Adjustable Earthing Access Housing for Cast-In Concrete Testing
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Solution Overview
Problem
Existing electrical safety systems for conductive elements in concrete, such as reinforcing bars, are difficult to test after the concrete has cured, leading to costly and invasive inspection methods, especially in areas with finished surfaces like tiles or pavers.
Innovation Solution
An electrical safety system comprising a conductive coupler and an adjustable housing that can be cast into concrete, allowing for external access and easy testing of earthing connections, with features like a threaded bolt and clamp member for secure clamping and sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a thick copper wire is used to electrically connect reinforcing to reduce disconnection likelihood, then reliability of earthing connection is improved, but the system becomes difficult to test once concrete is poured and cured
Solution Approach 1:
The system divides the earthing connection into two separable parts: the conductive element embedded in concrete and the testable connector extending to the surface. This segmentation allows the embedded portion to remain reliable while the external portion enables easy testing.
Solution Approach 2:
The conductive connector acts as an intermediary between the embedded conductive element and the external testing equipment. It provides a reliable electrical connection while extending accessibility to the surface for non-invasive testing.
2Reliability
If Australian/New Zealand Standard 3000:2018 requires equipotential bonding conductor connection, then electrical safety is improved, but verification becomes costly and time consuming through destructive inspection
Solution Approach 1:
The system provides self-verification capability by incorporating external test points that enable users to test earthing connections without requiring destructive inspection or specialized equipment, making compliance verification simple and cost-effective.
3Reliability
If existing earth point systems are used in concrete, then earthing functionality is provided, but they are not suitable for tiled or paved surfaces and are relatively expensive
Solution Approach 1:
The conductive connector is designed with a universal external connector that can accommodate various finished surfaces including tiles, pavers, and concrete. The same basic design works across different application scenarios, reducing the need for specialized expensive systems.
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
Enables non-invasive and cost-effective testing of earthing connections, reducing inspection costs and improving electrical safety by allowing for easy identification of faults without damaging the structure.
Implementation Method 1
a conductive coupler, for coupling the electrical safety system to a conductive element
Data Source
AI summary
An electrical safety system is provided that includes a conductive coupler, for coupling the electrical safety system to a conductive element and be cast into concrete or similar material with the conductive element; and a housing, coupled to the conductive coupler, configured to be at least partially cast into the concrete or similar material to provide external access to the conductive coupler and thereby the conductive element. A length of the housing is adjustable after being cast into the concrete or similar material to enable the housing to sit flush with a finished surface of or associated with the concrete.