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Term Description
Specific Gravity The ratio of the density (mass per unit volume) of a material to that of water
Specific Inductive Capacity (S.I.C.) See definition for "Dielectric Constant"
Spiral Shields A type of shield made up of single strands of wires spirally wrapped around a conductor or cable core, more flexible and easier to terminate than woven braid. Typically has a nominal coverage of 95% to 98%.
Spiral Wrap The helical wrap of a material over a core
Stability Factor The difference between the percentage power factor at 80 volts/mil and at 40 volts/mil measured on wire immersed in water at 75C for a specified time
Standing Wave The stationary pattern of waves produced by two waves of the same frequency traveling in opposite directions on the same transmission line
Standing Wave Ratio (SWR) The ratio of the maximum amplitude to the minimum amplitude of a standing wave (stated in current or voltage amplitudes)
Static Condition Used to denote the environmental conditions of an installed cable rather than the conditions existing during cable installation
Strand A single uninsulated wire
Stranded Conductor A conductor composed of individual groups of wires twisted together to form an entire unit
Strip Force The force required to remove a small section of insulating material from the conductor it covers
Styrene-Butadiene Rubber (SBR) A synthetic rubber that possesses excellent abrasion resistance electrical characteristics, decomposes when exposed to oil, ozone, and weather. Has an operating temperature range of -55°C to 90°C. Highly flammable unless flame retardants are added.
Suggested Working Voltage AC voltage that can be applied between adjacent conductors
Surface Resistivity The resistance of a material between two opposite sides of a unit square of its surface (usually expressed in ohms)
Surge A temporary and relatively large increase in the voltage or current in an electric circuit or cable (also called "transient")
Surlyn DuPont's trade name for their thermoplastic resin with ionic crosslinks`
Sweep Test A 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 Cable A cable used within and between the central office, main frames, and switchboard

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