Cable Glands – The Ultimate FAQ Guide

Welcome to today’s FAQ guide for Cable Glands.

This article will deal with all of your questions and queries related to cable glands.

In this guide, you will be able to receive all the necessary information regarding cable glands, how they work, their types, uses, and all other inquiries.

Let’s get started!

1. What Is a Cable Gland?

Having multiple industrial uses, a cable gland is a tool used to connect a cable with electrical equipment.

They may serve as an attachment and securing of cables, ensuring safety and insulation.

They are also used in hazardous environments, where they serve to prevent sparks and flames from arising, ensuring safety and efficiency if the equipment being used.

Cable glands come in various sizes and are made of different materials, serving numerous functions.

 A Cable Gland

A Cable Gland

Large cable glands are usually used in larger industry scales, serving an additional function of being explosion-proof and thus serving useful as safety measures.

2. What Are the Types of Cable Glands?

There are various types of cable glands depending upon the constituent material and the area of usage.

Major categories based upon functions include:

  • Single Compression Cable Gland

A single compression cable gland is generally used for lightly armored or non-armored cables.

Its parts vary in accordance with the need of the supplier.

They are usually used within smaller buildings and for general appliances.

https://www.youtube.com/watch?v=VjEji96vdyY

A single compression cable gland is generally used for lightly armored or non-armored cables.

Its parts vary in accordance with the need of the supplier.

They are usually used within smaller buildings and for general appliances.

Single Compression Cable Gland

Single Compression Cable Gland

  • Double Compression Cable Gland

A double compression cable gland is generally used for armored cables, mainly SWA or AWA cables.

Double compression cable glands can withstand higher temperature ranges and can even be used for underground burials.

 Double Compression Cable Gland

Double Compression Cable Gland

  • Flexible Hose Cable Gland

Protective hoses serve to provide an extra layer of protection to the cable, in addition to the cable glands sealing them.

Strength is a principle benefit, with flexibility serving as an additional one.

Flexible Hose Cable Gland

Flexible Hose Cable Gland

  • PVC Cable Gland

Cable glands made of polyvinyl chloride (PVC) are basically plastic cable glands that serve all the major functions while also being cost-friendly

PVC Cable Gland

PVC Cable Gland

Cable glands are also composed of a range of different materials and thus serve in different industries for different purposes. Usual constituent materials include:

  • Aluminum
  • Brass
  • Nylon
  • Steel
  • PVC
  • Synthetic rubbers

 Cable Glands Made of Different Materials

Cable Glands Made of Different Materials

Types of cable glands may also depend upon the type of cable being used.

Principally, two major types of cables are used in industries, as follows:

  • Armored Cables
  • Unarmored Cables

https://www.youtube.com/watch?v=VjEji96vdyY

So, the types of cable glands vary widely depending upon their material, function, and usage.

3. What is the Cable Gland Size Chart?

A cable gland size chart provides a measure of the different proportions in which cable glands come in.

As mentioned earlier, cable glands are of various types.

Thus depending upon the type, there is a wide range of cable glands available for multiple purposes.

Choosing the right size is a big step in the installation of the equipment.

While choosing a size for your cable gland, many things need to be taken into consideration, including:

  • The diameter of the cable that you are using
  • The material of the cable being used
  • Size of wire
  • Diameters of additional layers of insulation if added

Below is a reference image to find the perfect size for your cable gland depending upon the type and size of the wire.

Cable Glands Size Chart

Cable Glands Size Chart

All these things need to be taken into consideration while choosing the perfect size of cable gland for your cable.

4. What Is Small Cable Gland?

As the name suggests, small cable glands are devices serving the same function as any other cable gland, just in a smaller size!

With everything being shifted on a micro level, consumers also demanded smaller cable glands for small diameter cables.

Manufacturers these days have been supplying cable glands in a large variety of sizes, ranging from a few millimeters to even centimeters!

Small Cable Glands

Small Cable Glands

Thus, small cable glands can be used on thinner wires now, which has served to increase their efficiency and range of usage in various industries effectively.

These small devices now serve a large purpose in industries as well as in everyday use.

5. What Is the Function of Cable Gland?

Cable glands are relatively small but effective devices that serve various functions depending upon their type and place of usage.

The principal use of a cable gland is to serve as a means of attachment of wires to equipment.

Thus, they are used in industries to secure and protect the appliance.

Other functions served by an electrical cable gland include:

  • Bonding and attachment
  • Grounding
  • Insulation and guarding
  • Strain reduction

Cable glands can be used in almost all types of electrical appliances, being highly useful in their range of functions.

The connection is their main function, and they are also used to provide safety and insulation in industries.

Function of Cable Gland

Function of Cable Gland

6. What is A Large Cable Gland?

A large cable gland is a device that attaches to the ends of the electrical cables.

It has many industrial uses.

Such cable glands are mostly used to secure different types of equipment.

A large cable gland is mostly used to provide the strain-relief.

These types of cable glands are usually used in larger industry scales, serving an additional function of being explosion-proof and thus serving useful as safety measures.

 Some Cable Glands

Some Cable Glands

7. What Are Cable Gland Sizes?

Cable glands come in different sizes and shapes, depending upon your needs.

The size of a cable gland also depends upon the material it is made of.

While choosing a size for your cable gland, many things need to be taken into consideration, including:

  • The diameter of the cable that you are using
  • The material of the cable being used
  • Size of wire
  • Diameters of additional layers of insulation if added

Extra protective features may also be installed depending upon the environment and appliance of the users.

Below is a reference image to find the perfect size for your cable gland depending upon the type and size of the wire.

 Cable Glands Size Chart

Cable Glands Size Chart

8. What Are Electrical Cable Glands?

Electrical cable glands or simply cable glands are small instruments that serve as means of attachment for an electrical cable to an electrical instrument.

Other functions served by an electrical cable gland include:

  • Bonding and attachment
  • Grounding
  • Insulation and guarding
  • Strain reduction

Cable glands can be used in almost all types of electrical appliances, being highly useful in their range of functions.

The connection is their main function, and they are also used to provide safety and insulation in industries.

Materials comprising a cable gland may vary, including both metallic and non-metallic components.

 Electrical Cable Glands

Electrical Cable Glands

9. What Is Double Compression Cable Gland?

A double compression cable gland is generally used for armored cables, mainly SWA or AWA cables.

Armored cables have high endurance to stress and strain and can be used in harsh environments or with heavy loads.

Double compression cable glands can withstand higher temperature ranges and can even be used for underground burials.

They also provide mechanical retention and support.

Usually made of brass or aluminum, double compression cable glands may also be weatherproof and flameproof.

A Double Compression Cable Gland

A Double Compression Cable Gland

Double compression cable glands are used for heavy industries, where armored cables are required.

Their parts and constituents are also different as compared to single compression cable glands.

They have additional locks and nuts, providing an extra range of security and protection.

10. What Is Split Cable Gland?

Split cable glands are basically cable glands that can be separated into two pieces from the middle.

Thus, the two halves of the body contain an insertor in the middle.

Split Cable Glands

Split Cable Glands

Split cable glands have provided an immense advantage over the conventional cable glands: installation.

Being split into two halves, the cable can be inserted in between with great ease, and the whole assembly can be put together, saving a lot of time.

Split cable glands are also known to provide greater strain relief and increased protection.

11. What Is Marine Cable Gland?

Marine cable glands are cable glands specifically designed for marine cables.

These are used on marine waterproof cables serving multiple functions.

Cables designed for marine applications may be sealed with marine cable glands, which provide better protection and are also corrosion resistant to a great extent.

Marine cable glands are used on non-armored cables, with no extra layers of protection.

They provide long-lasting cable life and are able to sustain high pressure and temperature.

 Marine Cable Gland

 Marine Cable Gland

Waterproof Cable Glands

Waterproof Cable Glands

12. What Is Metallic Cable Gland?

Metal cable glands provide entrance of cables into machinery and equipment, all the while maintaining protection and securing the cable.

Metallic cable glands play a big role in industries, providing secure connections as well as strain relief.

Usual metals comprising a cable gland include:

  • Brass
  • Aluminum
  • Steel
  • Nickel

An additional coating of another metal may also be done to increase efficiency.

For example, a brass cable gland may be coated with nickel.

That is also the most common type of cable gland used in industries.

Cable glands may also be made of materials other than metals, including PVC and nylon.

The material used does not affect the primary function of the cable gland, that is, attachment and protection.

Additional advantages may be served using various types.

Metallic Cable Gland

Metallic Cable Gland

13. How Is Cable Gland Installed?

Installation of a cable gland involves various steps.

A series of necessary precautions must be taken prior to the installation of a cable gland.

Protective gear should be worn while installing electrical equipment.

Also, turn off all power supplies before inserting or removing any cable from the equipment.

The cable gland should also be protected from dirt or other harmful substances.

Here is a video to give you all the necessary information regarding the installation of a cable gland.

https://www.youtube.com/watch?v=ZFnNDuCSz-8

The cable needs to be cut inappropriate size for the cable gland to fit in, and then it is inserted through the rings into the locks.

The insertion of the cable into the sealing ring involves some careful steps.

14. What Are Parts of Cable Gland?

As discussed earlier, there are various types of cable glands.

Depending upon the type of cable gland, the parts of a cable gland may also vary.

The parts that all types of cable glands have in common include:

  • A body
  • A seal
  • An entry hose
  • A lock

Single and double compression glands may vary in parts in many ways.

Similarly, a split cable gland also contains different parts as per the consumer’s needs.

A double compression gland may contain an additional pair of locks and nuts, providing maximum security and protection.

It also contains features that other types of cable glands do not, thus serving useful in the high scale industry.

 Parts Of A Double Compression Cable Gland

Parts of A Double Compression Cable Gland

For a detailed view of the parts of a cable gland, take a look at the following video

https://www.youtube.com/watch?v=aTXslXf64IE

15. What Is M32 Cable Gland?

As we are well aware, cable glands come in different sizes according to our needs.

Major types of cable glands include a standard size known as “metric standard.”

These glands come in various sizes, one of which is the M32 cable gland.

Metric threads are generally used for commonly used screw threads.

Metric threads have a wide range of sizes in millimeters, serving various purposes in industries.

 Size Chart Of M32 Cable Gland

 Size Chart of M32 Cable Gland

An M32 cable gland is a widely used cable gland made of different materials, including brass, nylon, or even plastic.

16. What Is Multi Cable Gland?

Multi cable glands, also known as multi-hole cable glands or multi passage cable glands, are small devices that contain more than one entrance for a cable.

Thus, they can serve as a means of attachment for multiple cables and wiring, giving more efficient and effectively taking less space.

Made of all the usual materials and serving the same function as any other cable gland, a multi-cable gland serves the big advantage of providing multiple entry points to cable and saving a lot of space.

They may contain from two to numerous holes allowing the passage of cables and sealing them in place, thus serving all the functions effectively and efficiently.

Multi Cable Glands

Multi Cable Glands

17. What Is Nylon Cable Gland?

Cable glands serve as attachment devices of cables to various equipment.

They are made of different materials and come in different types.

As the name suggests, a cable gland made of nylon is called a nylon cable gland.

Some advantages that nylon cable glands serve on usual metallic cable glands include:

  • They come in different colors.
  • Have a high IP Rating
  • Are non-flammable

These mean that they are even safer to use and can also be used to color-code the wires, avoiding mess in services.

18. What Is Split Cable Gland?

Split cable glands are basically cable glands that can be separated into two pieces from the middle.

Thus, the two halves of the body contain an insertor in the middle.

Split Cable Glands

Split Cable Glands

Split cable glands have provided an immense advantage over the conventional cable glands: installation.

Being split into two halves, the cable can be inserted in between with great ease, and the whole assembly can be put together, saving a lot of time.

Split cable glands are also known to provide greater strain relief and increased protection.

19. What Are Cable Gland Nuts?

Cable glands consist of different parts and are really handy devices.

A part of a cable gland, known as locknut or simply nut, is a small six-cornered ring that is used to attach and secure a cable with the body of the cable gland.

These apparently small sized rings serve a major function in sealing the cable and keeping it in place.

These are usually located in single and double compression cable glands.

 Cable Gland Nuts

Cable Gland Nuts

Once lost, parts of cable glands are rarely found separately.

So, make sure you secure them properly, so they are not misplaced.

30. What Are Cable Gland Connectors?

A cable gland is a device used to connect a cable with electrical equipment. .

They are also used in hazardous environments, where they serve to prevent sparks and flames from arising, ensuring safety and efficiency if the equipment being used.

Here is a guide for connecting cable glands:

https://www.youtube.com/watch?v=OjfabYAbQuk

Cable glands come in various sizes and are made of different materials, serving numerous functions.

Connector cables are larger cables that can also be brought together via cable glands.

21. What Is ul Cable Gland?

A UL cable gland simply refers to a cable gland that is approved for use by a not-for-profit organization known as Underwriters Laboratories(UL).

This organization, dating back to the previous century, dedicates itself to ensuring that products and appliances that enter the market are not safety hazards or lacking with regards to quality standards, meet performance expectations, and are sustainable.

 ul Cable Gland

 ul Cable Gland

In order to attain UL certification, manufacturers must produce high-quality products that will then be thoroughly tested by UL, a process made legitimate through the use of independent, third-party authorities.

A UL approved Cable gland is one that has passed through UL’s rigorous testing and verification, and its certification guarantees it’s a low safety risk and high-quality craftsmanship.

22. What Is Ex-Proof Cable Gland?

An Ex-proof cable gland, or an explosion-proof cable gland, is one that has been designed to protect the equipment or its vicinity from an explosion or fire damage.

This is done through its built-in capacity to contain any potential spark’s temperature, thereby preventing the ignition of dangerous substances.

The various protection methods, including, but not limited to, Ex E, Ex D, Ex E, and Ex P etcetera, vary in their exposure to an atmosphere containing hazardous vapor or mist with the potential to explode, depending on the way they control temperature, pressure, and whether or not there is a controlled reaction within or without the cable gland.

An Ex-proof cable gland ensures that the electrical energy stays within safe limits in a hazardous environment to prevent any explosions.

Ex-Proof Cable Gland

Ex-Proof Cable Gland

23. What Is EMC Cable Gland?

An EMC cable gland is a shielded cable that is suited for electromagnetic compatibility (EMC), whereby the cables are protected from electromagnetic interference through the tightening of EMC glands.

Passing the outer sheath of the cable through the EMC gland and the compression of a said gland not only facilitates the protection of the cable from electromagnetic forces but also serves the purposes of withstanding dust, dirt, sand, and water (up to a limited extent) and reducing the forces of stress and tension that a cable could be exposed to.

EMC Shielded Cable Gland

 EMC Shielded Cable Gland

24. What Is Pg Thread Cable Gland?

Thread dimension, one of the specifications for a table gland, is divided into three types: metric, PG, and NPT. PG, which stands for Panzergewinde, or “Panzer thread,” is a German steel conduit thread that connects electrical conduits to cable glands.

The prefix PG and a number pertain to the maximum diameter of a conduit that a cable can pass through.

As compared to the metric and NPT threads, the depth of a PG thread is smaller since the walls of a conduit are thinner, but its flank angle is larger, thereby straightening the thread.

PG thread cable glands are best suited for use in chemical reactors and bioreactors.

PG Thread Cable Gland Size Chart

PG Thread Cable Gland Size Chart

25. How Do Cable Glands Work?

A cable gland, also known as a cable connector or cable fitting, is a tool that connects electrical cables to equipment or machinery.

Besides passing a cable or an electrical conductor safely through an enclosure, they also perform various other roles, such as:

  • Offering strain relief to prevent any breakage owing to high levels of stress or tension in the cable
  • Acting as a seal, or a barrier to the entry of external contaminants such as dust, dirt, or water
  • Containing electrical energy to prevent explosions if the equipment is in a hazardous environment
  • Earthing to reduce shocks and electrocution
  • Terminating cables in hazardous environments
  • Insulation

These mechanical cable entry devices work by compressing a seal into the round cable, ensuring a connection as well as preventing the entry of particles that could damage the equipment.

26. What Are Cable Glands for Armored Cables?

Armour cable glands are cable glands designed to be used with armored cables, or steel-wired armored cables (SWA), which are power cables protected by a steel wire mesh to undergo high stresses.

Such wires, carrying mains electricity, are connected to cable glands built to be used in underground projects for underground systems or installing cables for networks.

They provide great durability as well as weather and flameproof abilities.

Cable Glands For Armored Cables

 Cable Glands for Armored Cables

27. What Are Cable Glands for Flat Cables?

Flat cables are any type of electrical cable which has a really thin diameter and can be used to save space and increase efficiency.

They have multiple advantages over round cables.

As the shape of a flat cable is different than the round cables.

Thus the connectors and cable glands are also different.

Consider the shape below:

 Flat Cable Gland

Flat Cable Gland

Serving all the usual functions as a conventional cable gland, flat cable glands come in handy wherever a flat cable is required, such as telecommunication and several other industries.

28. What Is SWA Cable Gland?

Armored cables are cables that have an additional layer of metallic coating over their outer coating.

This armor provides additional insulation and strength to the cables, increasing their resistance and durability.

Armor can be of steel (SWA) or aluminum (AWA).

Both types are used in industries over a large range of applications, usually in high voltage supplies, rendering them useful in their applications and strength.

SWA cable glands, glands used on armored cables, are usually the double compression cable glands.

They provide great durability as well as weather and flameproof abilities.

 Armored Cable Gland

 Armored Cable Gland

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