The provided documentation details the function and application of Myers Hubs, specifically in the context of connecting terminated power cables to junction boxes, particularly in environments where explosion-proof installations are critical. Taurus, the manufacturer referenced, recommends these hubs to facilitate quick and easy installation of cable terminators into junction boxes that may lack sufficient threading for direct attachment. The documentation focuses on the hub’s ability to create the necessary NPT thread depth in thin sheet metal panels.
Function of the Myers Hub
The primary function of a Myers Hub is to provide a secure and standardized connection point for electrical cable terminators within junction boxes. The documentation highlights its utility when connecting to non-explosion-proof sheet metal junction or power boxes. These boxes often lack the necessary internal threading to directly accommodate a cable terminator or gland. The Myers Hub addresses this issue by effectively creating the required NPT (National Pipe Thread) thread depth. This allows for a robust and reliable connection without the need for modifications to the junction box itself.
Installation Considerations
The documentation explicitly states that the Myers Hub is intended for installation into a junction box wall. The process involves providing a connection point for the terminated power end of a cable. The hub’s design simplifies this process, particularly in situations where the sheet metal of the junction box is too thin to be directly threaded. The documentation emphasizes the ease and speed of installation offered by the Myers Hub, suggesting it as a preferred method over alternative connection techniques.
Dimensional Compatibility
A key feature of the Myers Hub, as described in the documentation, is its dimensional flexibility. Taurus provides these hubs in various sizes designed to accommodate different cable gland and terminator dimensions. This ensures compatibility with a wide range of cable types and connection hardware. The documentation does not specify the range of available sizes, but it confirms that Taurus manufactures hubs tailored to specific cable gland/terminator requirements. This customization is crucial for maintaining the integrity of the electrical connection and ensuring compliance with safety standards.
Application in Hazardous Environments
While the documentation does not explicitly detail the specific hazardous environments for which the Myers Hub is suitable, the reference to explosion-proof installations strongly suggests its use in potentially dangerous locations. The need for a secure and reliable electrical connection is paramount in such environments to prevent sparks or electrical faults that could ignite flammable materials. The use of a Myers Hub, in conjunction with appropriate explosion-proof cable glands and terminators, contributes to the overall safety of the electrical system.
Benefits of Using a Myers Hub
The documentation highlights several benefits associated with using a Myers Hub:
- Simplified Installation: The hub streamlines the installation process, reducing the time and effort required to connect cables to junction boxes.
- Compatibility: The availability of hubs in various sizes ensures compatibility with a wide range of cable glands and terminators.
- Secure Connection: The creation of adequate NPT thread depth provides a robust and reliable connection, minimizing the risk of loosening or failure.
- Adaptability: The hub allows for the use of cable terminators in junction boxes that would otherwise be unsuitable for direct connection.
- Reduced Modification: The use of a Myers Hub eliminates the need to modify the junction box itself, preserving its structural integrity and original certification.
Technical Specifications (Based on Documentation)
The documentation provides limited technical specifications. The following points can be derived:
- Material: The documentation does not specify the material composition of the Myers Hub.
- Thread Type: The hub is designed to create NPT (National Pipe Thread) connections.
- Dimensional Range: Taurus provides hubs with dimensions to accommodate various cable gland/terminator sizes, but specific dimensions are not listed.
- Application: Primarily intended for use with non-explosion-proof sheet metal junction/power boxes.
- Manufacturer: Taurus.
Importance of NPT Threading
The documentation’s emphasis on NPT threading highlights its importance in creating a leak-proof and secure connection. NPT threads are tapered, meaning the diameter of the thread decreases along its length. When two NPT fittings are joined, the tapered threads create a tight seal when tightened with a wrench. This seal is often further enhanced with the use of thread sealant, such as Teflon tape, to prevent leakage of gases or liquids. In the context of electrical connections, a secure seal is crucial to prevent moisture ingress and maintain the integrity of the electrical insulation.
Considerations for Selecting a Myers Hub
Based on the provided documentation, the primary consideration for selecting a Myers Hub is ensuring dimensional compatibility with the cable gland or terminator being used. Users should verify that the hub’s internal dimensions are appropriate for the specific hardware to ensure a secure and reliable connection. While the documentation does not provide specific guidance on material selection, it is important to choose a hub that is compatible with the environmental conditions and the materials of the junction box and cable gland.
Future Developments (Based on Documentation)
The documentation does not provide any information regarding future developments or planned enhancements to the Myers Hub. However, it is reasonable to assume that Taurus may continue to refine the design and expand the range of available sizes to meet the evolving needs of its customers. Further research into Taurus’s product offerings may reveal additional information about future innovations.
Conclusion
The Myers Hub, as described by Taurus, is a practical solution for simplifying the installation of cable terminators into junction boxes, particularly those lacking sufficient threading. Its ability to create adequate NPT thread depth in thin sheet metal panels offers a secure, reliable, and efficient connection method. The hub’s dimensional compatibility and ease of installation make it a valuable tool for electricians and technicians working in a variety of applications, including potentially hazardous environments. The documentation underscores the importance of selecting the correct hub size to ensure a proper fit and a robust electrical connection.