Browse Prior Art Database

Plenum Cable

IP.com Disclosure Number: IPCOM000062252D
Original Publication Date: 1986-Oct-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Grune, GL: AUTHOR [+3]

Abstract

This article describes a structure for a relatively low cost plenum cable having a core formed from foamed polyethylene material. The polyethylene material is tightly wound with dual spiral wrapped Teflon impregnated glass tape. The construction is such that the flame associated with the UL 910 test is kept away from the foamed polyethylene fuel source and as a result the cable successively passes the UL Steiner Tunnel Test (UL 910).

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Plenum Cable

This article describes a structure for a relatively low cost plenum cable having a core formed from foamed polyethylene material. The polyethylene material is tightly wound with dual spiral wrapped Teflon impregnated glass tape. The construction is such that the flame associated with the UL 910 test is kept away from the foamed polyethylene fuel source and as a result the cable successively passes the UL Steiner Tunnel Test (UL 910).

The accompanying drawing shows a cross-section of the cable. The cable includes two pairs of copper conductors (wire) 10 with each pair being encased in a layer of foamed polyethylene material. Each pair is wound with dual wrapped or two layer glass impregnated tape 11. Preferably, each layer of tape is wound in opposite directions. For example, if the layer of tape next to the foamed polyurethane coating is wound in a clockwise direction, then the layer of tape sitting on the first layer should be wound in the counter-clockwise direction and vice versa. A metallic shielding material 12 is next disposed around the copper wire assemblies and a low smoke fluoro polymer material 14 is used to form the outside jacket of the cable.

Disclosed anonymously.

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