External Fastener Housing for Code-Compliant Electrical Boxes
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Solution Overview
Problem
Existing electrical box fastening methods often compromise installation safety, volumetric capacity, and compliance with electrical codes due to protruding fasteners and complex installation processes, particularly in new and old construction settings.
Innovation Solution
The design features externally situated fastener housings that allow fasteners to be driven from the box's front open face into framing, keeping them separate from the interior and eliminating the need for supplemental components, while maintaining the box's volumetric capacity and ensuring compliance with safety codes like National Electrical Code 314.23(b)(1).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fasteners are driven through the box body interior, then fastening capability is achieved, but fastener heads protrude into the box interior compromising safety and compliance
Solution Approach 1:
The patent relocates the fastener housing from the interior to the exterior of the box body, changing the spatial dimension of fastener installation. Fasteners are now driven from the front face through the exterior housing rather than through the interior, preventing protrusion into the box interior while maintaining secure attachment to framing members.
Solution Approach 2:
The fastening system is segmented into separate components: an exterior fastener housing positioned outside the box body, a fastener driven through the front face, and the box body itself. This segmentation allows the fastener head to reside in the exterior housing rather than protruding into the interior, resolving the safety and compliance issue.
2Reliability
If externally situated fastener housings are added, then fastening capability and safety are improved, but device complexity increases
Solution Approach 1:
The exterior fastener housing is integrated with the box body as a unified structure, where the housing forms an inherent part of the box assembly. This merging approach allows the fastening function to be enhanced without requiring completely separate supplemental components, thereby limiting the increase in device complexity.
3Reliability
If fastener housing is placed external to box body, then safety and code compliance are improved, but manufacturing complexity may increase
Solution Approach 1:
The exterior fastener housing is designed to accommodate various fastener types and box configurations, providing a universal solution that can be applied across different electrical box designs. This multi-functionality allows a single housing design to serve multiple purposes, simplifying the manufacturing process by reducing the need for specialized components for each box type.
Data Source
AI summary
An electrical box which utilizes fastening devices to provide improved box fastening to wall assembly materials with common fasteners. The electrical box possesses one or a plurality of externally situated fastener housings each with characteristics that support fastener placement, guide fastener insertion, limit fastener travel and house the fastener, once fully driven, outside of the box body interior. The externally situated fastener housing's placement outside of the box body allows for fastener insertion from the box body interior while not diminishing volumetric capacity of the box body. Alternative embodiments include round enclosure and bottom mount versions.