Hybrid Cable Assembly with Nylon Jacket and Fiberglass Wrap
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Solution Overview
Problem
Current electrical installations require separate cables for Tray Cable (TC) and Service Entrance Cable (SE-R Cable) to comply with UL 1277 and UL 854 standards, leading to increased costs and complexity due to different construction requirements, including moisture ratings and infrastructure needs.
Innovation Solution
A hybrid SE-R/TC Cable is developed with an outer jacket suitable for direct burial and a fiberglass wrap, allowing it to meet both UL 1277 and UL 854 standards, enabling single cable installation in various applications without additional infrastructure, including underground and indoor/outdoor use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate TC and SE-R cables are used to comply with UL 1277 and UL 854 standards, then each cable meets its specific construction requirements, but the overall system complexity and cost increase due to maintaining multiple cable types
Solution Approach 1:
The patent combines the construction features of TC cable (robust outer jacket for direct burial) and SE-R cable (fiberglass wrap for moisture protection) into a single hybrid cable that meets both UL 1277 and UL 854 standards. This merging eliminates the need to maintain separate cable inventories and reduces installation complexity while maintaining compliance with both standards.
Solution Approach 2:
The hybrid cable is designed to serve multiple functions and comply with multiple standards simultaneously. It can be installed in direct burial applications (TC requirement), in cable trays without raceways (TC requirement), and as Service Entrance cable (SE-R requirement), making it a universal solution that replaces multiple specialized cables.
2Reliability
If multiple cable types are maintained at the jobsite, then compliance with different standards is achieved, but inventory management complexity and project costs increase
Solution Approach 1:
The hybrid cable serves as a universal cable type that can replace both TC and SE-R cables in various applications. By designing a single cable that meets both UL 1277 and UL 854 standards, the patent simplifies inventory management to a single cable type while maintaining the ability to comply with different installation standards and locations.
3Ease of operation
If TC cable is used in locations requiring SE-R cable, then infrastructure requirements are reduced, but code compliance is violated
Solution Approach 1:
The hybrid cable is designed with the robust outer jacket of TC cable allowing installation without raceways or cable trays, while incorporating the fiberglass wrap of SE-R cable to meet moisture protection requirements. This dual-feature design allows the single cable type to be installed in both TC-permitted and SE-R-permitted locations, maintaining code compliance while maximizing installation flexibility.
Data Source
AI summary
A wire cable comprising a ground conductor and an insulated conductor wherein the insulated conductor comprises a metal conductor, an insulated material surrounding the metal conductor, and a nylon jacket surrounding the insulated material. A binder surrounds the ground conductor and the insulated conductor and a jacket surrounds the binder.