Accession Number : AD0677521

Title :   CORROSION EVALUATION OF SHIELDING MATERIALS FOR DIRECT BURIAL TELEPHONE CABLES,

Corporate Author : RURAL ELECTRIFICATION ADMINISTRATION WASHINGTON D C TELEPHONE STANDARDS DIV

Personal Author(s) : Lohsl,Gerald A. ; Romanoff,Melvin

Report Date : 1968

Pagination or Media Count : 24

Abstract : Buried telephone cables used in the Rural Electrification Administration (REA) Program have, since the initial installation, incorporated a copper shield because of its high conductivity and excellent corrosion resistance in most underground environments. To meet this demand REA has set up a cooperative program with the National Bureau of Standards (NBS) to develop and investigate alternate metals or combinations of metals and materials for use as a shield in buried telephone cables. Such a shielding material, in addition to being economical and abundant, should have the following characteristics: (1) High conductivity (good shielding characteristics); (2) Flexible; (3) Easily corrugated and formed; (4) Corrosion resistance to all soil environments; (5) Resistance to gopher penetration. (Author)

Descriptors :   (*TELEPHONE LINES, SHIELDING), (*ELECTRIC CABLES, SYMPOSIA), UNDERGROUND, CORROSION, SOILS, COATINGS, EXPOSURE(PHYSIOLOGY), COPPER ALLOYS, STEEL, PHYSICAL PROPERTIES, DRAINAGE, CHEMICAL PROPERTIES, PLASTICS, METALS, THICKNESS, ALUMINUM ALLOYS, CONDUCTIVITY, MECHANICAL PROPERTIES, COSTS, LAMINATES

Subject Categories : Electrical and Electronic Equipment
      Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE