Method of manufacturing THHN electrical cable, and resulting product, with reduced required installation pulling force
US7749024B2 · kind B2 · utility
71Cited by
82References
15Claims
0Family size
Assignee
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Key dates
| Filing date | Feb 15, 2007 |
| Grant date | Jul 6, 2010 |
| Priority date | — |
| Expiry date | Feb 15, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49117
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Disclosed is type THHN cable having a reduced surface coefficient of friction, and the method of manufacture thereof, in which the central conductor core and insulating layer are surrounded by a nylon sheath. A high viscosity, high molecular weight silicone based pulling lubricant for THHN cable, or alternatively, erucamide or stearyl erucamide for small THHN gauge wire, is incorporated, by alternate methods, with the nylon material from which the outer sheath is extruded, and is effective to reduce the required pulling force on the cable during installation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.