Modular Electrical Plug for Safe Wiring Device Connections
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Solution Overview
Problem
The installation and maintenance of electrical wiring devices are labor-intensive and often require skilled electricians, leading to high financial costs, and pose safety hazards due to the risk of live electrical components during the installation or maintenance process, especially when the power is not properly turned off.
Innovation Solution
A modular electrical wiring system that includes a wiring device with an external plug and a connector, allowing for easy connection and disconnection of electrical wires, reducing the need for skilled labor and ensuring safety by eliminating exposed live contacts through a secure coupling mechanism that provides an audible signal for proper alignment and connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional wiring installation methods are used, then electrical wiring devices can be installed and connected, but the installation process becomes labor-intensive requiring skilled electricians and exposes live contacts creating safety hazards
Solution Approach 1:
The invention divides the wiring device into two separate components: a fixed portion that remains mounted in the electrical box and an external plug that connects to it. This segmentation allows the fixed portion to maintain secure, isolated connections to live wires while the external plug provides a safe, user-friendly interface for device connection, eliminating the need for users to handle exposed live contacts.
Solution Approach 2:
The external plug acts as an intermediary component between the live electrical wiring and the end-use device. It provides a safe interface that mediates the connection, allowing electrical power to be transmitted while preventing direct exposure to live contacts. The plug includes insulated contact points and a protective housing that isolates users from hazardous electrical components.
2Productivity
If conventional wiring methods with exposed wire leads are used, then electrical connections can be made, but the process requires stripping wires and making twist-on connections which is time-consuming and requires skilled labor
Solution Approach 1:
The fixed portion of the wiring device is pre-assembled with all necessary electrical connections, wire strippings, and terminal attachments completed during the rough-in phase. This preliminary action eliminates the need for these complex preparation steps during the trim-out phase, allowing non-skilled workers to simply snap the external plug into place without handling tools or exposed wires.
Solution Approach 2:
The invention combines multiple complex steps (wire stripping, terminal attachment, connector assembly) into a single pre-assembled fixed portion unit. By merging these operations into one integrated component that is prepared in advance, the system eliminates the need for skilled labor during final installation, as the external plug requires only a simple snap-in connection.
3Reliability
If power is turned off during maintenance work, then safety is improved, but it is difficult to know which circuit breaker to turn off and proper procedures are not always followed
Solution Approach 1:
The invention extracts the hazardous live electrical contacts from the user-accessible portion of the device and relocates them to the fixed portion that remains mounted in the electrical box. This extraction allows the external plug and device to be safely removed and replaced without requiring power shutdown, as the live contacts are isolated in the fixed portion that stays connected to the electrical system.
Solution Approach 2:
The system enables self-service maintenance where users can safely replace devices without needing to identify or turn off circuit breakers. The external plug design with isolated contacts allows users to work on devices as if they were unplugged appliances, eliminating the need for users to understand or interact with the building's electrical distribution system.
Data Source
AI summary
The modular electrical wiring device includes an electrical wiring device and an external plug that is electrically coupled by one or more wires to the wiring device. The modular plug is releasably coupled to a connector in a male-female relationship. Both the modular plug and connector include internal contacts for electrically coupling one to the other. The connector is electrically coupled to and directly terminates one or more building wires, which are used to provide power to one or more of the wiring devices. The external plug is removably coupled to the connector to provide electrical power to the wiring device by establishing and electrical pathway from a source of electrical power, through the building wires, the connector and the modular plug to the wiring device.