Avoid These 5 Common Cable Gland Installation Mistakes

Cable glands may be small components, but they play a crucial role in maintaining the integrity and safety of electrical installations across various industries. When installed correctly, they provide strain relief, cable securing, and ingress protection against dust, moisture, and chemicals. However, mistakes in cable gland installation can compromise functionality, safety, and electromagnetic compatibility, leading to equipment failure or non-compliance with industry standards.

To help you achieve a secure connection and a proper installation, here are five common mistakes when installing cable glands and how to avoid them.

1. Choosing the Wrong Cable Gland for the Job

One of the biggest pitfalls is not choosing the right cable gland for your cable type, size, and environment. Using the wrong size or material can result in poor sealing, reduced strain relief, and even visible damage to the cable. For instance, using standard plastic glands in hazardous environments or selecting a gland with an incompatible IP rating may lead to leaks or early failure.

How to avoid it: Match the gland to the cable diameter, environmental conditions, and application requirements. Consider factors like exposure to moisture, dust, chemicals, and vibration. Whether you're dealing with armoured cable glands or plastic types, Cable Glands UK offers a full range of cable glands that meet all industry standards. Visit our website to find the ideal gland for your project.

2. Poor Cable Preparation and Assembly Errors

Even the correct gland will fail without proper installation. Common errors include improper cable strip lengths, damaging conductors, or skipping essential assembly components like sealing rings or clamps. Failing to prepare the cable correctly can leave the sealing area compromised or the cable not securely held.

How to avoid it:

Prepare the cable according to manufacturer specs—strip the sheath to the correct length, insert it fully, and inspect for a proper seal. Use the right tools and follow the assembly steps to ensure the integrity of the installation.

Don't forget to verify that the gland grips the cable and seals properly. For reference, visit our for step-by-step support.

3. Incorrect Tightening Torque

Both over-tightening and under-tightening can jeopardise the secure and reliable connection. Over-tightening can crush insulation and damage the cable, while under-tightening leaves gaps in the seal.

How to avoid it: Use a torque spanner and tighten to the manufacturer's recommendation. Always ensure the cable is securely held and the seal is compressed. This ensures the gland maintains the functionality and integrity of the electrical systems. Learn more about best practices in our installation accessories section.

4. Neglecting Earth Continuity on Armoured Cables

When using armoured cable, skipping the earth continuity process can create safety hazards. Armoured cable glands are designed to bond the armour to the enclosure, maintaining electrical systems integrity.

How to avoid it: Use the gland’s internal components to properly clamp the armour and connect an earth continuity device. This is vital for safety, especially in hazardous environments. For armoured applications, browse our dedicated armoured cable glands category.

5. Forgetting Environmental Sealing Accessories

Glands rated for IP66, IP67, or IP68 may still fail if installed without washers, gaskets, or seals. For example, installing a gland into a painted enclosure surface without a washer can compromise the seal.

How to avoid it:

Always use sealing washers or O-rings for a proper seal.

In cases where thread compatibility is an issue, use adaptors to suit different installation needs. Make sure all cable entries are sealed to maintain ingress protection and protect cables from moisture, dust, and other contaminants. You can find all required gland accessories on our site.

Conclusion

Understanding cable glands and avoiding these mistakes ensures long-lasting performance in various applications. Whether you're working on industrial electrical installations or commercial projects, correct gland installation will protect cables, maintain system integrity, and reduce downtime. Cable Glands UK offers expert advice and a full range of glands and accessories to suit any requirement.

For more guidance, reach out to our team for support on 0161871480. We’re here to help you achieve an easy installation that meets your site’s demands—because a secure gland means a safer connection.