How to Choose the Right Cable Gland for Your Cable

Choosing the correct cable gland is essential for maintaining electrical safety, protecting cables from environmental damage, and ensuring a reliable connection. The wrong gland can lead to loose connections, moisture ingress, cable damage and premature failure.

1. Check the Cable Size

Start by checking the cable’s overall diameter, not just the conductor size. Select a gland whose clamping range matches the actual outer diameter of the cable.

2. Select the Correct Gland Material

Choose the material according to the application:

• Brass cable glands – suitable for general industrial applications.
• Nickel-plated brass – better corrosion resistance for demanding environments.
• Stainless steel – ideal for corrosive, marine, chemical and hygienic applications.
• Polyamide/nylon – lightweight and suitable for many indoor and general-purpose applications.

3. Consider the Environment

Ask where the cable will be installed:

Indoor → standard gland may be sufficient.
Outdoor → weather-resistant gland with appropriate IP protection.
Chemical plant → corrosion-resistant material.
Wet area → suitable sealing and IP rating.
Hazardous area → use the appropriate certified hazardous-area gland.

4. Check the Thread Type and Size

The gland thread must match the enclosure, junction box, panel or equipment entry. Common thread systems include Metric, PG, NPT and BSP, depending on the application and equipment.

5. Don’t Ignore Mechanical Protection

A good cable gland should provide proper strain relief and cable retention, preventing excessive pulling, twisting or bending forces from reaching the electrical termination.

6. Verify the Required IP Rating

For outdoor and industrial applications, check the required Ingress Protection (IP) rating. The gland, enclosure and cable entry should be selected as a complete system rather than independently.

The Simple Rule

Cable diameter + material + environment + thread + IP requirement + certification = Right Cable Gland

At CRYSTAL, we can help you select the appropriate cable gland based on your cable size, application, enclosure and operating environment.

Don’t select a cable gland by size alone — select it for the complete application.

Need help selecting the right gland? Send us your cable size and application for a customized recommendation.