Cable Gland Size Calculator
Recommended Cable Gland:
| Type | Size (Inch) | Size (mm) |
|---|
Important Note:
If there is 3 core cable in place of 3.5 core, please select the next lower size cable gland.
Example: For a 3 core cable where 3.5 core is specified, choose the size recommended for the next smaller cable.
Cable Gland Selection Guide
How to Use This Calculator
- Select your cable size (mm² × number of cores)
- Choose compression type (single or double)
- Click "Calculate Gland Size"
- View the recommended gland size in both inches and millimeters
Example Calculation:
For a 16mm² 4-core cable with double compression:
- Select "16×4" from the cable size dropdown
- Choose "Double Compression" from the compression type dropdown
- Click "Calculate Gland Size"
- The result shows: 1.1/8" (28mm)
Understanding Cable Gland Sizes
Cable glands are sized according to the cable's outer diameter. The size is determined by:
- Cable cross-sectional area (mm²) - The conductor size
- Number of cores - Affects the overall cable diameter
- Insulation thickness - Varies by cable type and manufacturer
- Armoring (if present) - Adds to the outer diameter
Single vs. Double Compression
| Feature | Single Compression | Double Compression |
|---|---|---|
| Sealing Mechanism | One compression point (on cable outer sheath) | Two compression points (on sheath and armor) |
| Applications | Non-armored cables, general purpose | Armored cables, hazardous areas |
| IP Rating | IP54 to IP66 | IP66 to IP68 |
| Cost | Lower | Higher |
Cable Gland Size Chart
Common cable gland sizes with their metric and imperial equivalents:
| Inch Size | Metric Size (mm) | Typical Cable Range |
|---|---|---|
| 3/8" | 10mm | 1×2, 1.5×2, 4×1, 6×1 |
| 1/2" | 12mm | 2.5×2, 16×1, 25×1 |
| 5/8" | 16mm | 1.5×3, 2.5×3, 50×1 |
| 3/4" | 19mm | 1.5×4-7, 2.5×4, 4×3 |
| 7/8" | 22mm | 1.5×10-12, 6×4, 10×4 |
| 1" | 25mm | 1.5×16-19, 16×3, 25×3 |
| 1.1/8" | 28mm | 1.5×24-30, 25×4, 35×3 |
| 1.1/4" | 32mm | 1.5×37, 35×4, 50×3 |
| 1.3/8" | 35mm | 1.5×44-52, 70×3 |
| 1.1/2" | 38mm | 1.5×61, 95×3 |
| 1.3/4" | 45mm | 2.5×52-61, 120×3 |
| 2" | 50mm | 150×3.5, 185×3 |
Installation Tips
- Measure accurately: Always measure the cable's outer diameter with calipers for precision
- Consider the environment: Choose stainless steel for corrosive environments
- Check IP rating: Ensure the gland provides adequate protection for the installation location
- Use the right tools: Proper gland installation tools ensure good compression
- Inspect after installation: Verify the gland provides a secure, watertight seal
Practical Example: Industrial Panel Installation
Situation: Installing a 95mm² 3-core armored cable in a chemical plant control panel.
Selection Process:
- Environment is corrosive → choose 316 stainless steel gland
- Cable is armored → requires double compression
- Outdoor location → needs IP68 rating
- Using the calculator: 95×3 with double compression → 1.1/2" (38mm)
Result: Select a 1.1/2" 316 stainless steel double compression gland with IP68 rating.
Cable Gland Standards
Common standards for cable glands:
- IEC 62444: International standard for cable glands
- UL 514B: US standard for conduit fittings
- ATEX: For explosive atmospheres
- NEMA 4X: For corrosive environments
- IP Ratings: Ingress protection levels