Side Entry Circuit Breaker with Selective Cable Routing
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Solution Overview
Problem
Existing circuit breakers lack flexibility in cable routing, requiring U-bends or S-bends for cable clearance, limiting installation options and violating electrical code spacing requirements when left or right side cable routing is needed.
Innovation Solution
A circuit breaker design with non-conductive cavities on both sides of the housing allows for selective insertion of cables from either side, eliminating the need for complex bends and enabling vertical cable routing, while maintaining compliance with electrical code spacing requirements through adjustable lug orientations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If top-access circuit breaker design is used, then electrical code compliance is achieved, but cable routing flexibility deteriorates requiring U-bends or S-bends
Solution Approach 1:
The circuit breaker is divided into functionally independent left and right sides, each with its own non-conductive cavity and wiring connector. This segmentation allows cables to be routed independently from either the left or right side without interfering with the other side, eliminating the need for complex U-bends or S-bends while maintaining electrical code compliance through proper insulation spacing.
Solution Approach 2:
The patent transitions from a single top-access dimension to multi-dimensional side-access routing. By providing non-conductive cavities on both left and right sides, the design adds lateral routing dimensions, allowing cables to enter horizontally from either side rather than requiring vertical top-entry routing with complex bends.
2Ease of manufacture
If fixed lug orientation is used, then manufacturing simplicity is maintained, but installation adaptability deteriorates
Solution Approach 1:
The circuit breaker design provides universal functionality by equipping both left and right sides with identical non-conductive cavities and wiring connectors. This universal configuration allows the same device to accommodate various installation scenarios (left-side routing, right-side routing, or combination) without requiring different manufacturing variants, thus maintaining manufacturing simplicity while maximizing installation adaptability.
3Adaptability or versatility
If side-access lugs are implemented, then cable routing flexibility is improved, but electrical code compliance deteriorates due to spacing violations
Solution Approach 1:
Non-conductive cavities serve as intermediary structures between the external environment and the electrical components. These cavities provide the required electrical insulation and spacing to comply with electrical code over-surface requirements while still allowing side-access cable routing. The cavities act as mediators that enable flexible routing without compromising safety spacing.
Solution Approach 2:
The patent applies local quality by providing non-conductive cavities specifically at the cable entry points on the left and right sides. This localized insulation approach ensures electrical code compliance at the critical spacing locations where cables interface with the circuit breaker, while maintaining open access for routing flexibility without requiring complete enclosure of the entire device.
Data Source
AI summary
A circuit breaker enables selective left, right or a combination of both side connection to a power conductor, such as a cable or wire. Side connection eliminates the need for large radius U-bends of the power conductor that is normally required when using top connection circuit breakers. An electrically non-conductive cavity commonly defined by left and right sides of the circuit breaker housing receives the power conductor in a connector such as a lug. The circuit breaker may have a visualization window oriented to observe whether excessive cable is projecting out of the lug, so as to confirm compliance with electrical code over surface spacing requirements. In some embodiments, the circuit breaker lugs are vertically oriented above its front cover surface in a receptacle portion of the housing. The receptacle may be constructed for selective lug orientation in horizontal or vertical positions by the installer.