Article 100

​Recognize Basic NEC Definitions (Article 100)

By Eduardo Fuenmayor

Multiple Choice

What is the purpose of Article 100 from the NEC?

• To specify the roles of electrical inspectors.
• To define terms used in the NEC.
• To provide guidelines for electrical installations.
• To outline the penalties for violations of the NEC.

​Article 100

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​The primary purpose of Article 100 in the National Electrical Code (NEC) is to provide definitions for essential terms used throughout the code. It acts as a reference point for understanding the specific meaning of words and phrases relevant to electrical installations and safety. 

Internet Definitions

​the maximum amount of electrical current, measured in amperes, that a conductor (like a wire or cable) can safely carry continuously under specified conditions without overheating or damaging the conductor or its insulation.

Ampacity

a safety device designed to prevent electrical fires caused by arcing faults. These faults, often resulting from damaged or loose wiring, can generate intense heat and potentially ignite nearby materials.

AFCI

a wire or combination of wires suitable for carrying electric current. This can include bare conductors (without insulation), covered conductors (with non-insulating coverings), and insulated conductors

Conductor

a house, apartment, or other place of residence.

Dwelling

a point on a building's electrical wiring system where electrical current can be taken to power devices

Outlet

unit of an electrical system that, other than a conductor, is intended to carry but not utilize electrical energy, or carries or controls electric energy as its principal function

Device

Multiple Choice

What is a branch circuit?

• A branch circuit is a circuit that supplies power to outlets or devices from the main electrical panel.
• A branch circuit connects directly to the power grid.
• A branch circuit is used only for lighting fixtures.
• A branch circuit is a type of main electrical panel.

Multiple Choice

What is Overcurrent?

• Overcurrent is a type of voltage surge in a circuit.
• Overcurrent is a condition where the current in a circuit exceeds its rated capacity.

Poll

What is a Panelboard?

• A load center, or breaker box, is a component of an electrical system that distributes electricity from a single power source to multiple circuits, providing individual overcurrent protection for each circuit.

• is a more robust and comprehensive system used for controlling, protecting, and isolating electrical equipment, especially in high-power and industrial settings.