SEMI-CONDUCTOR - Any of a class of solids whose electrical conductivity is between that of a conductor and that of an insulator in being nearly as great as that of a metal at high temperatures and nearly absent at Low temperatures.
SEMI-RIGID - Rigid to some degree or in some part.
SEMI-TIGHT BUFFER - Type of optical fiber cable construction where each fiber is loosely surrounded by a protective coating to a diameter of 900 microns.
SEPARATOR - Layer of insulating material between: (a) Conductors and insulation; and (b) Between cable components and jacket.
SERVING OF A CABLE - A serve is a separator applied directly over the conductor. The serve may consist of one or a combination of materials such as paper, cotton, silk, nylon, or rayon. These materials may be applied spirally or laterally.
SF - Fixture wire, silicone rubber insulated. Can be solid or stranded.
SFF - Same as SF but in flexible grade stranding.
SH-A - Portable power cable, commonly known as shovel cable, Neoprene® jacket, usually three or four conductors individually shielded. Cable rated 5 kV. Neoprene® is a trademark of the DuPont de Nemours Co.
SH-B - Similar to SH-A except shield over all conductors.
SH-C - Similar to SH-B except with grounds.
SH-D - Similar to SH-A except with grounds.
SHEATH - The outer covering or jacket over the insulated conductors to provide mechanical protection for the conductors.
