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Glossary of Electrical Industry Terms

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Glossary of Electrical Industry Terms GLOSSARY OF ELECTRICAL INDUSTRY TERMS A CONCRETE RING – see concrete box. ADD-A-DEPTH RING – a means of extending CABLE – two or more insulated conductors the walls of a device box to the wall surface, wrapped in metal or plastic sheathing. CONCRETE-TIGHT FITTING – a fitting that, providing a barrier between a wiring device and CABLE BOX – a box provided with clamps to when assembled to conduit or tubing of the the surrounding wall material. accommodate either metallic or nonmetallic proper size, excludes concrete aggregate. sheathed cable. AIR PLENUM – a compartment or chamber to CONDUCTOR FILL – refers to the number of which one or more air ducts are connected and CABLE CLAMP – generic name for a clamp current carrying and grounding conductors which forms part of the air distribution system. that mechanically secures the cable to the permitted by the National Electrical Code electrical outlet box. (NEC) to be used in conduit and tubing. AMP (A) – a measurement of the amount of electrical current in a circuit at any moment. CANADIAN STANDARDS ASSOCIATION CONDUCTORS – electrical term describing (CSA) – an independent testing agency that wires capable of carrying an electrical current ARMOR – a metallic covering around the cable certifies products to its established standards of or wire being used as a ground, usually for mechanical protection. Typically interlocked safety and performance. sheathed with an insulating material. steel or aluminum. CARPET FLANGE – a ring that is used with a CONDUIT – (raceway) a pipe or tube designed ARMORED CABLE CLAMP – a means of floor box to provide a decorative finish. to enclose and protect conductors or cables securing armored cable to a box, providing an from moisture and physical damage. electrical ground. The clamp will accommodate CHASE NIPPLE – a term used for a threaded two cables. nipple. CONDUIT BODY – a portion of a conduit or tubing system that provides access through a CIRCUIT – the path of electrical flow from a removable cover(s) to the interior of the system B power source through an outlet and back to at a junction of two or more sections of the BX – see flexible armored cable. ground. system or at a terminal point of the system. BAR HANGER – a means that is used to CLAMP BACK – a raceway fastening CONDUIT CLAMP – a fastening clamp used to position a lighting fixture or fan between ceiling accessory typically used with a conduit strap to mount raceways. joists or studs. The bar hanger may be position a raceway away from a wall. adjustable, and permits the electrical outlet box CONDUIT HANGER – a fastening means used to be positioned along its length. CLASS I locations – are those locations in to support conduit. which flammable gases or vapors are or may BEAM CLAMP – a fastening means, usually be present in the air in quantities sufficient to CONDULET – a term used to refer to malleable made of malleable iron or steel, commonly produce explosive or ignitable mixtures. or aluminum conduit bodies. used with hangers and a threaded rod to fasten a raceway to an I-beam. CLASS II locations – are those locations that CONNECTOR – a fitting intended to terminate are hazardous because of the present a cable or raceway into a box, panel, etc. BELL BOX – a Hubbell Inc. trade name for the combustible dust. BELL® brand of weatherproof boxes. CORD GRIP (CG) – a connector used to CLASS III locations – are those locations that terminate flexible cords and cables into an BLOCK-LOC ®– a Hubbell Inc. trade name for are hazardous because of the presence of enclosure. self-positioning masonry boxes and tile covers. easily ignitable fibers or flyings, but in which the fibers or flyings are not likely to be in COUPLING – a fitting intended to connect two BONDING – the permanent joining of metallic suspension in the air in quantities sufficient to lengths of raceway. parts to form an electrically conductive path produce ignitable mixtures. that will assure electrical continuity and the capacity to conduct safely any current likely to D CLEAT HANGER – see bar hanger. DAMP LOCATION – partially protected be imposed. locations such as under canopies or roofed CODEGUARD® – RACO trademark for open porches, and interior locations subject to BOX EXTENSION – see extension ring. weatherproof cover and Hubbell WRTR device. moderate degrees of moisture, such as basements, barns, and cold-storage BOX-LOC®– RACO trade name for our snap- COMBINATION COUPLING – a coupling on metal stud bracket. warehouses. device used to join two dissimilar raceways (ie., rigid and flex). BOX MOUNT – a term commonly used to DEVICE EARS – ears or tabs with holes spaced to accommodate wiring devices. Device denote where the screws of a cover attach. CONCENTRIC KNOCKOUT – a combination ears are found on plaster rings, switch boxes knockout where all the knockouts have the and handy boxes. BUSHING – a fitting provided to protect wires same center (eg., masonry boxes). from abrasion and intended for use where DEVICE MOUNT – a term commonly used to conductors enter or leave the raceway system. CONCRETE BOX – a box intended for use in denote where the screws of a device cover concrete and masonry block. It is not intended attach. C for installation in a floor. CSA – see Canadian Standards Association. GLOSSARY OF ELECTRICAL INDUSTRY TERMS DUPLEX RECEPTACLE – Electrical outlet GORILLA-RING®– a RACO® concrete ring UL device having two plug receptacles. FINISHED WALLS – studs, furring strips, approved for fixture and ceiling fan support. joists, that are covered with wood paneling, DURALO® – is a trademark identifying a tri- drywall, plaster, Masonite or ceramic are GOTCHA – term for a split hinge design ring coat protective finish used on iron electrical considered finished. used in Hubbell strain relief cord connectors. conduit fittings for standard and hazardous locations. FIXTURE – a lighting assembly that is GREENFIELD – see flexible metal conduit. permanently attached to a building’s wiring E system, usually to a ceiling box. GRID-BRACE® – A Hubbell Inc. trade name for 8B – a 4 in. octagon box that is 1-1/2 in. deep. a ceiling support assembly designed for ceiling FIXTURE EARS – ears or tabs with holes in fan or fixture support for suspended ceilings. 8B DEEP – a 4 in. octagon box that is 2-1/8 in. them spaced 2- 3/4 in. or 3- 1/2 in. apart to deep. accommodate lighting fixtures. GRIP-LOK – refers to old work clips used to secure switch boxes with plaster ears in hollow ELBOW – a curved section of raceway FLEX – see flexible metal conduit. walls. intended to change the direction of the run. FLEXIBLE ARMORED CABLE (BX) – GROUND – a conducting connection between ELECTRICAL METALLIC TUBING (EMT OR commonly called BX, a manufacturer’s trade an electrical circuit or equipment and the earth, THINWALL) – conduit called thinwall as a name. It may be described as prewired flexible or to some conducting body that serves in contrast to the “heavywall” of rigid or IMC. metallic conduit since it includes two or more place of the earth. Neutral wires carry the current carrying conductors and can be current to ground in all circuits. An additional ELECTRICAL NONMETALLIC TUBING (ENT) supplied with a grounding conductor. grounding wire, or the sheathing of metal clad – a plastic corrugated raceway of circular cross cable or conduit, protects against shock from a section that is resistant to moisture and FLEXIBLE METAL CONDUIT (GREENFIELD malfunctioning tool or other device. chemical atmospheres, and that is flame OR FLEX) – frequently called “Greenfield,” retardant. which is the trade name of one manufacturer of GROUND FAULT CIRCUIT INTERRUPTER this flexible steel or aluminum raceway. It is (GFCI) – a safety device that senses shock ELECTROPLATING – a term used to describe used around machinery where vibration or hazard and automatically stops electrical flow in the process of electrically depositing a layer of movement exists or where complex routing of a circuit. corrosion resistant material (i.e., zinc) onto the raceway dictates a flexible conduit. steel or iron parts. GROUND FITTING – a fitting used to attach a FLOOR BOX – a box provided with means for grounding conductor to a ground pipe or rod. EMT – see electrical metallic tubing. flush mounting in a floor. The floor box may be used to provide power, telephone or data GROUND LUG – means used to connect a END RUN – that portion of the branch circuit connections in office or store areas. ground wire to a fitting, clamp, or enclosure. that extends to the last fixture or device. Generally made of copper, aluminum, brass or FLUSH-FIT® – a Hubbell Inc. trade name for a bronze. ERICKSN® COUPLING – a registered trade device leveling plate that corrects loose and name for a three-piece coupling used for recessed devices. GROUND SCREW – a UL listed screw used to rigid/IMC conduit. secure a grounding conductor to an enclosure. FORM 7 – a style of conduit body that requires ETL –certification mark for Intertek Testing a clip cover. GROUND WIRE – the conductor used to Services. ITS tests to the standards of UL, CSA connect the electrical equipment to ground (or and other international standards. FORM 8 – an “expanded volume” style of earth) at the service entrance point, minimizing conduit body that requires a two screw cover. the potential for electrical shock. Usually clad in EXPOSED WORK – boxes and branch circuits green insulation or unclad. that are mounted external or exposed on walls, FORM 35 – a style of conduit body that beams, columns, etc. requires a two screw cover. H HANDY BOX – box designed for enclosing EXTENSION RING – used to extend the box FURRING STRIPS – small wood strips devices; usually surface mounted. when it is recessed back in a wall. Also attached to an existing wall to provide a means provides more cubic inch capacity for the box if to attach paneling or drywall.
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