Grounding Fitting with O-Ring Seal for Conduit Attachment
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Solution Overview
Problem
Existing grounding fittings fail to securely fasten rigid conduits or EMT conduits to ground electrodes or rods in an inexpensive and reliable manner, and lack a mechanical seal to prevent fluid ingress into electrical enclosures.
Innovation Solution
A grounding fitting with an elongated body featuring a cylindrically shaped section and a hub section, incorporating passageways and threaded apertures for secure attachment of ground electrodes and rigid conduits, along with an O-ring and locking ring for a fluid-resistant seal, constructed from electrically conductive materials like aluminum or copper.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If prior art grounding fittings are used to attach to rigid conduit or EMT conduit, then some attachment is provided, but the conduit is not securely fastened in an inexpensive and reliable fashion
Solution Approach 1:
The grounding fitting is divided into distinct functional sections: a body portion for receiving the ground electrode, a hub section for securing the rigid conduit, a flange for mounting to the electrical enclosure, and various apertures for fastening. This segmentation allows each section to be optimized for its specific function, achieving reliable conduit attachment without excessive overall complexity.
Solution Approach 2:
The invention combines multiple functions into a single grounding fitting: grounding electrode reception, rigid conduit attachment, electrical enclosure mounting, and fluid sealing. By merging these functions into one integrated component, the fitting achieves reliable conduit fastening while avoiding the complexity of multiple separate devices.
2Reliability
If prior art grounding fittings are used, then grounding connection is provided, but no mechanical seal exists to prevent fluid ingress into electrical enclosures
Solution Approach 1:
An O-ring seal acts as an intermediary element between the flange and the electrical enclosure knockout hole. This simple rubber or elastomeric component provides effective fluid sealing without complicating the manufacturing process, as O-rings are standard, easily manufactured parts that can be compressed into the circular recess during assembly.
Solution Approach 2:
The O-ring seal is a flexible elastomeric ring that compresses against the flange and knockout hole surfaces to create a fluid-tight barrier. This flexible sealing approach provides reliable fluid protection while maintaining ease of manufacture, as the flexible material conforms to surface variations and can be easily installed.
3Object-affected harmful factors
If a grounding fitting is installed through a knockout hole, then grounding connection is achieved, but no fluid resistant barrier is formed between outside and inside of enclosure
Solution Approach 1:
The circular recess for the O-ring seal is pre-formed in the flange during manufacturing, positioning the sealing element in advance before installation. This preliminary preparation ensures that the fluid resistant barrier is automatically formed when the flange is mounted against the knockout hole, providing protection against fluid ingress without adding installation complexity.
Solution Approach 2:
The O-ring seal serves as an intermediary sealing element that fills the interface between the rigid flange and the knockout hole opening. This simple elastomeric mediator creates an effective fluid barrier while keeping the overall sealing mechanism simple and easy to install.
Data Source
AI summary
A grounding fitting for mounted engagement with an electrical enclosure has an elongated body with a first generally cylindrically shaped section and a hub section. Both sections have a longitudinally extending passageway dimensioned for passage of a ground electrode/ground rod. The first section includes a threaded aperture for receipt of a screw to electrically and mechanically secure a ground electrode/ground rod to the grounding fitting. The hub section is also dimensioned to secure a rigid or EMT conduit thereto. The first section includes a flange at one end with associated threads formed in the outer surface of the first section to mechanically and electrically secure the grounding fitting to an electrical enclosure with a locking ring. An O-ring positioned in the flange provides a fluid resistant barrier relative to the interior of the electrical enclosure.