Resistance to surface wear.
A test that attempts to duplicate long-term environmental aging in comparatively short time spans.
A chemical additive, which hastens a chemical reaction under specific conditions.
The changes in a material’s properties that occur with time, under specific conditions.
A compound formed when two or more different metals are combined to create a new metal with desirable properties.
An aluminum wire, or group of wires, which is not suitably insulated to carry an electrical current.
A composite conductor made up of aluminum and steel wires.
The temperature of a medium (gas or liquid) surrounding an object.
A fibrous or metallic group of filaments, interwoven in cylindrical form to create a covering over one or more wires.
The smaller of the two angles formed by a shielding strand and the axis of the cable being shielded.
A spool or bobbin on a braid, which holds one group of strands or filaments and revolves during braiding operations.
The number of strands used to make up one carrier. Strands are wound side by side on the carrier bobbin, and lie parallel in the finished braid.
A machine used to apply braids to wire and cable and produce braided sleeving, as well as braids for tying or lacing purposes. A braiding machine is identified by the number of carriers it has.
A device used to line an opening, which prevents abrasion to any wires and cables that are being passed through that opening.
The overall protective covering applied to cables.
The destruction of the surface of a metal by chemical reaction.
A calculated percentage that defines the level of completeness with which a metal braid covers an underlying surface. The higher the percentage of coverage is, the greater the protection against external interference.
Textile braid, rubber jacket, plastic or any other material applied over wire and cables to provide mechanical protection and identification.
The dimensional change that occurs with time to a material under load.
To change the physical properties of a material by chemical reaction.
The time, temperature and pressure required for curing.
Electromagnetic Interference (EMI):
The interference in signal transmission or reception resulting from the radiation of electrical and magnetic fields. Synonym: Radio Frequency Interference.
Electromotive Force (EMF):
Pressure or voltage, the forces that cause current to flow in a circuit.
The fractional increase in the length of a material stressed in tension.
In braiding, the number of parallel wires or threads on a carrier.
A thread or threadlike structure. Also, a single discrete element used to transmit optical (light wave) information.
Fiber characterized by extreme length.
The ability of a material to not propagate flame once a heat source is removed.
The measure of the material's ability to support combustion.
A woven braid of tinned copper strands, rolled flat to a specified width at the time of manufacture.
The ease with which a cable may be bent.
Expanded copper mesh, which can be laminated – as a shield – into various flat cable constructions.
Distortion to a material’s flow or configuration, as a result of exposure to heat.
High-Temperature Wire and Cable:
Electrical wire and cables having operating temperatures of 150°C and higher.
Capable of absorbing moisture from the air.
DuPont's trade name for their chlorosulfonated polyethylene, an ozone-resistant synthetic rubber.
Index of Refraction:
The ratio of light’s velocity in a vacuum to its velocity in a given transmitting medium.
A device, which mechanically couples and electrically insulates the sheath and armor of contiguous lengths of cable.
An outer protective sheath over primary insulation, braids, shields, cable components, or the cable itself. In fiber optics, a jacket is a covering that protects a fiber, fiber bundle or cable against the environment.
Joint Army-Navy specification (replaced by current Military Specifications).
Pennwalt trade name for polyvinylidene fluoride, a material typically used as insulation for wire wrap wire.
Is the registered trademark for a light, strong para-aramid synthetic fiber, related to other aramids such as Nomex and Technora
A liquid resin or compound applied to textile braid to prevent fraying, moisture absorption, etc.
A flat or corrugated tape shield that is applied longitudinally, with the axis of the core being shielded.
See Longitudinal Shield .
Modulus of Elasticity:
The ratio of stress to strain in an elastic material.
The amount (in percentage) of moisture that a material will absorb under specified conditions.
A material’s ability to resist the absorption of moisture from both air and water.
DuPont trademark for polyester film.
DuPont trademark for a temperature- resistant, flame-retardant nylon.
A thermoplastic with good chemical and abrasion resistance.
The accelerated aging of cabling, achieved by placing the cable in an oil bath and heating it to a preset temperature for a stated amount of time.
The dissipation of gas from a dielectric, evidencing decomposition.
The percentage of oxygen necessary to support combustion in a gas mixture.
A reactive form of oxygen, typically found around electrical discharges and present in the atmosphere in small quantities.
The distance between two adjacent braid-filament crossover points. A measurement in picks per inch indicates the degree of coverage provided by a braided sleeve or shield.
A change in dimension that occurs under load, which is not recovered when the load is removed.
A chemical agent added to plastics to make them softer and more pliable.
Polyethylene terephthalate, a material used extensively as a moisture-resistant cable core wrap.
A thermoplastic material having excellent electrical properties.
A general name for polymers containing halogen atoms. The halogens are fluorine, chlorine, bromine and iodine.
Polymer: A material of high molecular weight, formed by the chemical union of monomers.
Polyolefin: Any of the polymers and copolymers of the ethylene family of hydrocarbons.
A thermoplastic that is similar to polyethylene, with the exception of being stiffer and having a higher softening point (temperature); also possesses excellent electrical properties.
Multiple voids in an insulation cross- section.
See Pull Tension.
The maximum pulling force that can be safely applied to a cable without damage.
Polyvinyl Chloride (PVC):
A general-purpose thermoplastic, widely used for wire and cable insulations and jackets.
A type of layered cable sheath, constructed with an additional reinforcing material, usually a braided fiber, molded in place between layers.
A flat cable of individually insulated conductors lying parallel and held together by means of adhesive or woven textile yarn.
Rubber (Wire Insulation):
Term used to describe wire insulations made of thermosetting elastomers; occurs naturally or may be made synthetically.
DuPont's trade name for their flame- retardant polyethylene insulating material.
A nonconductive material that protects a cable’s conductor against abrasion and provides a second electrical barrier.
Characteristic of a material whose flame is extinguished after the igniting flame source is removed.
A cable jacket that has a resistance level sufficiently low enough to give its outer surface a substantial degree of grounding potential.
A cable containing a flexible inner core and relatively inflexible sheathing.
An insulation cross-section having a partially open space between the conductor and the insulation perimeter.
A filament or group of filaments, such as fibers or wires, which are wound around a central core.
A wrapping applied over the core of a cable or over a wire.
See Cable Sheath.
A metallic layer placed around a cable’s conductor to prevent electrostatic or electromagnetic interference between the enclosed wires and external fields.
The degree to which a cable’s surface is covered by shielding material.
A shield’s ability to screen out undesirable signals.
A material made from silicon and oxygen, which can be found either in thermosetting elastomer form, which is noted for its high heat resistance, or as a liquid.
A silicone liquid treatment applied to insulated conductors to allow for easy jacket stripping.
Widely separated braid of copper or steel fibers, used to hold cable cores together, reinforce cable jackets, and provide shielding against electromagnetic interference.
A braided, knitted or woven tube used as insulation over wires or components . Also called Sleeving.
The ratio comparing a material’s density (mass per unit volume) to that of water.
A metallic shield of fine-stranded wires, applied in a spiral rather than in braid form.
A joining of conductors, generally from separate sheaths.
A device used to protect a cable or wire splice.
The force required to initiate or continue a tear in a material under specified conditions.
DuPont company trade name for fluorocarbon resins. FEP, PFA and TFE are typical materials.
DuPont trade name for a fluorocarbon material typically used as wire wrap insulation.
The pull stress required to break a given specimen.
Any braid made from threads of cotton silk, or synthetic fibers.
Exposure to a thermal condition or programmed series of conditions for preset periods of time.
Thermoplastic: A material, which softens when heated and becomes firm upon cooling.
Thermoset: A material that hardens or sets when heat is applied, and which, once set, cannot be re-softened by heating. The application of heat is called "curing."
Tin Overcoat (TOC):
Tinned copper wire, stranded, then coated with pure tin.
A chemical reaction in which the physical properties of an elastomer are changed by reacting it with sulfur or other cross-linking agents.
The thickness of the applied insulation or jacket.
A test to determine the amount of water absorbed by a material after a given immersion period.
Wire and Cable Tying, Clamping, and Harnessing Devices:
Tying tapes, lacing cords and flexible sleevings, which are used to bundle, harness and confine wire and cable . Other devices include plastic ties or clamps, spiral-cut plastic tubing and plastic U-shaped trays or ducts.
DuPont's trade name for nylon resins.