Change Summary: ... the Technical Correlating Committee’s request to the Usability Task Group to investigate key definitions in the NEC as they relate to the Building Construction and Safety Code NFPA 5000, Uniform Fire Code NFPA 1, … Flexible cords and flexible cables, as well as their fittings must be suitable for the use and location. Two different Hazardous Location rating systems are defined by Articles 500 and 505 of the National Electrical Code® . An accommodation with two or more contiguous rooms comprising a compartment, with or without doors between such rooms, that provides living, sleeping, sanitary, and storage facilities. Definitions are also found in XXX.2 sections of other articles. Voltage, Nominal. Disconnecting Means. A protective device for limiting transient voltages by diverting or limiting surge current; it also prevents continued flow of follow current while remaining capable of repeating these functions and is designated as follows: The electronic equipment that performs the telecommunications operations for the transmission of audio, video, and data, and includes power equipment (e.g., dc converters, inverters, and batteries) and technical support equipment (e.g., computers). Below is a preview of the NEC. For further information, see UL 943, Standard for Ground-Fault Circuit Interrupters. Other definitions are included in the article in which they are used but may be referenced in Article 100. A fuse with provision for controlling discharge circuit interruption such that no solid material may be exhausted into the surrounding atmosphere. A qualifying term indicating that the circuit breaker does not have any adjustment to alter the value of current at which it will trip or the time required for its operation. Not readily accessible to persons unless special means for access are used. Bonding Jumper. The NEC Style Manual requires all terms that are used in two or more NEC articles to be defined in Article 100. 90.2 Scope. Switch, Isolating. • See the definition of “Qualified Person” in Article 100. Utility-Interactive Inverter. Part III contains definitions applicable to Hazardous (Classified) Locations. A system intended to provide protection of equipment from damaging line-to-ground fault currents by operating to cause a disconnecting means to open all ungrounded conductors of the faulted circuit. A device that provides a means for connecting communications system(s) grounding conductor(s) and bonding conductor(s) at the service equipment or at the disconnecting means for buildings or structures supplied by a feeder or branch circuit. Electrical Equipment for Use in Hazardous (Classified) Locations. A separate portion of a conduit or tubing system that provides access through a removable cover(s) to the interior of the system at a junction of two or more sections of the system or at a terminal point of the system. only those terms that are used in two or more articles are defined in Article 100. A building or portion of a building in which one or more self-propelled vehicles can be kept for use, sale, storage, rental, repair, exhibition, or demonstration purposes. FPN: Where service equipment is located outside the building walls, there may be no service-entrance conductors or they may be entirely outside the building. Nonvented Power Fuse. • This rule is meant to warn qualified persons who work on energized electrical systems that an arc flash hazard exists so they’ll select proper personal protective equipment (PPE) in accordance with industry accepted safe work practice standards. A device or group of devices that serves to govern, in some predetermined manner, the electric power delivered to the apparatus to which it is connected. Instantaneous Trip (as applied to circuit breakers). FPN: The phrase “authority having jurisdiction,” or its acronym AHJ, is used in NFPA documents in a broad manner, since jurisdictions and approval agencies vary, as do their responsibilities. Where there is no terminal box, meter, or other enclosure, the point of connection is considered to be the point of entrance of the service conductors into the building. A vented fuse unit in which the expulsion effect of gases produced by the arc and lining of the fuseholder, either alone or aided by a spring, extinguishes the arc. Appliance. Limited time offer - Must File by 3/27 100% FREE Fed & State, plus a free … The conductor connected to the neutral point of a system that is intended to carry current under normal conditions. Boxes such as FS and FD or larger cast or sheet metal boxes are not classified as conduit bodies. Concealed. A switch intended for use in general distribution and branch circuits. A cutout in which all or part of the fuse support and its fuse link or disconnecting blade is mounted in oil with complete immersion of the contacts and the fusible portion of the conducting element (fuse link) so that arc interruption by severing of the fuse link or by opening of the contacts will occur under oil. Installations underground or in concrete slabs or masonry in direct contact with the earth; in locations subject to saturation with water or other liquids, such as vehicle washing areas; and in unprotected locations exposed to weather. Surge-Protective Device (SPD). A cooking appliance designed for mounting in or on a counter and consisting of one or more heating elements, internal wiring, and built-in or mountable controls. Ground. Without live parts exposed to a person on the operating side of the equipment. This Code covers the installation and removal of electrical conductors, equipment, and raceways; signaling and communications conductors, equipment, and raceways; and optical fiber cables and raceways for the following: (1) Public and private premises, including buildings, structures, mobile homes, recreational vehicles, and floating buildings
(2) … ft apartment that has the following loads: 1) Dishwasher @ 12.0 amperes, 120 volts. All circuit conductors between the service equipment, the source of a separately derived system, or other power supply source and the final branch-circuit overcurrent device. During the 2020 NEC development process multiple revisions to the NEC were approved to address the aforementioned issues. Study NEC Article 100 Definitions Flashcards Flashcards at ProProfs - This Flashcard quiz is designed to describe the terms and definitions used in the NEC 2008 Article 100. The common point on a wye-connection in a polyphase system or midpoint on a single-phase, 3-wire system, or midpoint of a single-phase portion of a 3-phase delta system, or a midpoint of a 3-wire, direct-current system. A device, group of devices, or other means whereby the conductors of a circuit can be disconnected from their source of supply. Article 400 covers the general requirements, applications, and construction specifications for flexible cords and flexible cables as contained in Table 400.4. Conductor, Bare. Guest Room. FPN: For further information on Type 1, Type 2, Type 3, and Type 4 SPDs, see UL 1449, Standard for Surge Protective Devices. Watertight. Accessible (as applied to wiring methods). Overcurrent. Constructed so that dust will not enter the enclosing case under specified test conditions. Power Fuse Unit. A conductor used to connect the system grounded conductor or the equipment to a grounding electrode or to a point on the grounding electrode system. Locations protected from weather and not subject to saturation with water or other liquids but subject to moderate degrees of moisture. Labeled. Branch Circuit, General-Purpose. 400.3 Suitability. Action requiring personal intervention for its control. Duty, Varying. A building that consists solely of two dwelling units. Constructed so that moisture will not enter the enclosure under specified test conditions. Surge Arrester. Part III of Article 100 contains definitions applicable to Hazardous (Classified) Locations. Rendered inaccessible by the structure or finish of the building. Article 100. Grounding Conductor. One of the key revisions was a definition of “Reconditioned” which is now defined in Article 100 as “Electromechanical systems, equipment, apparatus, or components that are restored to operating conditions. The connection between the grounded circuit conductor and the equipment grounding conductor at the service. Signaling Circuit. Location, Damp. Accessible (as applied to equipment). Branch Circuit. A vented, nonvented, or controlled vented fuse unit in which the arc is extinguished by being drawn through solid material, granular material, or liquid, either alone or aided by a spring. Constructed or protected so that exposure to the weather will not interfere with successful operation. Chapter 5 Special Occupancies. Whereas the preceding definitions are intended to apply wherever the terms are used throughout this Code, the following definitions are applicable only to parts of the article specifically covering installations and equipment operating at over 600 volts, nominal. Part II contains definitions applicable to installations and equipment operating at over 1000 volts, nominal. It is rated in amperes, and it is capable of interrupting its rated current at its rated voltage. A load where the maximum current is expected to continue for 3 hours or more. It is not intended to include commonly defined general terms or commonly defined technical terms from related codes and standards. Type 1: Permanently connected SPDs intended for installation between the secondary of the service transformer and the line side of the service disconnect overcurrent device. For insurance purposes, an insurance inspection department, rating bureau, or other insurance company representative may be the authority having jurisdiction. FPN: Some examples of ways to determine suitability of equipment for a specific purpose, environment, or application include investigations by a qualified testing laboratory (listing and labeling), an inspection agency, or other organizations concerned with product evaluation. Type 3: Point of utilization SPDs. FPN: The means for identifying listed equipment may vary for each organization concerned with product evaluation, some of which do not recognize equipment as listed unless it is also labeled. Duty, Short-Time. Switch, Transfer. Quickly memorize the terms, phrases and much more. Nonautomatic. Dwelling Unit. Electronically actuated fuses may or may not operate in a current-limiting fashion, depending on the type of control selected. The NEC contains Art. A device that establishes a connection between two or more conductors or between one or more conductors and a terminal by means of mechanical pressure and without the use of solder. FPN: Rainproof, raintight, or watertight equipment can fulfill the requirements for weatherproof where varying weather conditions other than wetness, such as snow, ice, dust, or temperature extremes, are not a factor. Capable of being reached quickly for operation, renewal, or inspections without requiring those to whom ready access is requisite to climb over or remove obstacles or to resort to portable ladders, and so forth. The total components and subsystems that, in combination, convert solar energy into electric energy suitable for connection to a utilization load. Electrically connected to, or is, a source of voltage. This makes it clear that other products, like in the image, are considered to be receptacles even if a plug cap is not used. On or attached to the surface or behind panels designed to allow access. Grounding Terms Definitions - NEC Article 100 Again, we will explain more important definitions included in NEC code Article 100 which will be used along this Course, toady we will show the term “Bonding" Definition. A fixed, stationary, or portable selfcontained, electrically illuminated utilization equipment with words or symbols designed to convey information or attract attention. Admitting close approach; not guarded by locked doors, elevation, or other effective means. An inverter intended for use in parallel with an electric utility to supply common loads that may deliver power to the utility. Part II of Article 100 contains definitions applicable to installations and equipment operating at 600 volts. Operation at loads, and for intervals of time, both of which may be subject to wide variation. A non-habitable room or space intended primarily for storage of garments and apparel. FPN No. Device. nec - 100 33. Article 100 Scope. Part I of this article contains definitions intended to apply wherever the terms are used throughout this Code. Vented Power Fuse. The case or housing of apparatus, or the fence or walls surrounding an installation to prevent personnel from accidentally contacting energized parts or to protect the equipment from physical damage. An enclosure for use in underground systems, provided with an open or closed bottom, and sized to allow personnel to reach into, but not enter, for the purpose of installing, operating, or maintaining equipment or wiring or both. Multioutlet Assembly. A type of surface, flush, or freestanding raceway designed to hold conductors and receptacles, assembled in the field or at the factory. The Note has been added to help electricians identify functional differences between Grounded and Grounding Conductors. A switch rated in horsepower that is capable of interrupting the maximum operating overload current of a motor of the same horsepower rating as the switch at the rated voltage. An accommodation combining living, sleeping, sanitary, and storage facilities within a compartment. Duty, Continuous. Enclosure. Listen as Paul Abernathy talks about some of the changes that are taking place to Article 100 (Definitions) in the upcoming 2020 National Electrical Code. Connected to ground without inserting any resistor or impedance device. Duty, Periodic. Automatic. Authority Having Jurisdiction (AHJ). An area with a sink and permanent facilities for food preparation and cooking. Equipment, materials, or services included in a list published by an organization that is acceptable to the authority having jurisdiction and concerned with evaluation of products or services, that maintains periodic inspection of production of listed equipment or materials or periodic evaluation of services, and whose listing states that either the equipment, material, or service meets appropriate designated standards or has been tested and found suitable for a specified purpose. A qualifying term indicating that no delay is purposely introduced in the tripping action of the circuit breaker. Skip To Main Content. A device capable of providing protection for service, feeder, and branch circuits and equipment over the full range of overcurrents between its rated current and its interrupting rating. Multiple Fuse. Electric Power Production and Distribution Network. A system or circuit conductor that is intentionally grounded. Live Parts. Other definitions are included in beginning of each article in which they are used but may also be referenced in Article 100.
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