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NEC CODE NEC 2023

Commercial load Calculations (NEC Code Questions)

Free NEC Code Questions and Answers ( Commercial Load Calculations)

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Yes — free, no signup required. Each question links to the relevant NEC article so you can study the code directly.

The National Electrical Code (NFPA 70) is the benchmark standard for safe electrical installation in the US. It is updated every 3 years by the NFPA.

Study the edition adopted by your state. As of 2025, most states use the 2020 or 2023 NEC. These tests are written to the 2023 edition.

The most tested articles are 100 (Definitions), 200–250 (Wiring & Grounding), 300–314 (Wiring Methods), 400–411 (Conductors), 430 (Motors), and 700–701 (Emergency Systems).

How to Use This Practice Test

This Commercial load Calculations (NEC Code Questions) has 9 questions with detailed answers and NEC references. Take the full test, review every wrong answer, and look up the NEC article it references before moving on.

Tip: Use the NEC index (back of the book) — find answers by keyword, not by article number.

Topics covered: NEC articles 100, 210, 220, 240, 250, 300, 310, 430, and special occupancies.
Passing score: Aim for 80%+ on NEC code tests before exam day.
Questions: 9 multiple-choice, one correct answer each

9

Questions

14 min

Time

70%

Pass

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Commercial load Calculations (NEC Code Questions) — Question List

Question 1: After the demand factor is applied , what is the general lighting load of a hospital which is having 80,000 sq ft area?

42,000 VA
1,60,000 VA
58,000 VA
82, 000 VA

NEC Reference: NEC 220.12

Question 2: The feeder/service demand load for show window lighting must be …………….. per each linear ft.

200 VA
150 VA
100 VA
250 VA

NEC Reference: NEC 220.14(G)

Question 3: The show window lighting must be treated as ……………….

Continuous load
Non- continuous load

Question 4: In a non dwelling unit the load for general use receptacle is ………….. per yoke

150 VA
180 VA
200 VA
250 VA

NEC Reference: NEC 220.14(G)

Question 5: How many number of receptacle outlets are permitted on a commercial building circuit which is having a computed lighting load of 3400 VA?

20
28
19
16

NEC Reference: NEC 220.14(G)

Question 6: The recreational park is having fifteen 20 A supply facilities, ten 20A and 30 A supply facilities and twenty five 50A supply facilities is operated at 120/240 V single phase. What is the service demand load for the recreational park?

480 A
533 A
686 A
564 A

NEC Reference: NEC 551.73(A)

Question 7: The mobile home park which has 25 site facilities is fed from a 240 V service feeder. What is the demand load for mobile home park?

400 A
450 A
500 A
380 A

NEC Reference: NEC 550.31

Question 8: What is general lighting unit load per square feet for hotels and guest room?

3 VA
2 VA
2 ½ VA
1 VA

NEC Reference: NEC 220.12

Question 9: What is the load of 12000 sq ft warehouse after the demand factors are applied?

3000 VA
2500 VA
2000 VA
2250 VA

NEC Reference: NEC 220.12

Key NEC References for This Test

Article	What It Covers
Ch. 1–4	General rules — apply to all installations
Ch. 5–7	Special rules — override Ch. 1–4 where they conflict
Ch. 8	Communications — completely independent of Ch. 1–7
Ch. 9	Tables — referenced by articles, not standalone enforceable rules
Art. 210.12	AFCI — major expansion in NEC 2026
Art. 230.67	Surge protection at service equipment — new NEC 2026

Study Tip: Learn the NEC index — use keywords, not article numbers. Practice finding 5 different topics in under 2 minutes each.

EXAM CARD NEC CODE

Questions9

Time limit14 min

Pass score70%

Code editionNEC 2023

DifficultyIntermediate

Last reviewedJun 2026

Timer starts immediately. Progress is auto-saved.

Source: NEC 2026 (NFPA 70)