Method for installing cable using an inner duct

Details Method for installing cable using an inner duct Method for installing cable using an inner duct

B - Operations, Transporting

65

H

26/129, 189/16

B65H 59/00 (2006.01) G02B 6/44 (2006.01) H02G 1/08 (2006.01)

Patent

CA 1243965

METHOD FOR INSTALLING CABLE USING AN INNER DUCT ABSTRACT OF THE DISCLOSURE An inner duct is disclosed which can fit inside a duct and extend along a length thereof for receiving communica- tion cable, particularly a light-guide cable. The inner duct has a continuous side wall with protruding ribs on the inside and outside surface to maintain an effective supply of lubri- cant during the installation of the inner duct and cable in the inner duct. The ribs on the inside surface of the inner duct guide the cable during the placement operation. It is pre- ferred to install a plurality of inner ducts into a duct during which the ribs on the inner duct interlock with one another to prevent spiraling. The ribs also facilitate the dissipation heat due to friction and ambient sources of heat.

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