Metal-Clad Multi-Circuit Cable for Class 1 and Class 2/3 Routing
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Solution Overview
Problem
The existing methods for installing smart lighting and climate control systems in commercial buildings require separate cable runs for Class 1 and Class 2/3 circuits, leading to increased labor, material costs, and complexity due to the need for dual cable installations and additional permits.
Innovation Solution
A single, integrated multi-circuit electrical cable assembly that combines a Class 1-rated circuit for power supply and a Class 2/3-rated circuit for control signals, isolated by an insulating jacket and encased in a flexible conductive metallic armor to provide a ground path, reducing the need for separate cable installations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate cable runs are used for Class 1 and Class 2/3 circuits, then electrical safety and code compliance are ensured, but installation complexity and labor costs increase
Solution Approach 1:
The patent combines Class 1 and Class 2/3 circuits into a single multi-circuit cable assembly, merging previously separate cable installations into one integrated unit while maintaining code compliance through physical separation and insulation of the different circuit types
Solution Approach 2:
The cable assembly is designed to perform multiple functions simultaneously - carrying both Class 1 power circuits and Class 2/3 control circuits through a single cable structure, eliminating the need for separate cable runs for different circuit types
2Reliability
If separate cable runs are used for Class 1 and Class 2/3 circuits, then code compliance is maintained, but material costs and installation time increase
Solution Approach 1:
The patent merges separate Class 1 and Class 2/3 cable installations into a single multi-circuit cable assembly, reducing material costs by eliminating duplicate cable, fittings, and labor while maintaining code compliance through proper circuit separation and insulation within the assembly
3Reliability
If multiple separate cables are installed, then circuit isolation is ensured, but space utilization and aesthetic appearance deteriorate
Solution Approach 1:
The patent nests multiple circuits within a single cable assembly structure, with Class 1 and Class 2/3 circuits physically separated and insulated within the same outer sheath, achieving both circuit isolation and compact space utilization
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution simplifies the installation process, reduces material and labor costs, and results in a more aesthetically pleasing and space-efficient arrangement by carrying both power and control signals in a single cable assembly, enhancing the efficiency of energy management systems in commercial buildings.
Implementation Method 1
encased in a flexible conductive metallic armor to provide a ground path
Data Source
AI summary
An electrical cable assembly, comprising a first electrical circuit further comprising a first plurality of insulated conductors longitudinally disposed to one another, wherein the first plurality of insulated conductors are cabled together in a bundle. The electrical cable assembly further comprises a second electrical circuit longitudinally disposed to the first electrical circuit, the second electrical circuit comprising a second plurality of insulated conductors longitudinally disposed to one another and cabled together in a bundle and a nonmetallic jacket surrounding the second plurality of insulated conductors and wherein the nonmetallic jacket isolating the first electrical circuit from the second electrical circuit. The electrical cable assembly further comprises a flexible interlocking metallic armor encasing the first and second electrical circuits.