Portable cords, fitted with any type of wiring device at one or both ends. Also spelled as one word.

A cable using stranded conductors for flexibility as in distribution cords or line cords. Line cords can also use tinsel conductors.

Tire cord wire is made from silicon-killed, hot-rolled, Stelmore-cooled steel rod. It is used to reinforce elastomeric components, e.g., rubber, of a pneumatic tire to give the tire shape, size-stability, bruise resistance, durability, and load-carrying capability. Wire used for tire reinforcement has very demanding requirements regarding specific properties such as tensile strength, adhesion, durability and modulus. Tire cord wire is electrolytic brass-coated, high carbon (0.65% - 0.85%) steel wire drawn to high strength levels and cabled or stranded into constructions suited for reinforcing belts and carcasses of pneumatic tires.

In cables, a component or assembly of components over which other materials are applied, such as additional components, shield, sheath, or armor. Also: a body of sand or other material placed in a mold to produce a cavity of desired shape in a casting; a tubular defect that comes from the surface of a billet and appears at the back end of extruded rod.

A blister that occurs in the core of clad products.

Measure of the displacement of the center of the core relative to the cladding center.

Measure of the non-roundness of the core.

That part of the electrical energy required to magnetize a core of magnetic material that is dissipated as heat generated within the core, as distinguished from the energy lost in the coil surrounding the core.

Another name for the extruder tips used when extruding a plastic or rubber insulation coating on wire with an extrusion machine. Alternatively, the tube into which the die tips screw.

The center strand of a stranded conductor, around which the outer strands are wrapped in spiral layers. Employed as core or foun­dation wire in certain types of wire rope construction. Drawn to various sizes and usually fully annealed for ordinary strand ropes, but for certain constructions a hard, high-carbon wire, finished to a specified tensile stress, is employed. Also, the wire used in the construction of sand cores placed in molds for the production of castings. This is a low-carbon steel wire, fully annealed at finished size and with a black annealed finish or cleaned and oiled.

Core member of a wire rope about which the strands are laid. It may be fiber, a wire strand or an indepen­dent wire rope.

Tungsten carbide die blanks that are prepared with a preformed hole before sintering, reducing drilling time considerably. The smallest holes pre­formed are about 0.004-5 in. (0.1–127 mm); below this, holes have to be drilled in the solid blank.

Cracks that initiate at the corner of a square or rectangular section of metal and proceed toward the center. They can form in a cast billet section as a response to cooling dynamics. Corner cracks can also form or open during hot rolling operations.

A visible electrical discharge from a conductor in the form of a “blue glow,” caused by sharp edges of damaged spots in a high-voltage line. It is more obvious when the conductor is bare and has a profile of a sharp point or edge. It is disruptive to line-of-sight signals such as antenna T.V. and radio.

See Voltage, Corona Extinction.

The critical value in the application of an electrical potential where a corona is first observed.

The minimum value of falling rms voltage that sustains electrical discharge from surface irregularities of bare cable or within the vacuous or gas filled spaces in the cable construction or insulation.

The total time that an insulation system, placed in a high voltage electrical field that leads to continuous coronoa discharge, can remain in corona discharge before total dielectric discharge failure occurs.

Chemical action that causes destruction of the surface of a metal by oxidation or chemical combination. Gradual chemical or electrochemical attack on a metal by atmosphere, moisture or other agents.

The severe loss of ductility of a metal resulting from corrosive attack, usually intergranular and often not visually apparent.