NASCLA ACCREDITED ELECTRICAL CONTRACTOR
EXAM NEWEST 2026 UPDATE FAST REVIWED FROM
ACTUAL TEST 100 QUESTIONS AND 100% VERIFIED
ANSWERS| A+ GRADE Q&A | INSTANT DOWNLOAD
PDF
1. NEC Code Requirements
Q1 — According to the NEC, a feeder supplying a commercial building must have
overcurrent protection at what point?
A. At the service equipment only
B. At the point closest to the feeder source
C. At any remote panelboard
D. At the largest load branch circuit
Explanation: The NEC requires overcurrent protection to be installed as close as practical to
the feeder source to protect conductors from overloads.
Q2 — What is the maximum allowable voltage drop for branch circuits and feeders
combined in a commercial installation?
A. 2%
B. 5%
C. 10%
D. 12%
Explanation: To maintain efficiency and proper operation of equipment, total voltage drop
should not exceed 5% (3% for individual branch circuits recommended).
2. Business and Project Management
Q3 — When preparing a bid for a project, the electrical contractor should include
allowances for:
A. Only direct labor costs
B. Labor, material, equipment, overhead, and profit
C. Labor and material only
D. Overhead and profit only
,Explanation: A complete bid must cover all costs including labor, materials, equipment,
overhead, and profit to ensure the project is financially viable.
Q4 — What is the primary purpose of a subcontractor pre-qualification questionnaire?
A. To negotiate pricing
B. To advertise services
C. To assess financial stability and experience
D. To decide payment terms
Explanation: Pre-qualification helps the general contractor evaluate a subcontractor’s ability
to complete work based on history, finances, safety, and capability.
3. Estimating and Take-Off
Q5 — In electrical estimating, a “take-off” refers to:
A. The profit margin calculation
B. The process of quantifying material and labor from plans
C. A safety review
D. Final contract negotiation
Explanation: A take-off involves reviewing drawing plans and specs to count and measure all
materials and labor needed.
Q6 — When estimating conduit installation costs, which factor is the most critical to
calculate accurately?
A. Color of conduit
B. Price of paint
C. Length and size of conduit runs
D. Distance to supplier
Explanation: Length and size directly affect material costs and labor time, making them key
components of conduit estimating.
4. Safety and OSHA
Q7 — According to OSHA, what is the minimum requirement for electrical PPE when
working near exposed energized circuits?
A. Hard hat only
,B. Safety glasses only
C. Insulating gloves and arc-rated clothing
D. Steel toe boots only
Explanation: OSHA mandates appropriate PPE including insulating gloves and arc-rated
gear to protect from shock and arc flash hazards.
Q8 — A lockout/tagout procedure is required when:
A. Working outdoors
B. Servicing equipment where unexpected start-up could cause injury
C. Painting electrical panels
D. Installing decorative lighting
Explanation: Lockout/tagout prevents accidental energization during maintenance, protecting
workers from harm.
5. Electrical Theory and Application
Q9 — In a three-phase balanced system, the line current is equal to:
A. Zero
B. The phase current in a wye system
C. Twice the phase current
D. Half the phase current
Explanation: In balanced three-phase wye systems, line current equals phase current,
simplifying calculations.
Q10 — What is the impedance of a circuit with 10 Ω resistance and 24 Ω inductive
reactance?
A. 34 Ω
B. 26 Ω
C. 14 Ω
D. 48 Ω
Explanation: Impedance Z = √(R² + Xₗ²) = √(10² + 24²) = √(100 + 576) = √676 = 26 Ω.
If you want more practice sets by topic (NEC, estimating, safety) or a full-length mock
exam, just ask!
, 11-50
NASCLA Accredited Electrical Contractor Exam —
Practice Questions 11–50 (Answers Highlighted)
11. NEC Code General Requirements
Q11 — What is the minimum NEC grounding electrode conductor size for a 200 A service?
A. 8 AWG copper
B. 6 AWG copper
C. 4 AWG copper
D. 10 AWG copper
Explanation: NEC allows #8 AWG copper grounding electrode conductors for up to 200 A
services unless longer runs or other conditions require upsizing.
Q12 — Which NEC Article covers hazardous (classified) locations?
A. Article 210
B. Article 500
C. Article 300
D. Article 230
Explanation: NEC Article 500 through 516 detail requirements for hazardous locations based
on classification types.
Q13 — In a dwelling unit bathroom, the NEC requires receptacles to be:
A. One within 6 feet of door
B. Across from the sink
C. Within 3 feet of the basin
D. 10 feet from tub
Explanation: Bathroom receptacles must be located within 3 feet of the basin to serve personal
grooming devices safely.
12. Overcurrent Protection
EXAM NEWEST 2026 UPDATE FAST REVIWED FROM
ACTUAL TEST 100 QUESTIONS AND 100% VERIFIED
ANSWERS| A+ GRADE Q&A | INSTANT DOWNLOAD
1. NEC Code Requirements
Q1 — According to the NEC, a feeder supplying a commercial building must have
overcurrent protection at what point?
A. At the service equipment only
B. At the point closest to the feeder source
C. At any remote panelboard
D. At the largest load branch circuit
Explanation: The NEC requires overcurrent protection to be installed as close as practical to
the feeder source to protect conductors from overloads.
Q2 — What is the maximum allowable voltage drop for branch circuits and feeders
combined in a commercial installation?
A. 2%
B. 5%
C. 10%
D. 12%
Explanation: To maintain efficiency and proper operation of equipment, total voltage drop
should not exceed 5% (3% for individual branch circuits recommended).
2. Business and Project Management
Q3 — When preparing a bid for a project, the electrical contractor should include
allowances for:
A. Only direct labor costs
B. Labor, material, equipment, overhead, and profit
C. Labor and material only
D. Overhead and profit only
,Explanation: A complete bid must cover all costs including labor, materials, equipment,
overhead, and profit to ensure the project is financially viable.
Q4 — What is the primary purpose of a subcontractor pre-qualification questionnaire?
A. To negotiate pricing
B. To advertise services
C. To assess financial stability and experience
D. To decide payment terms
Explanation: Pre-qualification helps the general contractor evaluate a subcontractor’s ability
to complete work based on history, finances, safety, and capability.
3. Estimating and Take-Off
Q5 — In electrical estimating, a “take-off” refers to:
A. The profit margin calculation
B. The process of quantifying material and labor from plans
C. A safety review
D. Final contract negotiation
Explanation: A take-off involves reviewing drawing plans and specs to count and measure all
materials and labor needed.
Q6 — When estimating conduit installation costs, which factor is the most critical to
calculate accurately?
A. Color of conduit
B. Price of paint
C. Length and size of conduit runs
D. Distance to supplier
Explanation: Length and size directly affect material costs and labor time, making them key
components of conduit estimating.
4. Safety and OSHA
Q7 — According to OSHA, what is the minimum requirement for electrical PPE when
working near exposed energized circuits?
A. Hard hat only
,B. Safety glasses only
C. Insulating gloves and arc-rated clothing
D. Steel toe boots only
Explanation: OSHA mandates appropriate PPE including insulating gloves and arc-rated
gear to protect from shock and arc flash hazards.
Q8 — A lockout/tagout procedure is required when:
A. Working outdoors
B. Servicing equipment where unexpected start-up could cause injury
C. Painting electrical panels
D. Installing decorative lighting
Explanation: Lockout/tagout prevents accidental energization during maintenance, protecting
workers from harm.
5. Electrical Theory and Application
Q9 — In a three-phase balanced system, the line current is equal to:
A. Zero
B. The phase current in a wye system
C. Twice the phase current
D. Half the phase current
Explanation: In balanced three-phase wye systems, line current equals phase current,
simplifying calculations.
Q10 — What is the impedance of a circuit with 10 Ω resistance and 24 Ω inductive
reactance?
A. 34 Ω
B. 26 Ω
C. 14 Ω
D. 48 Ω
Explanation: Impedance Z = √(R² + Xₗ²) = √(10² + 24²) = √(100 + 576) = √676 = 26 Ω.
If you want more practice sets by topic (NEC, estimating, safety) or a full-length mock
exam, just ask!
, 11-50
NASCLA Accredited Electrical Contractor Exam —
Practice Questions 11–50 (Answers Highlighted)
11. NEC Code General Requirements
Q11 — What is the minimum NEC grounding electrode conductor size for a 200 A service?
A. 8 AWG copper
B. 6 AWG copper
C. 4 AWG copper
D. 10 AWG copper
Explanation: NEC allows #8 AWG copper grounding electrode conductors for up to 200 A
services unless longer runs or other conditions require upsizing.
Q12 — Which NEC Article covers hazardous (classified) locations?
A. Article 210
B. Article 500
C. Article 300
D. Article 230
Explanation: NEC Article 500 through 516 detail requirements for hazardous locations based
on classification types.
Q13 — In a dwelling unit bathroom, the NEC requires receptacles to be:
A. One within 6 feet of door
B. Across from the sink
C. Within 3 feet of the basin
D. 10 feet from tub
Explanation: Bathroom receptacles must be located within 3 feet of the basin to serve personal
grooming devices safely.
12. Overcurrent Protection
