Plenum cable
US6392152B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 1996 |
| Grant date | May 21, 2002 |
| Priority date | — |
| Expiry date | Apr 30, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A30/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A communications cable having superior electrical characteristics and meeting the burn requirements for plenum applications has a core formed of one or more twisted wire pairs having primary insulation formed of a suitable material, such as high density polyethylene. The core is surrounded by an inner jacket formed of a low smoke, polyvinyl chloride material. As an alternative to or in addition to the inner jacket, the core may be surrounded by a core wrap having adequate electrical properties and burn/flame resistance properties. The inner jacket is surrounded by an outer jacket formed from a material having excellent heat/flame resistance characteristics but which may have less than optimal electrical characteristics, such as a thermoplastic halogenated polymer, for example polyvinylidine fluoride material. A plurality of cores surrounded by individual inner core wraps and/or inner jackets may be surrounded by the outer jacket.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.