Dedicated Grounding Conductor for Electrical Device Chassis
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Solution Overview
Problem
Electrical devices and connected components are vulnerable to power surges due to their connection to external power sources, and existing grounding methods using a ground prong may not meet electrical codes, posing risks of damage or fire.
Innovation Solution
A dedicated listed grounding conductor that permanently connects to the electrical device's chassis and a grounded receptacle, using a terminal lug for secure attachment to the device and a screw retaining ring for secure attachment to the receptacle, ensuring a reliable and code-compliant grounding solution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a ground prong is used for grounding, then the device can be connected to power source, but the grounding may not meet electrical codes and poses fire risks
Solution Approach 1:
The grounding system is segmented into distinct components: a grounding conductor separate from the power cord, a terminal lug for device connection, and a screw retaining ring for receptacle mounting. This segmentation allows each component to be optimized for its specific function and ensures code-compliant grounding separate from the power delivery path.
Solution Approach 2:
The grounding conductor acts as an intermediary element between the device chassis and the grounded receptacle. It provides a dedicated grounding path that mediates the connection safely, ensuring code compliance and eliminating the fire risk associated with improper ground prong usage.
2Reliability
If a permanent connection is made to chassis and receptacle, then grounding reliability is improved, but installation complexity increases
Solution Approach 1:
The grounding conductor is pre-assembled with the terminal lug and screw retaining ring attached before installation. This preliminary preparation simplifies the installation process by reducing the number of separate components that need to be handled and assembled during installation, while still achieving a permanent and reliable grounding connection.
Solution Approach 2:
Multiple grounding components (conductor, terminal lug, screw retaining ring) are merged into a single integrated grounding assembly. This combination maintains the permanent connection requirement for reliability while simplifying installation by treating the entire assembly as one unit that can be installed in fewer steps.
Data Source
AI summary
An electrical device and/or a connected component is grounded utilizing a dedicated listed grounding conductor that permanently connects to a chassis of the electrical device and a grounded receptacle. The grounding conductor is dedicated to and listed for grounding the electrical device and/or connected components. The grounding conductor includes a first portion that is permanently connectible to a chassis of the electrical device, a second portion that is permanently connectible to the grounding receptacle, and a conductor portion that connects the first portion and second portion. In some implementations, the first portion may include a terminal lug that connects to a port of the chassis and may be secured by a nut that may require mechanical assistance to remove. In various implementations, the second portion may include a ring that is operable to receive a screw that mates with a screw hole of the grounding receptacle.