What is a Cable Gland?

A cable gland is a terminating component that secures the entry point where a cable enters an enclosure, equipment, or machinery. It provides strain relief, sealing solutions, and protection against dust, moisture, and environmental elements. The entry point where a cable enters an installation is vulnerable, and cable glands seal this opening to prevent moisture and dust ingress. Cable glands are used in many industries, such as telecoms, power, lighting, and control applications, to maintain earth continuity, prevent corrosion, and ensure a safe and durable cable installation.

Definition and Purpose

Cable glands, or cable fittings, are mechanical cable entry devices that seal the opening where a cable enters an electrical installation, equipment, or enclosure. Their purpose is to provide strain relief so cables don’t come loose due to mechanical strain or tension. They also protect the electrical installation from outside influences such as dust, moisture, and other contaminants. By securing the feed-through of cables, cable glands play a crucial role in many industries, including industrial, commercial, and residential settings.

Technician installing cable glands in control box

Design and Construction

Cable glands are designed and constructed to meet specific requirements and standards depending on the application and environment. They come in many materials, including plastic, brass, stainless steel, and nylon, each with its own properties and benefits. For example, plastic cable glands are for universal purposes due to their lightweight and corrosion-resistant nature. Brass cable glands offer higher resistance to corrosion and mechanical strain, so they are ideal for power and industrial applications. Stainless steel cable glands are for heavy applications and harsh environments and offer superior corrosion resistance and durability.

Types of Cable Glands

Cable glands come in many forms to meet industry standards and applications. Some of the most common types are:

Armoured cable glands (BW, CW, and A2 types): For cables with metal armouring, providing mechanical retention and electrical continuity.
EMC cable glands: Shielding to prevent electromagnetic interference in sensitive equipment.
Standard industrial cable glands: For general-purpose applications requiring reliable sealing and strain relief.
NPT cable glands: Designed to NPT (National Pipe Thread) standards for North American systems.

Various types of brass and plastic cable glands

Cable Gland Accessories

A range of accessories are available to enhance cable gland performance and installation. These include:

Locknuts: Secure the gland to an enclosure or panel.
Washers: Sealing washers provide additional sealing and protection against dust and moisture.
Reducers & Adaptors: For different gland sizes and thread types.
Plugs: Seal unused cable entries to maintain ingress protection rating.
Gland Shrouds: Gland shrouds protect the gland and sealing components from damage.

Cable gland accessories such as locknuts, washers, and sealing rings

Choosing the Right Cable Gland

Selecting the right cable gland is crucial for a safe and reliable installation. Consider material, ingress protection rating, cable type, diameter, and environmental conditions to ensure durability and compliance.

Installation and Maintenance

Proper installation and maintenance ensure cable gland performance and lifespan. Follow manufacturer guidelines, tighten correctly, and check regularly for wear, corrosion, or loose fittings.

Applications of Cable Glands:

Telecoms: Data cables and connection integrity.
Industrial automation: Power and control cables in machinery.
Lighting: Cable connections in outdoor and indoor lighting systems.
Renewable energy: Electrical wiring in solar and wind installations.
Hazardous areas: Connections in explosive or flammable environments.

Cable glands are essential for ensuring safety, sealing, and longevity in electrical systems. For a full range of high-quality cable glands and accessories, visit Cable Glands UK.

Sales: info@accablesolutions.com
Orders: orders@accablesolutions.com
Accounts: accounts@accablesolutions.com
Purchasing: purchasing@accablesolutions.com

Websites: Cable Glands UK & AC Cable Solutions

Tel: 0161 874 1480

Written by Mitchell Leach.