Cable entry points require effective protection because they allow cables to pass through the walls of panels, junction boxes and machine enclosures. If an entry point is not secured properly, cable movement, dust, moisture and vibration can affect internal terminals and components.
Brass cable glands grip and support cables at these entry points. Their mechanical strength, dimensional stability and corrosion resistance make them suitable for industrial panels and machinery.
Dollex Control Panel Accessories manufactures panel accessories for electrical contractors, automation companies, OEMs and control panel builders. Selecting the correct gland requires more than matching it to the approximate cable diameter.
What Does a Brass Cable Gland Do?
A brass cable gland may perform several functions depending on its design:
- Secure the cable at the enclosure entry
- Reduce strain on internal terminals
- Support dust and moisture protection
- Prevent excessive cable twisting
- Clamp cable armour
- Support earthing continuity
- Maintain the enclosure’s ingress protection
The gland must match the cable construction and enclosure opening to perform these functions effectively.
Single-Compression Cable Glands
Single-compression glands secure the cable at one main compression point. They are generally used for indoor panels and controlled environments where exposure to moisture, dust or heavy vibration is limited.
They provide a practical solution for many standard installations, but the application conditions and required protection level must be assessed first.
Double-Compression Cable Glands
Double-compression glands grip the cable at two points and usually provide stronger sealing and mechanical support. They are commonly selected for outdoor panels, process plants, heavy machinery and vibration-prone applications.
Correct assembly is essential. A missing seal, loose component or incompatible cable size can reduce the effectiveness of even a high-quality gland.
Cable Gland Selection for Delhi’s Industrial Applications
Industrial facilities in Delhi use electrical panels for manufacturing, building automation, water management, material handling and other applications. The glands used in these panels may encounter high temperatures, dust and regular equipment vibration.
Before choosing a gland, confirm:
- Whether the cable is armoured or unarmoured
- The cable’s overall outside diameter
- The type and dimensions of the armour
- The enclosure entry-thread standard
- Indoor or outdoor installation
- The required ingress protection level
- Exposure to water, oil or chemicals
- Earthing and bonding requirements
- Any hazardous-area approval required
Metric, PG, BSP and NPT threads have different profiles. Similar-looking sizes should not be treated as interchangeable.
Armoured and Unarmoured Cable Glands
Armoured cables require glands designed to clamp the armour securely. Proper clamping improves mechanical retention and may contribute to electrical continuity, depending on the system design.
Unarmoured cables rely on compression seals to grip the outer sheath. Using the wrong gland type can leave the cable loose or prevent the enclosure from sealing properly.
Why Nickel-Plated Brass Is Commonly Used
Nickel plating provides added surface protection and a durable finish. Nickel-plated brass cable glands are widely used in control panels, telecom equipment, automation systems and industrial machinery.
For installations exposed to highly corrosive chemicals or specialised process conditions, material compatibility should still be evaluated carefully.
Installation Details That Matter
The enclosure hole should be correctly sized and free from burrs. Washers, locknuts and earth tags should be placed in their intended positions. The gland must compress the seal without crushing the cable sheath.
The cable should also be supported near the entry so that its entire weight does not rest on the gland. Correct gland selection and installation help maintain enclosure protection while reducing stress on internal electrical connections.
