Term
| National Electric code (NEC) |
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Definition
| The most informative and authoritative body of information concerning electrical wiring installation in the united states. |
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Term
| Authority having Jurisdiction (AHJ) |
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Definition
| The person or group of people responsible for approving the equipment, materiel's, And installations, or a procedure. |
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| Nationally recognized testing Laboratory (NRTL) |
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Definition
| A recognized testing agency that testes materiel's and equipment submitted to them by electrical materiel manufactures to verify that the item is suitable for electrical installation. |
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Term
| Occupational safety and health administration (OSHA) |
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Definition
| An agenecy withen the united states department of labor that is responsable for creating and enforcing health and safety standards to protect persons in all occupations within the U.S. |
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Term
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Definition
| The wires installed in the buildings that provide the electrical power throught |
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Term
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Definition
| In residential construction. The materiel's and components used to deliver electricity from the service panel to the electrical devices. The wiring system includes the wire, its insulating cover, a protective cover, and the connectors that fasten it to the electrical box |
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Definition
| An arrangement of two or more conductors in a protective covering assembled by the manufacturer |
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Term
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Definition
| An assembly of insulated wires contained within a flexible metallic armor for protection |
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Term
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Definition
| Another name for armored cable (AC). BX is a trade name attribuated to the Spragve Electric division of General Electric |
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Term
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Definition
| The metallic spiral tubing that protects the conductors in armord cable |
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Term
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Definition
| A peice of wire manufactured into AC that runs length of the armor and is in constant contact with it. It provides the continues ground necessary in a banded system |
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Term
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Definition
| A red split, Plastic sleeve placed between the wires and the rough edge of the armor in AC |
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Term
| Nonmetallic sheathed cable (NM) |
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Definition
| A cable with 2 or more conductor's and a ground all withen an outer jacket, sutable for use in most residential installations except were conduit is required. NM is called romex in the trade |
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Term
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Definition
| The trade name for NM cable invented by General cable. It has come into popular use when referring to any brand of NM cable |
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Term
| Service-Entrance cable (SE) |
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Definition
| Service-entrance cable that is approved for direct burial in the ground |
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Term
| Underground Service-entrance cable (USE) |
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Definition
| Simular to NM, This cable is suitable for direct burial in the ground. It is used for providing power to detached garages, yard lamps, and outbuildings. |
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Term
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Definition
| A system of conduit, Boxes and fittings through wires are pulled. |
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Term
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Definition
| Round hallow tubing that is metal or plastic, rigid or flexible, that is used to protect wires from physical damage |
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Term
| Electrical metallic tubing (EMT) |
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Definition
| Conduit made of aluminum with relatively thin walls, Also called thin walled conduit. The simaller sized can be easily bent with a hand tool |
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Term
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Definition
| A conduit bend that is made in the field (on the work site). |
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Term
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Definition
| A 90 degree bend used to bring a usually horizontal run of conduit up into a device box. Also called a stub-up bend |
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Term
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Definition
| Describes two 90 degree bends in the same piece of conduit, regardless of the distance between bends. |
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Term
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Definition
| Two bends of equal angle a short distance apart to allow a conduit run to clear an obstacle |
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Term
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Definition
| The effective shortening of the overall length of a piece of conduit due to bending. |
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Term
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Definition
| The small offset, or "Kick," needed in the end of a piece of conduit so it can enter a knockout in a junction box or a device box |
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Term
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Definition
| Most commonly a bend made of three bends close together used when the conduit has to leave it's surface. There is also a four-bend saddle, which consists of two offsets back-to-back or a short distance apart. |
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Term
| Electrical nonmetallic tubing (ENT) |
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Definition
| Plastic corrugated tubing that provides a flexable conduit. also called smurf because one type of ENT is A bright blue color, like the smurf cartoon characters. |
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Term
| Rigid metal conduit (RMC) |
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Definition
| This is the original conduit used before thin wall and IMC. RMC also called heavy-walled conduit, has a thick walls and provides the greatest protection for the wires inside. small sizes must be machine-bent |
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Term
| Rigid polyvinyl chloride conduit (PVC) |
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Definition
| A conduit that is constricted of polyvinyl chloride (PVC), A though, non conductive plastic. |
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Term
| Intermediate metal conduit (IMC) |
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Definition
| Conduit with walls thicker then EMT but thinner then RMC. Has many advantages over RMC because it is lighter in weight and has more room inside for pulling wires. |
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Term
| Flexible metal conduit (FMC) |
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Definition
| Metal corrugated tubing that provides a flexible conduit. |
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Definition
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Term
| Liquid tight Flexible Metal conduit (LFMC) |
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Definition
| This conduit is FMC with a water proof outer coating and special fittings to maintain its watertight integrity. |
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