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Single and Double Compression
Categories Cable Gland

Understanding the Difference Between Single and Double Compression Cable Glands

Categories Cable Gland

Introduction

Cable glands are essential components in various electrical installations, ensuring safe and reliable connections between cables and equipment. Whether in industrial or residential applications, selecting the right cable gland types and sizes is critical for optimal performance. Among the most commonly used cable glands are single compression cable glands and double compression cable glands. Although both perform the vital function of sealing and protecting cables, their design and applications vary significantly. This blog explores the difference between single and double compression cable glands, helping you understand their respective features, uses, and components.

Single Compression Cable Gland

A single compression cable gland is the simpler of the two, often used in environments where lower levels of mechanical stress and sealing are required. These glands are ideal for outdoor and indoor installations in controlled environments where the risk of water ingress or high pressure is minimal. Cable gland sizes for single compression glands vary to accommodate different cable diameters, ensuring a snug fit without damaging the cable.

Single Compression Cable Gland Application

Single compression cable glands are primarily used in industrial and residential settings where protection against dust and moisture is needed but where mechanical stress is not extreme. They are typically found in smaller equipment, control panels, and junction boxes. Due to their design, they are more suitable for indoor use, where exposure to hazardous environments is limited. The affordability of single compression cable glands makes them an attractive option for general-purpose applications.

Applications include:

  • Control panels
  • Electrical junction boxes
  • Small machines and appliances

Components of a Single Compression Cable Gland

A single compression cable gland has a straightforward structure that makes it easy to install. Its primary components include:

  1. Gland Body: The main part of the gland that connects the cable to the equipment.
  2. Compression Nut: Ensures the tight fit of the cable inside the gland.
  3. Sealing Ring: Provides a seal to prevent dust and moisture from entering.\
  4. Locknut: Secures the gland to the equipment.

Each component plays a vital role in the gland’s overall performance, ensuring that the cable remains protected under normal conditions. However, for more challenging environments, a double compression cable gland may be required.

Double Compression Cable Gland

A double compression cable gland is more robust and designed for harsher environments, offering enhanced protection and sealing capabilities. These glands are engineered to prevent the ingress of water, dust, and other contaminants, making them ideal for outdoor applications or industries with higher mechanical stresses.
The design of double compression cable glands allows for a more secure and tight fit compared to single compression glands. In addition to providing external compression, these glands offer internal compression, which enhances their sealing properties. These glands are ideal for industries where cables are exposed to outdoor elements or hazardous environments, providing added protection and longevity.

Double Compression Cable Gland Applications

The applications of double compression cable glands are broader due to their superior sealing properties. They are used in industries like oil and gas, petrochemical, and heavy machinery, where the risk of water ingress, corrosion, or mechanical damage is high. These glands are particularly useful in environments where cables are exposed to dust, moisture, and hazardous chemicals.

Common applications include:

  • Outdoor installations
  • Petrochemical plants
  • Oil and gas industries
  • Heavy machinery

Different Parts of Double Compression Cable Glands

The double compression cable gland consists of several components designed to ensure maximum protection:

  1. Gland Body: The main body that houses the cable.
  2. Outer Compression Ring: Compresses the outer cable sheath, providing an additional layer of sealing.
  3. Inner Compression Nut: Tightens the cable within the gland for internal sealing.
  4. Sealing Washer: Ensures that no water or dust can enter the gland.
  5. Locknut: Secures the gland to the equipment.
  6. Earth Tag: Provides grounding to prevent electrical faults.

These additional parts give double compression cable glands their ability to withstand extreme environmental conditions, making them indispensable in industrial settings that demand high levels of protection.

Conclusion

In summary, the key difference between single and double compression cable glands lies in their design, applications, and level of protection. Single compression cable glands are ideal for general-purpose use, offering basic sealing and protection in low-risk environments. On the other hand, double compression cable glands provide enhanced sealing, making them suitable for industries with harsh environmental conditions.

When selecting between these two types, it’s essential to consider factors like cable diameter, the environment, and the level of mechanical stress the gland will endure. Atlas Metal, a leading cable glands manufacturer in Jamnagar India, offers a wide range of cable gland types and sizes to meet your specific needs. Whether you require the simplicity of single compression or the robust protection of double compression, Atlas Metal has the solution for you.

For more information on our selection of cable glands, feel free to explore our catalog or contact us for expert advice.

FAQs

Industries such as oil and gas, petrochemical, and heavy machinery benefit from double compression cable glands due to their superior protection against environmental hazards.

You can refer to the cable gland size chart provided by the manufacturer, ensuring that the gland matches your cable's diameter and environmental requirements.

Yes, cable glands come in various materials, including brass, stainless steel, and aluminum. Atlas Metal is a brass components manufacturer in Jamnagar offering high-quality brass cable glands.

The sealing washer provides an additional layer of protection by preventing the ingress of water, dust, and other contaminants.

While single compression glands are suitable for controlled environments, they may not provide adequate protection in outdoor settings where high mechanical stress and moisture are concerns.

Categories Brass Conduit Fittings Cable Cleats Cable Gland Cable Lugs

Cable Glands Size Chart: A Beginner’s Guide to Cable Gland Sizing by Atlas Metal

Categories Brass Conduit Fittings, Cable Cleats, Cable Gland, Cable Lugs
Cable gland size chart

Introduction

In the world of electrical installations, choosing the right cable gland size is crucial for ensuring the safety and reliability of connections. Cable glands serve as a protective mechanism where cables enter equipment, securing the cable and providing strain relief. While this might sound straightforward, the sizing of cable glands can often be complex, especially for those new to this domain. In this beginner’s guide, we’ll take you through the fundamentals of cable gland sizing, offering a comprehensive cable glands size chart and explaining how to measure and select the correct size.

Atlas Metal, a leader among cable gland manufacturers in India, has crafted this guide to help both novice and experienced users understand and choose the right cable gland for their needs. Whether you’re looking for specific types of cable glands or need to understand the differences in size, this guide will equip you with all the essential information.

Cable Gland Size Chart

One of the most important tools for selecting the right cable gland is a cable glands size chart. This chart serves as a reference for matching the diameter of the cable with the appropriate gland size. It’s essential to consult this chart before purchasing to ensure a secure and safe connection.

Cable Diameter (mm) Gland Size
3.5 – 6 16mm
6 – 9 20mm
9 – 12 25mm
12 – 15 32mm
15 – 18 40mm

These are common sizes, but it’s always recommended to double-check with specific manufacturers, such as cable gland manufacturers in Jamnagar, for region-specific charts or specialized projects. The cable gland size you choose should match the cable’s outer diameter, taking into account factors such as insulation and environmental conditions.
Consulting a reliable cable glands size chart can significantly streamline the selection process and ensure the gland fits securely without causing damage to the cable or the equipment.

How to Measure Cable Glands

Measuring the correct size for a cable gland involves understanding a few key dimensions. The first measurement to note is the cable’s outer diameter. This determines the basic gland size. However, there are other measurements to consider, such as:

  1. Thread Size: This refers to the diameter of the threaded part of the gland that screws into the equipment.
  2. Entry Hole Size: The size of the hole in the equipment where the gland will be installed.
  3. Seal Length: This refers to the length of the gland that will engage with the equipment.

To measure accurately:

  • Use a caliper to measure the outer diameter of the cable.
  • Measure the hole where the gland will be installed to ensure a snug fit.
  • Cross-check these measurements with the cable gland size chart.

Measuring these components ensures that the gland fits properly, preventing issues like over-tightening, which can lead to electrical failures or equipment damage. Many cable gland suppliers provide detailed instructions, but following basic measurement guidelines will give you a solid foundation for selecting the correct gland size.

How to Check You Have the Correct Cable Gland Size

Once you’ve measured and selected the gland size using a cable gland size chart, it’s essential to verify the fit. Here’s how you can check if the size you’ve chosen is correct:

  1. Dry Fit Test: Insert the cable through the gland without fully tightening it. The cable should slide through easily, but once the gland is tightened, it should form a firm seal around the cable.
  2. Check for Strain Relief: Ensure that the gland provides adequate strain relief to protect the cable from pulling and twisting.
  3. Inspect the Seal: Once installed, check for any gaps between the gland and the cable. A good fit will have no gaps and will create a seal that prevents ingress of dust, dirt, or moisture.

If the gland is too large, it won’t provide adequate sealing, leading to potential damage. Conversely, a gland that is too small may strain the cable, causing unnecessary wear. Double-checking these factors is essential to ensuring a secure installation.

How to Choose a Cable Gland

Choosing the right cable gland involves more than just looking at a cable glands size chart. Consideration must also be given to:

  1. Material: Cable glands are typically made from brass, stainless steel, or plastic. For industrial applications, brass glands are highly recommended for their durability and corrosion resistance. Atlas Metal, a trusted cable gland manufacturer in India, specializes in high quality brass cable glands.
  2. Application: The environment where the cable gland will be installed is critical. In hazardous environments, explosion-proof glands might be necessary. In outdoor environments, glands should have IP ratings that protect against water and dust.
  3. Certifications: Ensure that the cable glands meet relevant industry standards for safety and performance. Common certifications include ATEX and IECEx for hazardous areas.

Consulting with reputable cable gland manufacturers in Jamnagar and other regions ensures you receive expert guidance for selecting the appropriate gland for your specific application.

Shop Our Selection of Cable Glands

At Atlas Metal, we offer a wide range of high-quality brass cable glands designed for various industrial applications. Our product selection includes cable glands that are meticulously engineered to meet industry standards, ensuring durability and reliability.
Whether you are looking for cable gland types and sizes for small-scale projects or specialized installations, our catalog offers a vast selection suited to your needs. As a premier cable gland supplier, we pride ourselves on offering products that provide excellent performance, reliability, and ease of installation.
To shop our full range of cable glands, visit our website and explore our collection tailored to meet diverse requirements.

Related Products

In addition to cable glands, we also offer a range of related products, including:

  1. Cable Lugs: These are essential components for securely terminating cables in electrical connections.
  2. Brass Fittings: Known for their durability and resistance to corrosion, brass fittings are used in various applications, from plumbing to electrical installations.
  3. Conduit Fittings: Designed to protect cables and wires, conduit fittings are available in a variety of sizes to suit different project requirements.

As one of the leading cable gland manufacturers in India, we ensure that all our products are crafted with precision and tested for high performance.

FAQs

A cable glands size chart is essential for ensuring you select the correct size cable gland for your installation. It helps match the outer diameter of the cable to the appropriate gland size, preventing issues like improper sealing, which can lead to equipment failure or safety hazards. Using a size chart simplifies the process of finding the right gland for your specific cable type.

For hazardous environments, it’s essential to choose a cable gland that meets stringent safety standards, such as ATEX or IECEx certification. In such cases, explosion-proof or flameproof glands are recommended. Always consult cable gland suppliers who specialize in these types of glands to ensure the product is fit for purpose. Cable gland manufacturers in India, like Atlas Metal, offer high-quality, certified cable glands suitable for hazardous areas.

Cable glands are typically made from materials like brass, stainless steel, or plastic. Brass is highly durable and corrosion-resistant, making it ideal for industrial applications. Stainless steel is recommended for environments with extreme conditions, while plastic is suitable for lighter-duty installations. Brass cable glands, offered by cable gland manufacturers in Jamnagar, are a popular choice for their durability and resistance to harsh conditions.

No, it’s crucial to select the correct gland size by referring to a cable glands size chart. Using a gland that’s “close enough” can lead to improper sealing, inadequate strain relief, or potential damage to the cable. Always ensure the gland matches the exact outer diameter of the cable for optimal safety and functionality.

When selecting cable glands, look for certifications like ATEX, IECEx, or UL. These certifications ensure that the cable gland meets specific safety and performance standards, particularly in hazardous environments. Leading cable gland manufacturers in India, such as Atlas Metal, offer certified products that guarantee durability, performance, and safety compliance in demanding industrial applications.

A comprehensive guide to industrial cable glands
Categories Cable Gland

A comprehensive guide to industrial cable glands

Categories Cable Gland

As a renowned manufacturer in the metal industry, Atlas Metal recognises the significance of quality and reliable cable glands in industrial applications. In this blog, you will gain detailed knowledge about cable glands, including their types, installation, and maintenance.

Industrial Cable glands are vital for providing secure connections and protecting cables. Whether in hazardous environments or heavy-duty applications, industrial cable glands ensure optimal electrical installations by offering essential protection. They are used in industries like railways, oil and gas, and mining, providing crucial protection and reliable connectivity for a wide range of applications.

Now, let’s explore the different types of industrial cable glands.

stainless steel cable glands
Brass cable glands
Armoured cable glands
Metal cable glands 03

Types of Industrial Cable Glands

Let us learn about the different types of earthing bars that are used based on specific requirements.

1. Armoured Cable Glands
Armoured cable glands are designed to use with armoured cables. These cable glands provide secure and reliable connections while offering enhanced protection against mechanical strain, ensuring the integrity of the cable in demanding environments.

2. Metal Cable Glands
Constructed from durable metals such as brass or aluminium, metal cable glands offer robustness and longevity. They provide excellent protection against environmental factors and are suitable for a wide range of industrial applications.

3. Stainless Steel Cable Glands
Stainless steel ss cable glands are ideal for harsh and corrosive environments. They offer exceptional resistance to corrosion, which makes them highly durable and suitable for industries such as marine, oil and gas, and chemical processing.

4. Brass Cable Glands
Known for their excellent electrical conductivity and resistance to corrosion, brass cable glands are widely used in various industrial settings. They offer reliable sealing and secure connections, making them a popular choice for various applications.

5. Plastic Cable Glands
Made from high-quality engineering plastics, these cable glands offer cost-effective solutions for non-corrosive environments. They are lightweight, easy to install, and provide good sealing properties, making them suitable for a range of industrial and commercial applications.

Materials used in Industrial Cable Glands

While choosing an earthing bar, consider the following criteria for optimal performance:

1. Polyamide
Durable and chemically resistant material commonly used for industrial cable glands.

2. PVC
Versatile material providing good electrical insulation for industrial cable glands.

3. TPE
Flexible and weather-resistant material used for reliable sealing in cable glands.

4. Rubber
Offers excellent sealing properties and protection against moisture and environmental elements in cable glands.

5. Metal Alloys
Robust and corrosion-resistant materials like brass, aluminium, or stainless steel are mainly used for industrial cable gland applications.

Selection Criteria for Industrial Cable Glands

Consider the following key criteria while choosing industrial cable glands to ensure optimal performance, safety, and longevity of electrical installations.

1. Cable Diameter and Type

Accurate measurement of the cable diameter is essential for selecting the appropriate gland size. Consider the cable type as well, such as armoured, unarmored, or braided, to ensure a secure and proper fit. Atlas Metal advises carefully matching the cable dimensions to the compatible cable gland, ensuring effective sealing and strain relief.

2. Operating Temperature and Pressure

Take into account the expected operating temperature and pressure conditions in your application. Different cable glands are designed to withstand varying temperature ranges and pressure levels. Atlas Metal recommends choosing cable glands that are compatible with the anticipated environmental conditions to ensure reliable performance and avoid premature failure.

3. Environmental Conditions

Evaluate the surrounding environment where the cable glands will be installed. Factors such as moisture, dust, chemicals, or extreme weather conditions should be considered. Atlas Metal emphasises selecting cable glands with appropriate IP (Ingress Protection) ratings and materials that offer suitable resistance ensuring reliable protection against environmental elements.

4. Systematic Classification of Hazardous Areas

In applications involving hazardous areas, such as explosive atmospheres, it is vital to choose cable glands that meet specific requirements. Atlas Metal advises systematically classifying the hazardous area and selecting cable glands with suitable certifications, such as ATEX or IECEx, to ensure compliance and safety.

By carefully considering the above selection criteria, you can confidently choose industrial cable glands that will align with your application’s needs, ensuring secure connections, reliable performance, and enhanced safety in your electrical installations.

Step-by-step Installation Procedures for Industrial Cable Glands

To ensure a proper and efficient installation of cable glands, the steps given below can be followed.

Step 1: Prepare the Cable
Measure and cut the cable to the desired length, ensuring sufficient excess for proper connection to equipment.

Step 2: Strip the Cable
Use cable strippers to remove the outer insulation, exposing the conductors. Take care not to damage the inner wires.

Step 3: Select the Correct Cable Gland
Choose a cable gland that matches the cable diameter and type, ensuring a secure and proper fit.

Step 4: Prepare the Cable Gland
Disassemble the cable gland by removing the locknut, sealing ring, and gland body. Place the sealing ring onto the cable.

Step 5: Insert the Cable into the Gland
Carefully thread the cable through the gland body until it reaches the sealing ring. Make sure the cable is centred and not twisted.

Step 6: Tighten the Locknut
Slide the gland body over the cable and hand-tighten the locknut onto the body until it is snug. Avoid over-tightening.

Step 7: Check for Proper Positioning
Ensure that the cable is properly positioned within the gland and that the sealing ring is correctly seated. Adjust if necessary.

Step 8: Secure the Gland in Place
Use a spanner or wrench to tighten the locknut securely, ensuring a watertight and secure connection.

Step 9: Test the Connection
Conduct a thorough visual inspection to ensure the cable gland is properly installed. Perform any required electrical or continuity tests.

Step 10: Finalise the Installation
Secure the cable gland to the equipment or enclosure, following the manufacturer’s instructions. Make sure the cable is properly strain relieved.

It is important to note that these installation steps are provided as a general guide. Always consult with a qualified installation specialist and ensure secure connections and optimal performance.

Regular Inspection and Cleaning for Cable Gland Maintenance

As a leading cable gland manufacturer, Atlas Metal suggests that you conduct routine inspections of cable glands to check for any signs of wear, corrosion, or damage. Clean cable glands periodically to remove dust, debris, or contaminants that may hinder performance. Below listed are some of the problems that you may encounter during the regular inspection.

1.Problem:Inadequate sealing is leading to moisture or dust ingress.
Solution: Ensure proper installation and use of suitable sealing materials.

2.Problem: Poor cable retention causing slippage or loosening.
Solution: Check the grip of the cable gland and adjust or replace, if necessary.

3.Problem: Thread mismatch or improper gland size selection.
Solution: Double-check compatibility and choose the correct size and thread type for a secure fit.

4.Problem: Cable gland accessories are not properly installed or functioning.
Solution: Verify the proper installation and functionality of accessories such as locknuts, washers, and sealing rings.

Conclusion

A detailed understanding of industrial cable glands is crucial for achieving efficient and reliable electrical installations. By comprehending the various types, materials, and installation procedures, you can make informed decisions and ensure optimal performance in your applications.

With over two decades of experience, Atlas Metal stands as a trusted leader in the metal industry, specialising in manufacturing high-quality electrical and lightning safety solutions, including cable glands and cable gland accessories. Atlas’s commitment to excellence and relentless pursuit of innovation guarantee the manufacturing of premium quality products that prioritise safety and superior performance.