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.
SHF - Abbreviation for super high frequency. See frequency band.
SHIELD - In cables, a metallic layer placed around a conductor or group of conductors to prevent electrostatic or electromagnetic interference between the enclosed wires and external fields.
SHIELD COVERAGE (PERCENTAGE) - The physical area of a cable that is actually covered by the shielding material and is expressed in percent.
SHIELDED CONDUCTOR - An insulated conductor which has been shielded by a copper braid or tape, aluminum foil, copper foil, or a semi-conductive vinyl. The purpose is to confine the electrical field.
