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Glossary/Dictionary

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Term Description
SAEAbbreviation for Society of Automotive Engineers
SCSI(Small Computer System Interface) AN ANSI standard which defines mechanical, electrical, and funcitional requirements for interconnection of small computers and peripherals and other small computer systems
Secondary InsulationA high resistance dielectric material which is placed over primary insulation to protect it from abrasion
Self-ExtinguishingThe characteristic of a material whose flame is extinguished after the igniting flame is removed
Self-supporting Aerial CableA cable consisting of one or more insulated conductors factory-assembled with a messenger which supports the assemblage and which may or may not form a part of the electric circuit
Self-supporting CableAny assemblage of conductors which incorporates a steel rope or steel sheath for added tensile strength, thus enabling it to be suspended between widely spaced supports
Semi-Conducting TapeA tape of such resistance that when applied between two elements of a cable, the adjacent surfaces of the two elements will maintain substantially the same potential
SemiconductorA material that has a resistance characteristic between that of insulators and conductors
Semi-Rigid PVCA hard semi-flexible polyvinylchloride compound with low plasticizer content
SeparatorA layer of insultating material such as textile, paper, polyester, etc. Used to improve stripping qualities and flexibility and to provide mechanical or electrical protection to the underlying components
ServeA filament or group of filaments such as fibers or wires, wound around a central core
Served Wired ArmorSpiral wrap of soft galvanized steel wires wrapped around a cable to afford mechanical protection and increase the cable pulling tension characteristics
SheathThe outer covering or jacket of a cable
ShieldA metallic layer placed around a conductor or group of conductors to prevent electrostatic interference between the enclosed wire and external fields
Shield CoverageThe physical area of a cable that is optically covered by the shielding material. Expressed in percent.
Shield EffectivenessThe relative ability of a shield to screen out undersirable signals
Shock TestA test to determine the ability of a cable to withstand a violent physical concussion such as might occur during handling or use
SignalA current used to convey information, either digital, analog, audio or video
Signal CableA cable designed to carry current of usually less than one ampere per conductor
SinteringFusion of a spirally applied tape wrap jacket by the use of high heat to a homogeneous continuum. Usually employed for fluorocarbon, nonextrudable materials
Skin EffectThe tendency of alternating current, as its frequency increases, to travel only on the surface of a conductor
SNMA cable designed for use in hazardous locations consisting of insulated conductors in a extruded nonmetallic jacket which is then covered with an overlapping spiral metal tape & wire shield
Solid ConductorA conductor consisting of a single strand of wire
SpacingDistance between the closest edges of two adjacent conductors
SpanIn flat cables, the distance from the reference edge of the first conductor to the reference edge of the last conductor or the distance between the centers of the first & last conductor expressed in inches or centimeters.
Spark TestA test designed to locate imperfections (usually pinholes in the insulation of a wire or cable by application of a voltage for a very short period of time while the wire is being drawn through the electrode field
Specific GravityThe ratio of the density (mass per unit volume) of a material to that of water
Specific Inductive Capacity (S.I.C.)Same as dielectric constant
Spiral WrapThe helical wrap of a material over a core
Stability FactorThe difference between the percentage power factor at 80 volts/mil and at 40 volts/mil measured on wire immersed in water 75C for a specified time
Standing WaveThe stationary pattern of waves produced by two waves of the same frequency traveling in opposite directions on the same transmission line
Standing Wave Ration (SWR)A ratio of the maximum amplitude to the minimum amplitude of a standing wave stated in current or voltage amplitudes
Static ConditionUsed to denote the environmental conditions of an installed cable rather than the conditions existing during cable installation
StrandA single uninsulated wire
Stranded ConductorA conductor composed of individual groups of wires twisted together to form an entire unit
Strip ForceThe force required to remove a small section of insulating material from the conductor it covers
Suggested Working VoltageAC voltage that can be applied between adjacent conductors
Surface ResistivityThe resistance of a material between two opposite sides of a unit square of its surface. It is usually expressed in ohms
SurgeA temporary and relatively large increase in the voltage or current in an electric circuit or cable. Also called transient.
SurlynDuPont's trade name for their thermoplastic resin with ionic crosslinks`
Sweep TestA method to determine the frequency response of a cable by generating an RF voltage whose frequency is varied at a rapid constant rate over a given range
Switchboard CableA cable used within and between the central office and main frames and the switchboard