Electricity: conductors and insulators – Conduits – cables or conductors – Single duct conduits
Patent
1983-12-27
1986-02-18
Askin, Laramie E.
Electricity: conductors and insulators
Conduits, cables or conductors
Single duct conduits
174106SC, 174106D, 174107, H02G 906, H02G 304, H01B 902
Patent
active
045714509
ABSTRACT:
The present invention is a moisture impervious electrical power cable and conduit system. The conduit comprises a moisture impervious, electrically conducting inner layer, which acts as a concentric neutral for the cable, and an outer layer of an electrically insulating or semiconductive polymeric material. The cable, which comprises an insulated central core of electrically conductive material surrounded with a semiconductive polymeric material, is placed longitudinally inside the conduit and is in sufficient electrical contact with the inner layer to allow it to act as a concentric neutral. The cable in conduit article of this invention may then be placed in the ground and should the cable fail, said cable may be withdrawn from the conduit and a new cable drawn through the moisture impervious conduit, thereby eliminating the necessity of disinterring or replacing the entire electrical power line system.
REFERENCES:
patent: 2111229 (1938-03-01), Thompson
patent: 3132415 (1964-05-01), Johnson et al.
patent: 3202754 (1965-08-01), Ruch
patent: 3651244 (1972-03-01), Silver et al.
patent: 3719769 (1973-03-01), Miyauchi et al.
patent: 3876462 (1975-04-01), Carini et al.
Askin Laramie E.
Cohen Alan C.
Essex Group Inc.
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