Term
| Ampacity The Current, in amperes, that a conductor can carry continuously under the conditions of use without exceeding its temperatur rating |
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Definition
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Term
| Utilization equipment generally other than industrial, that is normally built in standardized sizes or types and is installed or connected at a unit to perform one or more functions such as clothes wasing air conditiong food mixing deep frying and so forth |
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Definition
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Term
| A branch circuit that supplies energy to one or more outlets to which appliances are to be connected and that has no permanently connected luminaires that are not a part of an appliance |
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Definition
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Term
| Acceptable to the Authority having jurisdiction |
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Definition
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Term
| An organization office or individual responsible for engorcing the requirements of a code or standard or for approving equipment materials an installation or a procedure |
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Definition
| Authority Having Jurisdiction |
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Term
| Connected to establish electrical continuity and conductivity |
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Definition
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Term
| The connection between two or more portions of the equipment grounding conductor |
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Definition
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Term
| The connection between the grounded circuit conductor and the equipment grounding conductor |
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Definition
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Term
| The circuit conductors between the final overcurrent device protecting the circuit and the outlet(s) |
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Definition
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Term
| A structure that stands alone or that is cut off from adjoining structures by fire walls with all openings therin protected by approved fire doors |
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Definition
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Term
| An enclosure that is designed for either surface mounting or flush mounting and is proveded with a frame mat or trim in which a swinging door or doors are or can be hung |
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Definition
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Term
| A device designed to open and close a circuit by nonautomatic means and to open the circuit automatically on a predetermined overcurrent without damage to itself whan properly applied within its rating |
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Definition
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Term
| Rendered inaccessible by the structure or finish of the building. Wires in concealed raceways are considered concealed even though they may become accessible by withdrawing them |
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Definition
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Term
| Operation at a substantially constant load for an indefinitely long time |
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Definition
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Term
| A load where the maximum current is expected to continue for 3 hours or more |
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Definition
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Term
| 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 |
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Definition
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Term
| A conductor encased withing material of composition or thickness that is not recognized by this code as electrical insulation |
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Definition
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Term
| An enclosure designed for surface mounting that has swinging doors or covers secured directly to and telescoping with the walls of the box proper |
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Definition
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Term
| Locations protected from weather and not subject to saturation with water or other liquids but subject to moderate degrees of moisture. Example of such locations include partially protected locations under canopies marquees roofed open porches and like locations and intterior locations subject to moderate degrees of moisture such as some basements some barns and some cold storage warehouses |
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Definition
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Term
| Without live parts exposed to a person on the operating side of the equipment |
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Definition
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Term
| A unit of an electrical system that carries or controls electric energy as its principal function |
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Definition
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Term
| A device or group of devices or other means by which the conductors of a circuit can be disconnected from their source of supply |
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Definition
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Term
| A location not normally subject to dampness or wetness. A location classified as dry may be temporarily subject to dampness or wetness, as in the case of a building under construction |
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Definition
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Term
| Constructed so that dust will not enter the enclosing case under specified test conditions |
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Definition
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Term
| A single unit, providing complete and independent living facilities for one or more persons, including permanent provisions for living, sleeping cooking and sanitation |
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Definition
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Term
| Surrounded by a case housing fence or walls that prevents persons from accidentally contaction energized parts |
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Definition
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Term
| The case or housing of apparatus or the fence or walls surround an installation to prevent personnel from accidentally contacting energized parts or to protect the equipment from physical damage |
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Definition
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Term
| Electrically connected to or is a source of voltage |
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Definition
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Term
| The conductive path installed to connect normally non current carring metal parts of equipment together and to the system grounded conductor or to the grounding electrode conductor or both |
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Definition
| Equipment Grounding Conductor |
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Term
| On or attached to the surface or behind panels designed to allow access |
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Definition
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Term
| All circuit conductors between the sevice equipment the source of a seperately derived system or other power supply source and the final branch circuit overcurrent device |
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Definition
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Term
| An accessory such as a locknut bushing or other part of a wiring system that is intended primarily to perform a mechanical rather than an electrical function |
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Definition
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Term
| A Branch circuit that supplies two or more receptacles or outlets for lighting and appliances |
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Definition
| General Purpose Branch Circuit |
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Term
| A switch intended for use in general distribution and branch circuits. It is rated in amperes and it is capable of interrupting its rated current at its rated voltage |
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Definition
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Term
| A form of general use switch constructed so that it can be installed in device boxes or on box covers or otherwise used in conjunction with wiring systems recognized by this code |
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Definition
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Term
| Connected (connecting)to ground or to a conductive body that extends the ground connection |
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Definition
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Term
| A system or circuit conductor that is intentionally grounded |
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Definition
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Term
| 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 |
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Definition
| Grounding Electrode Conductor |
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Term
| A device intended for the protection of personnel that functions to deenergize a circuit or portion thereof within an establised period of time when a current to ground exceeds the values establshed for a Class A device |
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Definition
| Ground Fault Circuit Interrupter (GFCI) |
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Term
| 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. This protection is provede at current levels less those required to protect conductos from damage through the operation of a supply ciruit overcurrent device |
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Definition
| Ground Fault Protection of Equipment |
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Term
| Covered shielded fenced enclosed or otherwise protected by means of suitable covers casting barriers rails screens mats or platforms to remove the likelihood of approach or contact by persons or objects to a point of danger |
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Definition
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Term
| Recognizable as suitable for the specific purpose function use enviroment application and so forth where describbed in a particular code requirement |
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Definition
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Term
| A branch circuit that supplies only one utilazation equipment |
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Definition
| Individual Branch Circuit |
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Term
| Where this Code specifies that one equpment shall be "in sight from" "within sight from" or "within sight of" and so forth anotherequipment the specified equipment is to be visible and not more that 50 ft distant from the other |
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Definition
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Term
| A qualifying term indicating that no delay is purposely introduced in the tripping action of the circuit breaker |
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Definition
| Instantaneous Trip Ckt Breaker |
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Term
| A conductor encased within material of composistion and thickness that is recognized by this code electrical insulation |
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Definition
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Term
| Operation gor alternate intervals of (1) load and no load, or (2) load and rest, or (3)load, no load and rest |
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Definition
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Term
| A qualifing term indicating that the there is purpsely introduced a delay in the tripping action of the circuit breaker, which delay decreases as the magnitude of the current increases |
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Definition
| Inverse Time Circuit Breaker |
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Term
| Not readily accessible to persons unless special means for access are used |
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Definition
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Term
| Equipment or materials to which has been attached a label, symbol, or other identifying mark of an organization that is acceptable to the authority having jurisdiction and concerned with product evaluation that maintains periodic inspection of production of labled equipment or materails and by whose labeling the manufacturer indicates compliance with appropriate standards or performance in a specified manner |
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Definition
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Term
| An outlet intended for the direct connection of a lampholder or luminaire |
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Definition
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Term
| Equipment materials or services included is a list published by an organization that is acceptable to the anthourity having jurisdiction and concerened with evaluation or products or servises 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 meen tested and found suitable for a specified purpose |
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Definition
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Term
| Energized conductive components |
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Definition
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Term
| A complete lighting unit consisting of a light source such as a lamp or lamps together with the parts designed to psition the light source and connect i to the power suply It may also include parts to protect the light source or the ballast or to distribute the light |
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Definition
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Term
| An assembly of one or more enclosed sections having a common power bus and principally containing motor control units |
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Definition
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Term
| A switch rated in horespower that is capable of interrupting the maximum operating overload current of a motor of the same horespower rating as the switch at the rated voltage |
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Definition
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Term
| A type of surface flush or freestanding raceway designed to hold conductors and receptacles assembled in the field or at the factory |
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Definition
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Term
| A branch circuit that consists of two or more ungrounded conductors that have a voltage between them and a grounded conductor that has equal voltage between it and each ungrounded conductor of the circuit and that is coneected to the neutral or grounded conductor of the system |
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Definition
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Term
| A load where the wave shape of the steady state current does not follow the wave shape of applied voltage |
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Definition
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Term
| A point on the wiring system at whichcurrent is taken to supply utilazation equipment |
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Definition
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Term
| Any current in excess of the rated current of equipment or the ampacity of a conductor it may result from overlaod short circuit or ground fault |
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Definition
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Term
| Operation of equipment in excess of normal full load rating or of a conductor in ecvess of rated ampacity that when it persists for a sufficient length of time would cause damage or dangerous overheating |
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Definition
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Term
| A single panel or gruop of panel units designed for assembly in the form of a single panel including buses and automatic overcurrent devices and equipped with or without switches for the control of light heat or power circuits designed to be placed in a cabinent or cutout box placed in or against a wall parition or other support and accessible only from the front |
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Definition
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Term
| An enclosed assembly that may include recepatacles circuit breakers fuseholders fused switches buses and watt hour meter mounting means intended to supply and control power to mobile homes recreational vehicles park trailers or boats or to serve as means for distributing power required to operate mobile or temporarily installed equipment |
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Definition
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Term
| Interior and exterior wiring including power,lighting, control, and signal circuit wiring together with all their associated hardware fittings, and wiring devices, both permanently and temporarily installed |
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Definition
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Term
| One who has skills and knowledge related to the construction and operation of the electrical equipment and installations and has received safety training to recognize and avoid the hazards involved |
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Definition
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Term
| Constructed protected or treated so as to prevent rain from interfering with the successful operation of the qpparatus under specified test conditions |
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Definition
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Term
| Constructed or protected so the exposure to a beating rain will not result in the entrance of water under specified test conditions |
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Definition
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Term
| Capable of being reached quickly for operation renwal or inspections without requiring those to whom ready access is requisite to climb ofver or remove obstacles or to resort to portable ladders and so forth |
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Definition
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Term
| A receptacle is a contact device installed at the outlet for the connection of an attachment plug. A single receptacle is a single contact device with no other contact device on the same yoke |
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Definition
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Term
| An outlet where one or more receptacles are installed |
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Definition
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Term
| A premises wiring system whose power is derived from a source of electric energy or equipment other than a service. Such systems have no direct electrical connection including a solidly connected grounded circuit conducto, to supply conductors originating in another system. |
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Definition
| Separately Derived System |
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Term
| The conductors and equipment for delivering electriv energy from the serving utility to the wiring system of the premises served |
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Definition
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Term
| The conductors form the service point to the sevice disconnection means |
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Definition
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Term
| The overhead service conductors from the last pole or other aerial support to and including the splices if any connectiong to the service entrance conductors at the building or other structure |
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Definition
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Term
| The sevice conductors between the terminals of the sevice equipment and the point of connection to the service lateral |
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Definition
| Service Entrance Conductors (Underground System) |
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Term
| The service conductors between the terminals of the sevice equipment and a point usually ouside the building clear of building walls where joined by tap or splice to the service drop |
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Definition
| Service Entrance Conductors (Overhead System) |
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Term
| The necessary equipment usually consisting of a circuit breaker or witches and fuse and their accessories connected to teh load end of sercie conductors to a building or other structure or an otherwise designated area and intended to consttitute the main control and cutoff of the supply |
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Definition
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Term
| The underground service conductors between the street main including any risers at a pole or other structure or from transformers and the first point of connection to the sevice entrance conductors in a terminal box or meter or other enclosure, inside or outside the building wall |
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Definition
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Term
| The point of connection between the facilities of the serving utility and the premises wiring |
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Definition
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Term
| The written consent of the AHJ |
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Definition
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Term
| A large single panel frome or assembly of panels on which are mounted on the face back or both, swithces, overcurrent and other protective devices, buses and usually instruments. Accessible from the rear as well as from the front and are not intended to be installed in cabinets |
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Definition
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Term
| An automatic or nonautomatic device for transferring one or more load conductor connections from one powers source to another |
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Definition
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Term
| Equipment that utilizes electric energy for eletronic, electomechanical, chmical, heating, lighting or similar purposes |
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Definition
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Term
| A nominal value assigned to a circuit or system for the purpose of conveiently desgnating its voltage class |
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Definition
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Term
| For grounded circuits the voltage between the givben conducto and that point or coductor of the circuit that is grounded for ungrounded circuits the greates voltage between the given conductor and any other conductor of the circuit |
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Definition
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Term
| Constructed so that misture will not enter the enclosure under specified test conditions |
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Definition
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Term
| Constructed or protected so that exposure to the weather will not interfere with successful operation |
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Definition
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Term
| Installations underground or in concrete slabs or masonary in direct contact with the earth in locations subject to saturation with water or other liquids such as vehicle washing areas |
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Definition
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Term
| A device intended to provide protection from the effects of arc faults by recognizing characteristics unique to arcing and by functioning to de-energize the circuit when an arc fault is detected |
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Definition
| Arc Fault Circuit Interupter |
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Term
| The connection between the grounded circuit conductor and the supply-side bonding jumper, or the equipment grounding conductor, or both, at a separately derived system |
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Definition
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Term
| Equipment enclosed in a case that is capable of withstanding an explosion of a specified gas or vapor that may occur within it and of preventing the ignition of a specified gas or vapor surrounding the enclosure by sparks, flashes, or explosion of the gas or vapor within, and the operates at such an external temperature that a surrounding flammable atmosphere will not be ignited thereby |
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Definition
| Explosion Proof Equipment |
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Term
| An unintentional, electrically conducting connection between an ungrounded conductor of an electrical circuit and the normally non current carrying conductors metallic enclosures metallic raceways metallic equipment or earth |
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Definition
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Term
| A conducting object through which a direct connection to earth is established |
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Definition
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Term
| An accommodation combining living sleeping sanitary and storage facilities within a compartment |
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Definition
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Term
| The highest current at rated voltage that a device is identified to interrupt under standard test conditions |
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Definition
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Term
| A device that provides a means for connecting bonding conductors for communications systems to the grounding electrode system |
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Definition
| Intersystem Bonding Termination |
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Term
| The overhead conductors between the service point and the first point of connection to the service entrance conductors at the building or other structure |
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Definition
| Service Conductor Overhead |
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Term
| The underground conductors between the service point and the first point of connection to the service entrance conductors in the terminal box meter or other enclosure inside or outside the building wall |
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Definition
| Service Conductors Underground |
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Term
| The prospective symmetrical fault current at a nominal voltage to which an apparatus or system is able to be connected without sustaining damage exceeding defined acceptance criteria |
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Definition
| Short Circuit Current Rating |
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