Tamper-Resistant Receptacle With Segmented Contacts
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Solution Overview
Problem
Existing self-contained receptacles face issues with secure electrical connections, complex installation processes, limited compatibility with different types of cables, and lack of tamper-resistance, which can lead to hazardous situations, especially in environments with young children.
Innovation Solution
A tamper-resistant self-contained receptacle (TRSCR) with separate sets of contact screws for each cable, capable of connecting both metallic-clad and non-metallic sheathed cables, featuring a tamper-resistant cap and extended ground clip for improved safety and versatility, and a simplified mounting process that requires only a single bore hole.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If insulation displacement connection method is used, then installation is simplified, but electrical connection security deteriorates
Solution Approach 1:
The receptacle divides cable connections into separate sections with individual contact screws for each wire (hot, neutral, ground), allowing secure terminal screw connections while maintaining organized installation. Each cable has its own dedicated contact points rather than shared insulation displacement contacts.
2Reliability
If terminal screws are used for improved electrical connectivity, then connection security improves, but wiring complexity increases
Solution Approach 1:
The receptacle provides separate contact screws for each wire type (hot, neutral, ground) and for each cable entry, organizing the wiring process into clear, manageable sections. This segmented approach reduces wiring complexity despite using terminal screws.
3Device complexity
If a single screw is shared for entering and exiting wires, then device complexity is reduced, but wiring time increases
Solution Approach 1:
The receptacle provides separate contact screws for entering and exiting wires of each cable, allowing independent connection and adjustment. This eliminates the time-consuming process of arranging both wires around a single shared screw while maintaining a relatively simple overall device structure.
4Manufacturing precision
If receptacle requires two-step hole drilling, then mounting precision can be improved, but installation complexity increases
Solution Approach 1:
The receptacle is designed with a universal mounting system that can accommodate both one-step and two-step drilling methods, as well as different cable types (metal-clad and non-metallic sheathed). This multi-functional design simplifies installation by allowing installers to choose the simpler one-step method when possible.
5Ease of operation
If insulation displacement connection is used, then installation is easier, but cable rewiring becomes difficult
Solution Approach 1:
The receptacle uses separate terminal screws for each wire connection, allowing individual wires to be easily disconnected and reconnected without affecting other connections. This segmented approach makes cable rewiring straightforward while maintaining simple installation procedures.
6Device complexity
If receptacle is configured for only non-metallic sheathed cable, then device complexity is reduced, but adaptability deteriorates
Solution Approach 1:
The receptacle is designed with universal mounting and wiring features that accommodate both non-metallic sheathed cable and metal-clad cable, as well as different drilling methods. This multi-functional design expands adaptability without significantly increasing device complexity.
Data Source
AI summary
A tamper-resistant self-contained receptacle (TRSCR) provides two sets of contacts for connecting two separate cables in a daisy-chain configuration. A TRSCR is configured for insertion into a single bore hole and is compatible with both metal-clad (MC) and non-metal sheath (NMS) cable. A base providing two sets of contacts, each having hot, neutral and ground contacts, can couple to two doors so that each set is covered. A ground contact can include an extended clip for connection to the metal clad of an MC cable. A door can be configured to receive an MC cable or a NMS cable; or a universal door can be provided. Thus, a TRSCR is configured to provide a separate entry and a separate strain relief for each connected cable. A TRSCR can be coupled to a floor ring when installed in flooring, or an adapter collar when installed in a stone surface.