Types of Cable Glands: A Comprehensive Overview

Cable glands, also known as cable connectors, play a crucial role in securing and sealing cables that pass through equipment, enclosures, or bulkheads. These devices are used in various industries to protect electrical systems from environmental factors like dust, water, and chemicals while providing strain relief. With different environments and applications requiring specific features, various types of cable glands are available. Below is a breakdown of the most common types of cable glands and their uses.

1. Armored Cable Glands

Armored cable glands are specifically designed for use with armored cables, which are often used in environments requiring extra protection against mechanical damage. These glands provide a secure seal and grip on both the inner and outer sheath of the cable, as well as the armor. They are widely used in industrial and hazardous areas where cables are exposed to harsh conditions.

• Common Applications: Oil and gas, mining, and heavy machinery.

2. Unarmored Cable Glands

Unarmored cable glands are designed for cables without an armor layer. These glands focus on sealing the cable while providing strain relief to prevent damage from mechanical stress. They are typically easier to install compared to armored cable glands and are used in less demanding environments.

• Common Applications: Telecommunications, data centers, and office installations.

3. Explosion-Proof Cable Glands

Explosion-proof, or Ex-proof cable glands, are designed for hazardous environments where explosive gases, dust, or vapors may be present. These glands are made to prevent any sparks or heat from escaping the enclosure, thus minimizing the risk of igniting an explosive atmosphere.

• Common Applications: Oil and gas platforms, chemical plants, and mining operations.

4. EMC Cable Glands

Electromagnetic Compatibility (EMC) cable glands are designed to protect sensitive equipment from electromagnetic interference (EMI). They have a specific construction that ensures a continuous conductive connection between the cable shield and the equipment, which is crucial in environments where electromagnetic interference can affect equipment performance.

• Common Applications: Telecommunications, aerospace, and high-frequency electronics.

5. Waterproof Cable Glands

Waterproof cable glands, also known as IP-rated cable glands, are designed to prevent the ingress of water and moisture. These glands are often used in outdoor installations where exposure to rain, humidity, or submersion in water is a concern. They are rated according to the Ingress Protection (IP) standard, with ratings like IP67 or IP68 indicating high levels of water resistance.

• Common Applications: Outdoor lighting, marine installations, and renewable energy projects.

6. Plastic Cable Glands

Plastic cable glands are lightweight and corrosion-resistant, making them suitable for applications where exposure to harsh chemicals or salty environments is likely. These glands are typically used in environments where electrical and mechanical requirements are not as stringent as in industrial settings.

• Common Applications: Home electronics, light industrial applications, and food processing facilities.

7. Metallic Cable Glands

Metallic cable glands, typically made from materials like brass, stainless steel, or aluminum, provide excellent mechanical strength and durability. These glands are highly resistant to corrosion, extreme temperatures, and mechanical wear. They are commonly used in industries where long-term durability is essential.

• Common Applications: Heavy industries, automotive, and marine applications.

8. Flexible Cable Glands

Flexible cable glands feature a flexible design that allows for better movement and bending of cables without damaging the connection point. They are particularly useful in dynamic environments where cables are subject to movement or vibration.

• Common Applications: Robotics, automation, and machinery.

9. PG Cable Glands

PG (Panzer-Gewinde) cable glands follow the PG thread standard. These glands are commonly used in Europe and are typically designed for light-duty applications. While less robust than other types, they are easy to install and suitable for everyday use.

• Common Applications: Electrical installations in buildings, HVAC systems, and domestic appliances.

10. Metric Cable Glands

Metric cable glands follow the metric thread standard and are widely used in a variety of industrial and commercial applications. They are available in both plastic and metal versions, offering flexibility in different types of installations.

• Common Applications: Electrical panels, machinery, and construction.

Conclusion

Choosing the right type of cable gland depends on the specific environment and the nature of the application. Whether it’s for hazardous areas, outdoor settings, or sensitive electronic systems, selecting the appropriate cable gland ensures safety, reliability, and long-term performance of electrical installations.

ential component in any electrical system installed in hazardous environments. By choosing certified, high-quality glands, companies can ensure compliance with international safety standards, protect their equipment from environmental risks, and most importantly, safeguard lives by reducing the potential for explosions.