Article 100-110 Quiz01

This quiz includes 20 questions selected from NEC Articles 100 to 110. The questions are chosen randomly, with no repeats from other quizzes—unless a particular question is used again on purpose because it relates to more than one topic, such as both cable ampacity and cable application.

If you spot any issues or have suggestions, you’re welcome to report questions or review the quiz. Your feedback matters, and contributions to help improve and refine the questions and quizzes are always appreciated.

Lockability must persist, even without the lock present.

1 / 20

What does Article 110.25 require for lockable disconnecting means?

a. They must remain lockable with or without the lock installed.

b. Locks are required only in outdoor installations.

c. They must have integrated padlocks.

d. They must be used only during servicing.

Markings must be clear and long-lasting.

2 / 20

What does Article 110.21(B) specify about field-applied hazard
markings?

a. They must be durable and convey effective warnings.

b. They are optional for small installations.

c. They must be handwritten.

d. Only colors are required for warning labels.

Accurate torque ensures secure and reliable connections.

3 / 20

What does Article 110.14(D) specify about terminal connection torque?

a. Proper tools or devices must be used to achieve indicated torque values.

b. Torque must only be estimated during installation.

c. Connection torque applies only to aluminum conductors.

d. Torque values are optional for small installations.

The NEC allows multiple conductor materials.

4 / 20

What materials are generally permitted for electrical conductors?

a. Silver and copper-clad alloys.

b. Only aluminum.

c. Only copper.

d. Copper, aluminum, or copper-clad aluminum.

Safety depends on preventing accidental contact with live parts.

5 / 20

What does Article 110.27 mandate about guarding live parts?

a. Live parts must always be enclosed.

b. Guarding is optional for low-voltage systems.

c. Live parts must be guarded against accidental contact.

d. Live parts must be elevated above 10 feet.

ESS involves storing and supplying energy.

6 / 20

How is "Energy Storage System (ESS)" defined?

a. A battery backup for critical loads.

b. A capacitor bank for power stability.

c. A power generation system.

d. One or more devices capable of storing energy and providing electrical energy into the premises wiring system or a power network.

Fault current impacts interrupting capability.

7 / 20

What is the purpose of field marking available fault current under
Article 110.24?

a. To warn of high voltage levels.

b. To document overcurrent device settings.

c. To ensure equipment ratings are sufficient for fault conditions.

d. To estimate circuit impedance.

Identification helps avoid confusion during operation.

8 / 20

What does Article 110.22 require for disconnecting means
identification?

a. It must legibly indicate its purpose.

b. It must use engraved plaques.

c. Identification should be visible only during servicing.

d. Identification is only required for industrial settings.

It pertains to dust ingress under certain conditions.

9 / 20

What does "Dusttight" mean?

a. Enclosures constructed to prevent dust entry under specific test conditions.

b. Enclosures that can be cleaned without opening.

c. Enclosures for outdoor use.

d. Enclosures that prevent any dust from entering.

Secure installation ensures stability and safety.

10 / 20

How does Article 110.13 address equipment mounting?

a. Equipment can be mounted on any surface.

b. Temporary mounting is permissible during installation.

c. Wood plugs are allowed for anchoring in concrete.

d. Equipment must be firmly secured.

Environment-specific identification is essential.

11 / 20

What does Article 110.11 specify regarding deteriorating agents?

a. Deteriorating effects are not a concern for electrical equipment.

b. Conductors must withstand all environmental conditions.

c. Equipment must be identified for the operating environment.

d. All equipment must be installed indoors.

Connections depend on the lowest-rated component.

12 / 20

What are the temperature limitations for conductor connections in
Article 110.14?

a. Ratings are not relevant to terminations.

b. Conductors must always operate below 60°C.

c. Conductors are rated only for high-temperature environments.

d. Conductor temperatures must not exceed the lowest-rated component.

Safety and protection are key purposes.

13 / 20

What is an "Enclosure"?

a. A structure enclosing utility systems.

b. The case or housing surrounding equipment to prevent accidental contact with energized parts.

c. A protective layer over conductors.

d. A covering for outdoor electrical installations.

Approval is determined by an overseeing authority

14 / 20

What does "Approved" equipment mean in the context of NEC Article
110?

a. Verified through inspection alone.

b. Manufactured by a licensed supplier.

c. Acceptable to the authority having jurisdiction (AHJ).

d. Certified by any testing laboratory.

Wiring must function as intended without faults.

15 / 20

How does Article 110.7 ensure wiring integrity?

a. Requiring all wiring to be underground.

b. Mandating that wiring be free of short circuits and ground faults.

c. Requiring short circuits for testing purposes.

d. Allowing minor faults in low-voltage circuits.

Focus on energized servicing requirements.

16 / 20

How does Article 110.16 address arc-flash warnings?

a. Labels are optional if maintenance is infrequent.

b. Equipment must have generic warning signs.

c. Warning labels are required for all household appliances.

d. Equipment likely to require energized maintenance must have arc-flash warnings.

Proper use depends on clear guidance.

17 / 20

What must equipment listings include according to Article 110.3(B)?

a. A QR code for product registration.

b. Internet resources for repairs.

c. Installation and usage instructions.

d. Environmental impact information.

They are not required for temporary installations.

18 / 20

What is required for enclosures in damp or wet locations under Article
110.28?

a. They must be waterproof.

b. They must be elevated off the ground.

c. They must meet specific enclosure type ratings.

d. They are not required for temporary installations.

Identification ensures safety in multi-phase systems.

19 / 20

What does Article 110.15 require for high-leg conductors in a 4-wire
delta system?

a. They must be grounded.

b. They must be marked with a yellow stripe.

c. They require no special marking.

d. They must be marked with an orange finish.

The article sets broad standards for electrical installations.

20 / 20

What is covered under Article 110?

a. Provisions for motor control systems.

b. General requirements for installation, use, and access to electrical conductors and equipment.

c. General requirements for overcurrent protection.

d. Requirements for grounding electrodes.

Your score is

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Pos.	Name	Score	Duration
1	jalva292	100 %	12 minutes 12 seconds
2	ericyd	95 %	3 minutes 3 seconds
3	Guest	95 %	4 minutes 15 seconds
4	Guest	95 %	8 minutes 42 seconds
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7	Guest	85 %	13 minutes 7 seconds
8	jalva292	85 %	20 minutes 1 seconds
9	Guest	85 %	1 hours 40 minutes 48 seconds
10	Guest	80 %	4 minutes 46 seconds

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