(19)
(11) EP 0 727 790 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
22.10.1997 Bulletin 1997/43

(43) Date of publication A2:
21.08.1996 Bulletin 1996/34

(21) Application number: 96301008.7

(22) Date of filing: 14.02.1996
(51) International Patent Classification (IPC)6: H01B 7/18
(84) Designated Contracting States:
AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE

(30) Priority: 16.02.1995 GB 9503071

(71) Applicant: DELTA CROMPTON CABLES LIMITED
Derby DE21 4AE (GB)

(72) Inventors:
  • Vale, John P.
    Stalybridge, Cheshire SK15 3HX (GB)
  • Rodgers, Thomas
    Nr Selby, Yorks YO8 9QN (GB)

(74) Representative: Brereton, Paul Arthur 
REDDIE & GROSE 16 Theobalds Road
London WC1X 8PL
London WC1X 8PL (GB)

   


(54) Electric cable


(57) An electric cable 11 is manufactured by extruding a layer of electrically insulating material 13 around an electric conductor 12 to form an electrically insulated core. An intermediate layer of electrically insulating material 14 is then extruded around the core. Two such insulated cores with their intermediate layers 14 are laid up together a sheath 15 of electrically insulating material is extruded around the intermediate layers 14 and the insulated cores. The intermediate layer 14 is predominantly of a material which is incompatible with the material of the sheath so that the sheath does not form a bond with the intermediate layer and the sheath can easily be stripped away from the cores when preparing the ends of the cable for electrical connection to electrical components.
In other embodiments the intermediate layer is incompatible with the core insulation so that the intermediate layer comes away with the sheath when the sheath is stripped. The intermediate layer may also be extruded over the insulated cores after they have been laid up together.






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