NEC Article 100: Mastering Key Electrical Definitions Quiz

In the context of wiring methods, 'accessible' means that the wiring is not permanently closed in by the building or structure, and can be removed or exposed without causing damage to the building structure or finish. It does not refer to being visible, enclosed, or affected by temperature changes.

The correct answer defines 'accessible, readily' as the capability of being reached quickly without any hindrances or barriers in the way.

When something is 'Approved', it means that it is considered acceptable to the authority having jurisdiction, usually the electrical inspector. This indicates that it meets the necessary regulations and standards.

AHJ stands for Authority Having Jurisdiction and refers to the organization, office, or individual responsible for approving equipment, materials, an installation, or a procedure.

In terms of electrical connections, the term 'bonded (bonding)' refers to being connected to establish electrical continuity and conductivity.

Communications equipment refers specifically to electronic telecommunications equipment used for different types of transmissions.

The correct answer defines a device in the context of electrical installations.

Dwelling Units specifically refer to spaces designed for independent living with essential facilities for day-to-day living activities.

A multifamily dwelling refers to a building that has three or more separate living units within it, providing housing for multiple families or individuals. This distinguishes it from single-family homes, duplexes, and even some smaller apartment buildings.

Equipment refers to a broad range of items beyond just machinery, including fittings, devices, appliances, and more.

In mechanical terms, a fitting refers to an accessory designed to perform a specific mechanical function, such as a locknut. It is not related to being unsuitable, promoting a tight-fitting appearance, or formal events.

In this context, 'ground' refers to the earth as in the physical surface of the planet.

Being grounded or grounding means being connected to a conducting body that extends the ground connection. This helps prevent electrical hazards by directing excess current to the ground rather than through a person or equipment.

The grounding conductor is specifically used to connect equipment or the neutral conductor of a wiring system to a grounding electrode for safety purposes.

A grounding electrode is specifically designed to create a direct electrical connection to the earth, enhancing safety in electrical systems by providing a path for excess electrical current to dissipate harmlessly.

Grounding an electrical conductor serves to provide a path for fault currents to flow safely to the earth, reducing the risk of electric shock and protecting equipment from damage.

A Handhole Enclosure is specifically designed for underground systems, not for hand protection, gardening tools, or decorative purposes.

Identified equipment refers to items that are officially recognized as suitable for a specific purpose, function, or environment through approved means like listing or labeling by appropriate authorities.

The correct answer explains that for equipment or materials to be listed, they must be included in a list published by a testing laboratory, meet appropriate standards, and be suitable for a specific purpose.

A plenum is specifically related to HVAC systems and refers to a chamber used for the distribution of air.

A raceway, in terms of electrical wiring, refers to an enclosure used for installing wires, cables, or busbars to protect them and keep them organized. It is not related to racing tracks or other forms of sports competitions.

A remote-control circuit, as defined in Article 725, specifically refers to an electric circuit that controls another circuit using a relay or equivalent device installed according to the standards outlined in the article.

When equipment is described as 'accessible', it means that it allows for close approach without being guarded by locked doors, elevation, or other effective means. This ensures that individuals can easily reach and interact with the equipment as needed.

A bonding jumper is specifically used to ensure electrical conductivity between metal parts of an electrical installation to prevent electrical discharges or shocks.

The correct answer provides a specific definition of a building based on the criteria of firewalls and fire doors, which are essential components of building safety.

Conductors are considered concealed when they are rendered inaccessible by the structure or finish of the building, even if they can still be accessed by withdrawing them. They are not left out in the open or placed in exposed areas, but rather behind walls or enclosed in a raceway for protection.

The term "exposed" in wiring methods refers to being visible or easily accessible on or attached to the surface of a building, or behind panels designed to allow access. It does not refer to being buried, hidden, or loosely placed.

A signaling circuit in the context of Article 725 is specifically designed to energize signaling equipment for purposes such as alarms, security systems, and other similar applications. It is not intended for data transmission, power control, or lighting purposes.

Special permissions often require written consent to ensure accountability and authorization.