How to Choose a Cable Gland? PG11, Plastic, or Metal – A Practical Guide
, by Tomasz Sawicz, 9 min reading time
🔧 Which cable gland should I choose? Differences between plastic and metal and what does PG11 mean?
Cable glands (cable entries) are small but crucial components in any electrical installation. They ensure tight and safe routing of cables through enclosures, junction boxes, and switchboards . In this article, we explain:
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What is the difference between plastic and metal chokes?
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How to choose choke material for operating conditions?
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What does the size of the gland e.g. PG11 mean?
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How to avoid common selection mistakes?
⚙️ Plastic vs. metal chokes – the most important differences
| Characteristic | Plastic gland | Metal choke |
|---|---|---|
| Material | Polyamide (PA), self-extinguishing | Nickel-plated brass, stainless steel |
| Chemical resistance | High (for general use) | Very high – for aggressive environments |
| Mechanical resistance | All right | Very high (compression and impact resistance) |
| Temperature resistance | Typically -20°C to +80°C | From -40°C to even +130°C |
| Application | Home and office installations, switchboards in dry environments | Industry, chemical plants, outdoor, devices exposed to vibrations |
| Appearance | Matte black or gray | Silver (metallic shine) |
| Price | Lower | Higher (but for greater durability) |
📌 Conclusion: If you're looking for a gland for a standard distribution box at home or in the office, a plastic one will suffice . If you work in industry, a machine room, or a workshop, choose a metal one.
📏 What does the gland size mean, e.g. PG11?
Cable glands come in various sizes, designated by the abbreviations PG (Panzer-Gewinde) , M (metric), or sometimes NPT (in the USA). PG11 is one of the most common sizes.
| Designation | Thread diameter | Cable diameter (working range) |
|---|---|---|
| PG11 | approx. 18.6 mm | 5 – 10 mm |
| PG7 | approx. 12.5 mm | 3 – 6.5 mm |
| PG13.5 | approx. 20.4 mm | 6 – 12 mm |
| PG16 | approx. 22.5 mm | 10 – 14 mm |
🧠 Note: PG diameter doesn't indicate the hole diameter, but rather the thread size , which must fit the housing. Always check the cable diameter range that can be crimped.
💡 When to choose a choke with a high IP?
If you're installing your equipment outdoors, in a bathroom, workshop, or hall, look for glands with an IP68 rating (complete dust and water resistance). In other cases, IP54 or IP65 will be sufficient.
🧰 Application examples:
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Plastic gland PG11 IP68: for a hermetic box on the house facade
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Metal gland PG13.5: for distribution boards in industrial halls exposed to vibrations and dust
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PG7 gland: for passing a thin cable into the sensor housing
🛒 Looking for the right choke?
In the EURO-BOX store you will find a wide selection:
👉 Cable glands and bushings – offer overview
Choose the right size and material – ensure durability and safety of the installation!
📞 Have questions? Our advisors will be happy to help you select the perfect choke for your application.
