Sealed Junction Device for Electrical Enclosures
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Solution Overview
Problem
The installation of electrical circuitry in building construction often requires creating openings in junction boxes, which can lead to air and water vapor passage, causing mold formation and is labor-intensive, as wires need to be routed and coupled through these boxes.
Innovation Solution
A junction device with a modular design that allows electrical conductors to be routed from a circuit breaker panel to individual junction boxes without breaking the enclosure's seal, using pass-throughs and wire covers to maintain a closed barrier against air and water vapor, and eliminating the need for wire stripping by using covers that automatically displace insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If openings are created in junction boxes for wire routing, then electrical connections can be established, but the enclosure's seal is broken allowing air and water vapor passage
Solution Approach 1:
The junction box is divided into functional segments: a sealed enclosure portion and a modular device portion. The modular device can be attached and detached without compromising the seal of the main enclosure, allowing wire routing operations while maintaining the barrier against air and water vapor.
Solution Approach 2:
A modular device portion acts as an intermediary between the sealed enclosure and the external wiring environment. This intermediate component provides the necessary openings and wire routing capabilities while isolating the main sealed enclosure from direct exposure to air and water vapor pathways.
2Ease of operation
If traditional wire routing methods are used through openings, then electrical connections can be made, but considerable labor time and expense are required
Solution Approach 1:
The modular device portion is pre-configured with wire routing pathways, insulation displacement connectors, and terminal connections before installation. This preliminary preparation eliminates the need for time-consuming on-site wire stripping, bending, and manual connection operations, significantly reducing installation time.
Solution Approach 2:
The insulation displacement connector automatically performs the wire stripping and connection function when the modular device is attached to the sealed enclosure. The system serves itself by integrating the connection mechanism into the attachment process, eliminating the need for separate manual wiring operations.
3Reliability
If the enclosure is kept sealed to prevent mold, then air and water vapor passage is blocked, but wire routing becomes difficult
Solution Approach 1:
The system separates the sealed enclosure from the wire routing interface by using a detachable modular device. This segmentation allows the main enclosure to remain completely sealed for mold prevention while the modular portion provides all necessary wire routing and connection functions externally.
Solution Approach 2:
The modular device serves as an intermediary interface that mediates between the sealed enclosure and external wiring requirements. It provides wire routing pathways and connection points without requiring openings in the sealed enclosure itself, thus maintaining seal integrity while enabling wire routing operations.
Data Source
AI summary
A junction device includes a junction device main portion configured for attachment to an electrical enclosure and a modular device portion electrically coupled to the junction device main portion and configured for electrical coupling to an inner junction of the electrical enclosure. At least one conductive pass-through electrically couples the inner junction of the electrical enclosure to an outer junction of the electrical enclosure. The outer junction is enclosed by an outer enclosure that is configured to engage the electrical enclosure thereby surrounding the outer junction to prevent degradation of a coupled external high-voltage conductor and to provide fire protection.