LIGHTNING PROTECTION OF BURIED CABLE BY SEMI-CONDUCTING JACKETS

Abstract

Semi-conducting jackets on buried telephone cable will be subjected to heavy surge currents caused by local lightning strokes to ground. The impulse current strength of a semi-conducting polyethylene compound, having a nominal resistivity of 20 ohm-cm, is measured and the effects of some environmental factors assessed. It is concluded that the probability of surge current rupture of the cable jacket in service is very small except when direct strokes to the cable occur.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1965
Accession Number
AD0479569

Entities

People

  • H. D. Campbell

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Gaps
  • Boundaries
  • Construction
  • Current Density
  • Dielectric Polymers
  • Extrusion
  • Field Conditions
  • Films
  • Impedance
  • Lightning
  • Lightning Protection
  • Materials
  • Measurement
  • Resistance
  • Telephone Lines
  • Thin Films
  • Voltage

Readers

  • Atmospheric Science/Meteorology
  • Electrical Engineering
  • Polymer Science and Engineering.