Junction Box Gland Geometry for Watertight Service Cable Sealing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional junction box connectors fail to provide a watertight seal for non-standard shaped service entrance cables, leading to water ingress and potential damage to electrical systems and fire hazards.
Innovation Solution
A junction box connector with a gland featuring an irregularly shaped passage and corresponding lobes to match the cross-sectional shape of service entrance cables, combined with a central connector, lock ring, washer, and seal ring to create a watertight seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional glands are used with non-standard shaped service entrance cables, then the installation process requires modification of the gland using tools like drills or knives, but this results in haphazard modifications that do not create a watertight seal
Solution Approach 1:
The gland passage is designed with an irregular cross-sectional shape featuring multiple lobes that asymmetrically match the non-standard shape of service entrance cables. This asymmetric design eliminates the need for haphazard modifications while ensuring a precise watertight seal around the cable.
Solution Approach 2:
The gland incorporates localized sealing features including a seal ring positioned at the interface between the gland and connector housing, and a flared outer surface that contacts the cable jacket at specific locations. These localized quality enhancements ensure watertight sealing without requiring modification of the entire gland structure.
2Reliability
If junction boxes are placed in driest locations to prevent water ingress, then water damage is reduced, but such locations may not be easy to access and sometimes may not exist due to building location or weather conditions
Solution Approach 1:
The gland acts as an intermediary component between the service entrance cable and the junction box connector. It provides a watertight barrier that protects the junction box interior from water ingress, allowing the junction box to be installed in accessible locations without compromising protection from water damage.
3Adaptability or versatility
If conventional glands are modified to accommodate non-standard cable shapes, then cable installation becomes possible, but the modified glands do not create a watertight seal increasing potential for damage and fire
Solution Approach 1:
The gland passage features an irregular cross-sectional shape with multiple lobes that asymmetrically correspond to the non-standard shape of service entrance cables. This design provides both adaptability to accommodate various cable shapes and maintains watertight sealing integrity, eliminating fire hazards associated with water ingress.
Solution Approach 2:
The invention converts the previously harmful situation of cable shape mismatch into a benefit by designing the gland passage to positively match non-standard cable shapes. The irregular lobed structure that would have been considered a deviation from conventional design is now the key feature that enables both cable accommodation and watertight sealing.
Data Source
AI summary
A junction box connector is disclosed with a gland specially formed to provide a watertight seal for service entrance cables being passed through electrical junction box walls. The junction box connector includes a central connector and a hexagonal connector housing, with the central connector receiving and holding the gland when the hexagonal connector housing is threaded onto the central connector. The gland has an irregularly shaped passage formed to match the irregular cross-sectional shape of a service entrance cable. The matching of passage shape and cable shape allows the gland to provide a watertight seal around the service entrance cable and prevent water leakage into a junction box.