Rooftop Junction Box Waterproofing via Flashing Member
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Solution Overview
Problem
Conventional rooftop junction boxes face issues with water permeation, aesthetic appeal, and high costs, lacking a reliable and economical solution that prevents water leakages and allows direct attachment to rooftops while maintaining stability and connectivity for various wiring systems.
Innovation Solution
A waterproof rooftop junction box design featuring a storage unit with screw hole channels, press fit flutes, and a locking mechanism, combined with sealing gaskets and washers, which securely attaches to a flashing member using threaded screw elements, ensuring water-tight protection and easy installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional junction boxes are installed on rooftops, then they provide basic electrical protection, but they suffer from water permeation through the periphery and lack reliable waterproofing
Solution Approach 1:
A flashing member is introduced as an intermediary component between the junction box and the rooftop. The flashing member extends beneath the rooftop surface and is secured with sealant, creating a waterproof barrier that prevents water permeation while allowing the junction box to be mounted above the roof surface.
Solution Approach 2:
The flashing member utilizes a flexible, thin-film structure that can be sealed against the rooftop surface using sealant. This flexible barrier effectively blocks water penetration paths while accommodating slight movements and irregularities in the roof surface.
2Ease of manufacture
If conventional junction boxes are used, then they provide basic electrical containment, but they lack aesthetic appeal and have bulky structures that increase cost
Solution Approach 1:
The junction box system is segmented into distinct functional components: a compact junction box for electrical containment, a separate flashing member for waterproofing, and mounting hardware. This segmentation allows each component to be optimized independently, reducing overall bulk while maintaining functionality.
Solution Approach 2:
The flashing member serves multiple functions simultaneously: it provides waterproofing, creates a mounting surface for the junction box, and ensures aesthetic integration with the rooftop. This multi-functionality eliminates the need for separate structural supports, reducing overall device complexity.
3Ease of operation
If simple mounting methods are used, then installation is easier, but the junction box lacks stability and reliability on the rooftop
Solution Approach 1:
The flashing member is pre-installed and secured to the rooftop with sealant before the junction box is mounted. This preliminary action creates a stable, waterproof base that simplifies subsequent junction box installation while ensuring long-term mounting stability and weather resistance.
Data Source
AI summary
A roof top junction box for direct attachment to a roof top, the box comprising a storage unit and an enclosure, the storage unit including an internal storage area, a plurality of screw holes, a plurality of screw hole channels, a plurality of press fit flutes, a plurality of threaded screw elements, a multithreaded flute, a bottom conduit port and a conduit fastening assembly; a mounting component in the internal storage area of the storage unit, the mounting component having at least one terminal component secured thereto; wherein at least two of the plurality of press fit flutes is aligned inside at least two of the plurality of screw hole channels, respectively; wherein the plurality of threaded screw elements is affixed to a flashing member attached to the roof top; and wherein a conduit is inserted through the bottom conduit port and connects to a wiring system within a building.