Selecting the correct cable gland size is one of the most important steps in ensuring safe, reliable, and efficient electrical installation. Whether you are working on solar projects, industrial panels, EV infrastructure, wind turbines, or commercial wiring, using the right gland guarantees secure cable entry, proper sealing, and long-term protection.
In this guide, we’ll help you understand what is a cable gland, how electrical cable size and gland size are related, and how to select the perfect gland using a simple cable gland size calculator approach. We’ll also cover type of cable glands, electrical cable gland types, and downloadable electrical cable gland size chart PDF options.
What is a Cable Gland?
A cable gland is a mechanical device used to securely terminate, seal, and protect cables entering electrical equipment. It ensures:
-
Mechanical strain relief
-
Protection against dust, moisture, chemicals, and vibration
-
Electrical continuity for armoured cables
-
Safety in hazardous or explosive zones
Cable glands are used in inverters, junction boxes, battery storage units, distribution boards, motors, and industrial control panels. They come in various materials brass, stainless steel, aluminium, and nylon depending on the environment.
Why Correct Cable Gland Size Matters?
Choosing the wrong gland size can lead to:
-
Loose fitting and cable pull-out
-
Water or dust ingress
-
Poor sealing in outdoor installations
-
Fire hazards in high-current applications
-
Failure in ATEX-rated or hazardous zones
This is why professionals always refer to a cable gland size calculator or a detailed size chart before installation.
Cable Gland Size Calculator
ARMOURED CABLE GLAND
| Cable Size (mm²) | No. of Cores | Approx. Min Bedding (mm) | Approx. Max Bedding (mm) | E1FW Gland Size |
|---|---|---|---|---|
| 1.0 | 2 | 8.0 | 9.5 | E1FW#16;20S16 |
| 1.0 | 3 | 9.1 | 9.6 | E1FW#16;20S16 |
| 1.0 | 4 | 9.5 | 10.4 | E1FW#20S |
| 1.0 | 7 | 10.2 | 10.5 | E1FW#20S |
| 1.0 | 12 | 13.0 | 13.5 | E1FW#20L |
| 1.0 | 19 | 15.6 | 16.0 | E1FW#25S;25L |
| 1.0 | 27 | 20.0 | 20.5 | E1FW#32 |
| 1.0 | 37 | 22.0 | 23.0 | E1FW#32 |
| 1.5 | 2 | 7.3 | 9.1 | E1FW#16;20S16 |
| 1.5 | 3 | 7.8 | 9.9 | E1FW#16;20S16 |
| 1.5 | 4 | 8.5 | 10.9 | E1FW#20S |
| 1.5 | 5 | 9.7 | 12.3 | E1FW#20L |
| 1.5 | 7 | 10.0 | 14.2 | E1FW#25S;25L |
| 1.5 | 8 | 12.6 | 15.2 | E1FW#25S;25L |
| 1.5 | 10 | 14.8 | 15.4 | E1FW#25S;25L |
| 1.5 | 12 | 13.7 | 15.8 | E1FW#25S;25L |
| 1.5 | 14 | 16.2 | 17.6 | E1FW#25S;25L |
| 1.5 | 19 | 16.2 | 20.5 | E1FW#32 |
| 1.5 | 24 | 21.7 | 22.4 | E1FW#32 |
| 1.5 | 27 | 20.0 | 22.9 | E1FW#32 |
| 1.5 | 30 | 23.7 | 23.9 | E1FW#32 |
| 1.5 | 37 | 22.3 | 26.7 | E1FW#40 |
| 2.5 | 2 | 8.5 | 9.0 | E1FW#16;20S16 |
| 2.5 | 3 | 9.2 | 10.0 | E1FW#20S |
| 2.5 | 4 | 9.9 | 10.6 | E1FW#20S |
| 2.5 | 5 | 11.5 | 13.0 | E1FW#20L |
| 2.5 | 7 | 11.0 | 13.0 | E1FW#20L |
| 2.5 | 8 | 12.0 | 13.0 | E1FW#20L |
| 2.5 | 10 | 16.0 | 16.6 | E1FW#25S;25L |
| 2.5 | 12 | 16.3 | 18.1 | E1FW#25S;25L |
| 2.5 | 14 | 18.0 | 19.0 | E1FW#25S;25L |
| 2.5 | 19 | 19.9 | 21.4 | E1FW#32 |
| 2.5 | 24 | 24.7 | 25.1 | E1FW#32 |
| 2.5 | 27 | 24.0 | 25.7 | E1FW#32 |
| 2.5 | 30 | 26.0 | 26.6 | E1FW#40 |
| 2.5 | 37 | 26.9 | 29.4 | E1FW#40 |
| 4 | 2 | 9.4 | 11.0 | E1FW#20S |
| 4 | 3 | 10.0 | 11.5 | E1FW#20S |
| 4 | 4 | 11.0 | 12.5 | E1FW#20L |
| 4 | 5 | 13.0 | 14.5 | E1FW#25S;25L |
| 4 | 7 | 12.0 | 15.0 | E1FW#25S;25L |
| 4 | 8 | 17.3 | 18.1 | E1FW#25S;25L |
| 4 | 10 | 19.7 | 20.2 | E1FW#32 |
| 4 | 12 | 20.4 | 21.0 | E1FW#32 |
| 4 | 14 | 22.0 | 22.8 | E1FW#32 |
| 4 | 19 | 24.9 | 25.0 | E1FW#32 |
| 6 | 2 | 10.5 | 12.0 | E1FW#20S |
| 6 | 3 | 11.2 | 13.0 | E1FW#20L |
| 6 | 4 | 12.3 | 14.0 | E1FW#25S;25L |
| 6 | 5 | 14.5 | 16.0 | E1FW#25S;25L |
| 6 | 7 | 13.5 | 17.5 | E1FW#25S;25L |
UNARMOURED CABLE GLAND
| Cable Size (mm²) | No. of Cores | Approx. Min Cable (mm) | Approx. Max Cable (mm) | A2F Gland Size | SCU / SCUB / DCU / DCUB |
|---|---|---|---|---|---|
| 0.5 | 2 | 5.2 | 6.2 | A2F#16; A2F20S | 16; 20; 20I |
| 0.5 | 3 | 5.5 | 6.3 | A2F#16; A2F20S | 16; 20; 20I |
| 0.5 | 4 | 5.7 | 6.0 | A2F#16; A2F20S | 16; 20; 20I |
| 0.75 | 2 | 6.2 | 6.4 | A2F#16; A2F20S | 16; 20; 20I |
| 0.75 | 3 | 6.1 | 7.1 | A2F#16; A2F20S | 16; 20; 20I |
| 0.75 | 4 | 7.2 | 7.8 | A2F#16; A2F20S | 16; 20; 20I |
| 0.75 | 7 | 8.0 | 8.7 | A2F#16; A2F20S; A2F#20L | 16; 20; 20I |
| 1.0 | 2 | 6.6 | 8.9 | A2F#16; A2F20S; A2F#20L | 16; 20; 20I |
| 1.0 | 3 | 7.0 | 9.6 | A2F#16; A2F20S; A2F#20L | 16; 20; 20I; 25 |
| 1.0 | 4 | 8.0 | 10.6 | A2F#16; A2F20S; A2F#20L | 16; 20; 20I; 25 |
| 1.0 | 7 | 8.5 | 9.3 | A2F#16; A2F20S; A2F#20L | 20; 20I; 25 |
| 1.5 | 2 | 7.8 | 10.0 | A2F#16; A2F20S; A2F#20L | 16; 20; 20I; 25 |
| 1.5 | 3 | 8.3 | 10.7 | A2F#16; A2F20S; A2F#20L | 20; 20I; 25 |
| 1.5 | 4 | 9.3 | 11.7 | A2F#16; A2F20S; A2F#20L | 20; 20I; 25 |
| 1.5 | 5 | 10.0 | 13.0 | A2F#16; A2F20S; A2F#20L; A2F#25 | 20; 20I; 25 |
| 1.5 | 7 | 10.9 | 15.4 | A2F#20L; A2F#25 | 20; 20I; 25; 32 |
| 1.5 | 8 | 15.4 | 15.8 | A2F#25 | 25; 32 |
| 1.5 | 10 | 15.8 | 19.4 | A2F#25; A2F#32 | 25; 32 |
| 1.5 | 12 | 19.5 | 20.1 | A2F#25; A2F#32 | 32; 40; 50 |
| 1.5 | 14 | 20.1 | 22.0 | A2F#32 | 40; 50 |
| 1.5 | 19 | 23.1 | 23.6 | A2F#32 | 40; 50 |
| 1.5 | 24 | 27.0 | 27.5 | A2F#40 | 40; 50 |
| 1.5 | 27 | 27.5 | 30.0 | A2F#40; A2F#50S | 40; 50 |
| 1.5 | 30 | 30.0 | 30.5 | A2F#40; A2F#50S | 50 |
| 1.5 | 37 | 30.6 | 31.5 | A2F#40; A2F#50S | 50 |
| 2.5 | 2 | 9.6 | 11.7 | A2F#16; A2F20S; A2F#20L | 20; 20L; 25 |
| 2.5 | 3 | 10.3 | 12.5 | A2F#16; A2F20S; A2F#20L; A2F#25 | 20; 20L; 25 |
| 2.5 | 4 | 11.9 | 13.8 | A2F#20L; A2F#25 | 20; 20L; 25 |
| 2.5 | 5 | 12.2 | 15.3 | A2F#20L; A2F#25 | 20L; 25; 32 |
| 2.5 | 7 | 13.2 | 17.8 | A2F#25 | 25; 32 |
| 2.5 | 8 | 17.8 | 19.0 | A2F#25; A2F#32 | 32 |
| 2.5 | 10 | 19.1 | 23.0 | A2F#25; A2F#32 | 32; 40; 50 |
| 2.5 | 12 | 23.1 | 23.3 | A2F#32 | 40; 50 |
| 2.5 | 14 | 23.3 | 26.8 | A2F#32; A2F#40 | 40; 50 |
| 2.5 | 19 | 26.9 | 27.5 | A2F#40 | 40; 50 |
| 2.5 | 24 | 31.8 | 32.4 | A2F#40; A2F#50S | 50 |
| 2.5 | 27 | 32.4 | 33.0 | A2F#50S | 50 |
| 2.5 | 30 | 33.0 | 36.0 | A2F#50S | 50; 63 |
| 2.5 | 37 | 36.8 | 37.2 | A2F#50S | 63 |
| 4 | 2 | 11.0 | 13.6 | A2F#20L; A2F#25 | 20; 20L; 25 |
| 4 | 3 | 11.4 | 14.6 | A2F#20L; A2F#25 | 20; 20L; 25 |
| 4 | 4 | 13.5 | 16.1 | A2F#20L; A2F#25 | 20L; 25; 32 |
| 4 | 5 | 14.1 | 18.1 | A2F#25 | 25; 32 |
| 4 | 7 | 20.5 | 20.9 | A2F#32 | 32; 40; 50 |
| 4 | 8 | 20.8 | 21.2 | A2F#32 | 40; 50 |
| 4 | 10 | 21.2 | 26.3 | A2F#32; A2F#40 | 40; 50 |
| 4 | 12 | 27.0 | 27.8 | A2F#40 | 40; 50 |
| 4 | 14 | 27.5 | 28.0 | A2F#40 | 40; 50 |
| 4 | 19 | 28.0 | 28.5 | A2F#40 | 40; 50 |
Cable Gland Size Chart PDF
Engineers and electricians often prefer using an Electrical Cable Gland Size Chart PDF because it provides a quick, reliable, and offline reference during:
-
Site inspections
-
Quick installation checks
-
Project planning & design
-
Procurement and material selection
A complete size chart PDF typically includes:
-
Armoured cable gland size chart
-
Unarmoured cable gland size ranges
-
Double compression gland selection
-
Thread types (Metric, PG, NPT, BSP)
-
Cable OD–ID matching and clamping ranges
To make this easier, you can download the full reference here: Download Cable Gland Selection Chart (PDF)
This PDF allows engineers to work faster, avoid sizing mistakes, and ensure accurate selection of cable glands for industrial, solar, wind, and electrical panel applications.
Electrical Cable Gland Types
Depending on the application, environment, and cable structure, the main electrical cable gland types include:
1. Single Compression Cable Glands
For unarmoured cables
Provides basic sealing
Ideal for indoor use
2. Double Compression Cable Glands
For armoured cables
Provides sealing at both inner & outer sheaths
Best for outdoor, heavy-duty, and high-vibration areas
3. Flameproof / Explosion-Proof Cable Glands (A2F)
Designed for hazardous zones
Prevents flame propagation
Required in flameproof or ATEX environments
4. Weatherproof & Industrial Cable Glands
Suitable for solar plants, EV chargers, wind turbines
High IP sealing such as IP66 / IP67 / IP68
Each installation requires selecting the right type of cable glands, not just the size.
ATEX Cable Glands and ATEX Certification
Some installations require glands that meet strict safety standards. This is where ATEX cable glands come into play.
What is ATEX?
ATEX is a European directive for equipment used in explosive atmospheres.
ATEX full form: ATmosphères EXplosibles
What is ATEX Certification?
ATEX certification ensures that equipment — including cable glands — can safely operate in hazardous zones containing flammable gases, vapors, or dust.
Industries requiring ATEX glands include:
-
Oil & gas
-
Chemical plants
-
Hydrogen storage
-
Offshore platforms
-
Pharmaceutical units
-
Battery energy storage systems (BESS)
ATEX cable glands are specially designed to prevent explosion risks and are mandatory in specific zones.
Certifications & Compliance
Using certified cable glands is essential for industrial safety and global compliance. Certifications give confidence that the product can withstand demanding environments.
Key Certifications to Look For:
ATEX & IECEx: Required for explosive or hazardous areas
IP66 / IP67 / IP68 Ratings: Guarantee dust-tight and waterproof performance
RoHS & REACH Compliance: Ensure environmentally safe and lead-free materials
CSA / UL Approvals: Necessary for North American installations
At Exgrip, all cable gland types, including brass cable gland, waterproof cable gland, and specialty adapters like 90° and YADP, are manufactured with these certifications, making them reliable for industries worldwide.
Conclusion & Call-to-Action
Choosing the right cable gland size is crucial for any electrical installation. With the help of a simple cable gland size calculator, understanding the relationship between electrical cable size and gland size, and using the right electrical cable gland types, engineers can ensure a safe and efficient system.
Whether you need standard weatherproof glands or advanced ATEX cable glands, always verify sizes using a detailed electrical cable gland size chart PDF.
Talk to our technical team today at Exgrip.com
Or call us directly for quick assistance!
Contact Us:
Phone: +91 9537118899
Website: www.exgrip.com
Request a Quote: Contact Page
FAQs
What is a cable gland?
A cable gland is a mechanical device used to securely terminate cables into electrical equipment. It provides sealing, strain relief, and protection against dust, water, and vibration. Cable glands are essential in panels, junction boxes, motors, and industrial machinery.
Why is cable gland sizing important?
Choosing the correct gland size ensures proper sealing and mechanical grip. Incorrect sizing may cause loose connections, water ingress, or electrical hazards. Always check the electrical cable size and gland size compatibility before installation.
How does the Cable Gland Size Calculator work?
The calculator matches your cable’s outer diameter (OD) with the correct gland clamping range. You measure the cable OD → select a gland whose range covers that OD → choose thread type → confirm if the cable is armoured or unarmoured.
What is the difference between armoured and unarmoured cable glands?
Armoured cable glands (usually double compression) grip both inner sheath and armour for maximum strength.
Unarmoured cable glands (single compression or A2F) provide sealing without armour clamping.
What is the difference between armoured and unarmoured cable glands?
Armoured cable glands (usually double compression) grip both inner sheath and armour for maximum strength.
Unarmoured cable glands (single compression or A2F) provide sealing without armour clamping.
Where can I download a cable gland size chart PDF?
You can download the complete size chart here: Cable Gland Selection Chart PDF
