – Solution & Answer Table A+: 2026).
Ch Q Question Answe Rationale
# r
1— 1 The NEC is primarily B NEC’s scope is safety—minimizing fire
General intended to: and shock risks; not cost or design
specifics.
1 2 Which authority B The AHJ interprets and enforces NEC;
enforces the NEC often local inspectors.
locally?
1 3 Which is not covered A NEC excludes marine, railway, and
by NEC? some communications installations.
1 4 NEC defines a B Someone with skills and safety
“qualified person” as: training to perform electrical tasks.
1 5 Term for circuit from B Branch circuit runs from overcurrent
OCPD to outlets? protection device to outlets.
1 6 Color identifying B NEC requires green or bare copper for
equipment grounding EGC.
conductor?
1 7 “Listed” equipment B Evaluated and approved by
means: recognized independent testing lab
(e.g., UL).
1 8 Purpose of NRTL? B Test and certify products for safety
compliance.
1 9 NEC is revised every: B NEC updates on a 3-year cycle.
1 10 NEC applies to: B Covers safe installation and use of
conductors, equipment, raceways.
| 2 — Wiring & Protection | 1 | Minimum copper size for residential branch circuits? | B | 14
AWG minimum for 15 A circuits. |
| 2 | 2 | Branch circuits supplying kitchen receptacles must: | B | At least two 20 A
small-appliance circuits required. |
| 2 | 3 | Overcurrent protection for continuous loads? | B | NEC requires 125% of load to
prevent overheating. |
| 2 | 4 | Conductors supplying a single motor are protected against? | B | Motor OCPD
protects overload; branch OCPD protects short circuit. |
| 2 | 5 | GFCIs protect against? | B | Protect from ground-fault shock hazards. |
| 2 | 6 | Minimum burial depth under residential driveway? | C | 24 in. required unless using
special wiring methods. |
| 2 | 7 | Conductor ampacity adjustment starts with how many conductors? | B | More than 3
triggers derating per NEC tables. |
| 2 | 8 | Minimum receptacles in 12 ft living room wall? | A | At least one; no point >6 ft from
3/23/2026, 4:41:40 PM 3/23/2026, 4:41:35 PM 3/23/2026, 4:41:34 PM
, (Illustrated Guide to the NEC, 9th Edition – Solution & Answer Table A+: 2026).
outlet. |
| 2 | 9 | AFCIs required in: | A | Dwelling bedrooms; newer codes expand to more areas. |
| 2 | 10 | Max disconnects for one service? | C | “Rule of six” allows up to 6 disconnects. |
| 3 — Wiring Methods & Materials | 1 | Type NM cable permitted in: | B | Dry locations in
dwellings only. |
| 3 | 2 | Minimum bending radius for NM cable? | A | 4× cable diameter to avoid damage. |
| 3 | 3 | MC cable armor may serve as: | A | Equipment grounding conductor if listed. |
| 3 | 4 | Outdoor EMT fittings must be: | B | Listed for wet locations. |
| 3 | 5 | Junction boxes in concealed locations must be: | A | Accessible after building
completion. |
| 3 | 6 | Max conduit fill for >2 conductors? | C | Limited to 40% per NEC. |
| 3 | 7 | Minimum EMT trade size permitted? | B | 1/2 inch minimum. |
| 3 | 8 | AC bonding strip used for: | A | Improved grounding continuity. |
| 4 — Equipment for General Use | 1 | Luminaire clearance in clothes closets? | B | Must
maintain clearance from storage. |
| 4 | 2 | Ceiling-suspended fans must be supported by: | B | Boxes listed for fan support due
to dynamic loads. |
| 4 | 3 | Bathroom receptacles must be: | A | GFCI-protected for shock prevention. |
| 4 | 4 | Track lighting in dwelling closets? | B | Not allowed. |
| 4 | 5 | Receptacle spacing in living rooms? | B | No point >6 ft from a receptacle. |
| 4 | 6 | Appliances requiring dedicated circuits? | D | Microwave >1500 VA, dishwashers,
laundry receptacles all require dedicated circuits. |
| 5 — Special Occupancies | 1 | Hazardous locations classified by: | B | Based on flammable
material and probability of hazard. |
| 5 | 2 | Class I hazardous locations involve: | A | Flammable gases or vapors. |
| 5 | 3 | Wiring methods in Class I, Div 1 must: | B | Prevent ignition (explosionproof
enclosures, seals). |
| 5 | 4 | Class II locations involve: | A | Combustible dusts capable of ignition. |
| 5 | 5 | Agricultural buildings, receptacles in damp/wet areas? | A | Must be GFCI-protected. |
| 5 | 6 | Textile mills with ignitable fibers classification? | C | Class III (fibers/flyings). |
| 5 | 7 | Zone 0 hazardous location means: | A | Continuous presence of ignitable gases. |
| 5 | 8 | Purpose of conduit seal in hazardous location? | B | Prevent flame or explosion
propagation. |
3/23/2026, 4:41:40 PM 3/23/2026, 4:41:35 PM 3/23/2026, 4:41:34 PM
, 3/15/2026 (Solution andSolution and answer
answer guide guide
illustrated illustrated
Solution
guide and
guide
answer
toelectrical
to the national theguide
national
illustrated
code electrical
guide
code
9th edition bytocharles
9th
the edition
nationalbyelectrical
charles r.pdf
code 9th
r - converted_removed edition
A+: 2026).by charles r.pdf
C. Commercial occupancies
D. Industrial occupancies
Answer: A
Rationale: NEC excludes ships, railways, and some communications facilities
under other regulations.
Q4. The NEC defines a “qualified person” as:
A. Anyone with electrical knowledge
B. An individual with skills and safety training to perform electrical tasks
C. A licensed engineer only
D. A certified inspector only
Answer: B
Rationale: A qualified person has demonstrated knowledge and training in
equipment and safety practices.
Q5. Which term means “an electric circuit including conductors between final
overcurrent device and outlet(s)”?
A. Feeder
B. Branch circuit
C. Service conductors
D. Equipment grounding conductor
Answer: B
Rationale: Branch circuit runs from OCPD to outlets. Feeder runs between OCPD
and other OCPD.
Q6. Which color identifies an equipment grounding conductor?
A. White
B. Green or bare
3/23/2026, 4:41:40
Solution and PMguide illustrated guide to the national
answer Solution and3/23/2026,
electrical code
answer
Page 4:41:35
9thguide
2
edition
of 73 PMcharles
illustrated
by guide
r.pdf 3/23/2026,
to the national electrical code 9th edition 4:41:34r.pdf
by charles PM
