Are you confused about the differences between A1 and A2 cable glands? Not knowing the distinctions can lead to improper installations and compromised safety.

In this blog post, we’ll clarify the key differences between A1 and A2 cable glands, including sealing, compatibility, IP ratings, and suitable application environments. By understanding these distinctions, you can ensure you select the right gland for your specific needs.

What is A1 Cable Glands

A1 cable glands, also known as non-armored cable glands, are designed for use with non-armored cables. These glands provide strain relief and seal the cable entry point against ingress of dust, dirt, and liquids. A1 cable glands feature a sealing ring, compression ring, and locking nut that work together to securely hold the cable in place and protect against environmental factors.

What is A2 Cable Glands

A2 cable glands, or armored cable glands, are specifically engineered for use with steel wire armored (SWA) cables. The armor of SWA cables provides additional mechanical protection and is often required in harsh industrial environments. A2 cable glands incorporate features to securely terminate and earth the armor, in addition to providing strain relief and environmental sealing like their A1 counterparts.

Key Differences Between A1 and A2 Cable Glands

Sealing Methods

A1 glands rely on a rubber sealing ring that compresses around the outer sheath of the cable to form a tight seal.

A2 glands have an additional cone-shaped seal that grips the inner bedding of the armored cable, providing an extra layer of protection.

Cable Compatibility

A1 glands are suitable for non-armored cables, including unarmored, braided, and screened cables.

A2 glands are specifically made for SWA cables and are not compatible with non-armored varieties.

Ingress Protection (IP) Ratings

A1 glands commonly provide IP66, IP67, or IP68 protection, indicating high levels of dust and water resistance.

A2 glands often boast similar IP ratings but may have additional certifications for hazardous area use due to the nature of armored cable applications.

Typical Application Environments

A1 glands are widely used in general industrial, commercial, and infrastructure settings where non-armored cables are sufficient.

A2 glands are more commonly found in heavy industrial environments, such as oil and gas, mining, and chemical processing, where the added protection of armored cables is necessary to withstand harsh conditions.