Introduction
Have you ever asked yourself about the difference of single compression to double compression cable glands?
What are their differences?
This is your lucky day because, in this article, we will help you identify the differences between the two.
In case you didn’t know yet:
Single compression cable gland and double compression cable gland are two types of cable gland.
A cable gland is a tool which enables the user to pass a tube, wire, or cable into an enclosure while offering strain relief and sealing out liquids, dirt, and dust.
You see:
They offer strain relief and are also created to include electrical flames or sparks which might occur in hazardous settings.
The serve as a seal, stopping outside contaminants from causing any damage to the electrical system and the cable.
Some of this includes fluids, dirt, and dust.
They also stop the cables from being pulled or twisted out of the machine.
A cable gland help to offer a safe connection between the machine and cable to which it is connected.
Each of them has its own unique features, functions, parts or components and so much more.
Without further ado, let’s start exploring the differences between single and double compression cable gland.
Single Compression Cable Gland
Powered by the highest quality of raw materials, single compression cable gland won’t cause any problems.
In case you didn’t know yet, a single compression cable gland is consumed for lightly armored cables.
They have scope for corrosive and moisture vapor to enter and impact the cable.
Single compression design does not feature cone and cone ring.
You see:
There is only Neoprene rubber seal which provides mechanical support toe gland once you attach the cable.
What is Single Compression Cable Gland?
Single Compression Cable Gland
A single compression cable gland could be utilized in an average climatic condition.
Also when safeguarded by PVC shrouds, it could be utilized in corrosive settings.
Such glands are accessible in various sizes.
They are also ideal for all types of cables up to 1000 square millimeter and control cables up to 61 cores.
Single compression type stainless steel cable gland helps in offering electrical continuity between gland entry component and unarmored cable.
It also offers a seal on the outer sheath of your cable.
Therefore, making sure no damage is given to the cable sheathing.
Those are utilized both in outdoor and indoor application, in every climatic condition, as such are waterproof and weatherproof.
Single Compression Cable Gland Application
For use with unarmored cable glands, this offer security.
It also offers electrical continuity between the gland entry component and unarmored cable.
Also, it offers a seal on your outer sheath of the cable hence, making sure no damage is given to the cable sheathing.
single compression application in distribution enclosure
You see, in a single compression cable gland:
- no cone ring and no cone
- they are utilized in each motor
- offers added support to lightly armored cables entering
Components of a Single Compression Cable Gland
Single compression cable gland components
- Flat washer
Flat washers are located under the head of a nut or bolt to offer a flawless bearing surface.
It also distributes the fastener load over a much wider region.
- Lock nut
A lock nut is utilized to guarantee that a nut, once installed will always stay in place.
Also called as lock nuts, lock nuts are normally thin and utilized in cases where there’s a high chance of the first nut vibrating or shaking loose.
Such nuts are made and utilize to avoid the initial nut from becoming loose and possibly causing injury or damage when utilizing a device.
Lock nuts were made to change lock washers that didn’t work at stopping loosening over time from vibration and movement.
Lock nuts will just work as they’re supposed to if they are installed properly.
To install a lock nut appropriately, it is crucial to bolt the nut is being applied to a 1 or 2 right size wrenches.
- Rubber washer
A rubber washer is a kind of ring made of rubber utilized in mechanical devices.
It is utilized to avoid vibration from distributing from one region to another.
It lowers the noise levels.
- Neoprene rubber seal
Neoprene is a kind of rubber made by the polymerization of chloroprene.
The neoprene gasket material has to turn out to be very typical because it resists the likes of:
- oxidation
- sunlight
- ozone
- many petroleum derivatives
- Gland body nut
- Gland body
single compression cable gland selection chart
Double Compression Cable Gland
Did you know that double compression glands offer added support to those bulky armored cables that enter and exits the panel?
These are utilized for lightly armored cables.
Weatherproof double compression cable glands are dustproof and weatherproof (IP-66) that can be utilized in the standard climatic environment.
Further:
When shielded by PVC shrouds, it can be utilized in corrosive settings.
Such glands are accessible in various sizes.
These are ideal for every cable up to 1,000 square mm. And control cables.
Double Compression Cable Gland
What is a Double Compression Cable Gland?
Double compression has far different from single compression cable gland.
What does this mean?
The cool thing here is:
The double compression cable gland is employed where huge armored wires are getting out or coming into the board.
These type of cable glands provide additional support.
Double compression cable glands feature a double sealing feature.
What’s more:
There is compression at the inner sheath and cable armor.
Therefore, do you want a flameproof or weatherproof cable glands?
Then you need to take into consideration a double compression design.
What’s more:
The compression happens both at the cable armor and the inner sheath.
That is a kind of two sealing.
Thus, the likelihood of vapor or moisture entry is lowered.
Such type of glands is also called as:
- Flame-proof cable glands or
- Weather-proof cable glands
You see:
Double compression cable glands offer added support to the big armored cables exiting and entering the panel, it could also be called armored cable gland sometimes.
Double Compression Cable Gland Applications
Flame-proof glands are normally utilized in hazardous regions, as well in normal climatic conditions that are also dustproof, waterproof and weatherproof (IP68).
Along with the protection of the PVC hood, it can be utilized in various regions.
On the other hand:
Weatherproof glands are utilized in regular climatic environments that are dustproof and waterproof (IP67).
Along with the protection of PVC hood it could be utilized in various settings.
Different Parts of Double Compression Cable Glands
double compression cable gland components
- Compression
A compression seal fitting is designed to close some kind of element such as:
- Fiber optic cable
- Tube
- Pipe
- Conductor
- Wire
- Probe
When the element should pass through an environmental or pressure boundary
- Skid Washer
A skid washer might be disposed in the nut gland or under the gland.
- Armor Clamping Ring & Armor Clamping Cone
The armor clamping ring provides a level of inspectability and reliability which is unmatched. The armor cone and armor clamping ring are made to be tightened fully, metal to metal.
- Washer
To keep the ingress protection rating among the equipment and the cable gland, it might be crucial to fit a sealing washer at the equipment to gland entry interface.
The need for a sealing washer will vary on the:
- code of protection of the equipment
- ingress protection rating
- kind of entry holes accessible in that equipment
- Lock nut
Lock nuts could be utilized in conjunction with various other components like:
- toggle shoe clamp assemblies
- hand knob assemblies
- torque thumb screw
- knurled head screws
- Neoprene Outer Rubber & Neoprene Inner Rubber
- Main Gland Body
- Nipple Entry Thread
double compression cable gland selection chart
Conclusion
There you have it!
We hope we have enlightened you on the differences of single compression cable gland and double compression cable gland.
Remember that in a single compression cable gland:
When you tighten the gland, the compression or grip is affected only at one place.
It is only at the cable armor.
You see, there’s scope for corrosive and moisture vapor to arrive the gland and into the cable.
On the other hand, on double compression cable glands:
The compression takes place both the inner sheath and the cable armor as well.
Therefore, the likelihood of vapor and moisture entry are reduced.
Therefore, this type of cable glands is also known as flameproof cable glands and weatherproof cable glands.
Both single compression cable glands and double compression cable glands could be utilized for explosion proof regions.
Only that is that it must be certified and regulated for zone classifications?
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