What Are Armored Fiber Optic Cables?
Armored fiber optic cables are specially designed to provide an additional layer of protection against external factors that could otherwise damage the fibers. The protection layer, often made of steel, aluminum, or other sturdy materials, surrounds the fiber optic strands and ensures that the cables can withstand physical stress such as impact, crushing, and other mechanical forces.
These cables are ideal for underground installations, where they may be exposed to potential damage from digging, rocks, construction equipment, rodents, or harsh environmental conditions. Armored cables are commonly used in situations where fiber optic cables are vulnerable to external physical threats and require enhanced protection to ensure reliable data transmission over time.
Why Are Armored Fiber Optic Cables Essential for Underground Installations?
Underground installations come with their own set of challenges. Armored fiber optic cables offer the following key advantages in underground applications:
1. Protection Against Physical Damage
One of the most significant advantages of armored fiber optic cables is the physical protection they provide. Unlike standard fiber optic cables, which can easily be cut, crushed, or damaged, armored cables are designed to resist such external forces. The armor acts as a strong barrier, preventing damage that could disrupt the signal transmission.
This is especially important for underground fiber optic networks, where cables can be subjected to digging, construction, and mechanical stresses. Without the added protection of an armor layer, the risk of accidental damage increases, leading to potential downtime and costly repairs.
Learn more about the types of fiber optic cables, including armored cables, in our complete guide.
2. Durability in Harsh Environments
Fiber optic cables installed underground are exposed to challenging environmental conditions, such as moisture, extreme temperatures, and physical pressure from surrounding soil or rocks. Armored cables are designed to handle these conditions without compromising their performance.
The armor ensures that the cable can withstand the mechanical stress of being buried underground, where rocks, debris, and even soil movement can exert pressure on the cables. The added durability ensures the cable maintains a long service life, often exceeding 30 years with minimal degradation.
Check out our blog on the durability of armored fiber optic cables.
3. Protection Against Rodents
In many underground installations, especially in rural or agricultural areas, rodents pose a significant threat to fiber optic cables. These pests often chew on cables, damaging the internal fibers and disrupting the network. Armored fiber optic cables protect against this type of damage by using materials like steel or aluminum in the armor, which makes it impossible for rodents to penetrate.
This protection is critical for ensuring the longevity of the network, particularly in regions where rodents are prevalent and where other forms of protection, such as conduits, might not be enough.
Discover how armored cables prevent rodent damage in our dedicated post.
4. Cost-Effectiveness in the Long Run
While armored fiber optic cables may have a higher initial cost compared to standard cables, they offer significant savings in the long term. The enhanced protection reduces the likelihood of damage, which means fewer maintenance costs and less downtime. In the case of underground installations, the cost of replacing or repairing damaged cables can be high, especially if the cables are difficult to access.
Armored cables are built to last, which means fewer replacements and a lower total cost of ownership over time. This makes them an excellent investment for infrastructure that will be in place for decades.
How Are Armored Fiber Optic Cables Installed?
1. Planning the Route
Before installation begins, the cable route must be carefully planned. For underground installations, it’s essential to assess the area for obstacles such as rocks, other utilities, or uneven terrain that could cause problems during installation. The route should avoid areas where digging or construction activities are likely to occur frequently.
Additionally, the depth of the trench is crucial to ensure the armored cable is adequately protected from external damage. In areas with a high risk of physical pressure, a greater depth may be necessary.
Check out our installation guide for fiber optic cables.
2. Preparing the Ground
Once the route is planned, the next step is to prepare the ground. For underground installations, this involves digging a trench that is wide and deep enough to accommodate the armored cables while leaving sufficient space for the cable to be protected.
The trench should be lined with a protective layer of sand or another soft material to cushion the cable and avoid direct contact with sharp rocks or debris. In some cases, a protective conduit may be used in addition to the armor to offer even more protection against physical damage.
3. Installing the Cable
When laying the armored fiber optic cable in the trench, it’s important to handle it with care to avoid any unnecessary tension or bending that could damage the fibers inside. The cable should be laid gently into the trench, ensuring that it is positioned properly without sharp bends or kinks.
The armor layer provides the necessary strength, but it’s still important to ensure the cable isn’t subjected to excessive stress during installation. Using the correct installation tools and following the manufacturer’s guidelines will ensure that the cable remains in good condition.
Learn more about how to handle fiber optic cables during installation in our detailed guide.
4. Backfilling the Trench
After the cable is laid, the trench is backfilled with soil, and the ground is restored. The backfilling process should be done carefully to avoid damaging the cable. A final inspection should be conducted to ensure the cable is installed correctly and there are no visible issues.
Once the installation is complete, a fiber optic testing procedure should be carried out to ensure the system is working properly and that there are no signal losses or disruptions.
Read our guide on testing fiber optic cables for optimal performance.
What Are the Applications of Armored Fiber Optic Cables?
Armored fiber optic cables are incredibly versatile and can be used in a variety of applications, especially where traditional cables may not be suitable due to physical or environmental challenges. Some common applications include:
1. Underground Networks
As mentioned, armored fiber optic cables are ideal for underground installations. They are commonly used for municipal fiber optic networks, data center connections, and long-distance communication. The added protection ensures that these networks remain operational even in difficult conditions, such as rocky soil or areas prone to flooding.
2. Construction Sites
In construction zones where machinery and equipment are frequently used, armored fiber optic cables can be used to ensure that data transmission remains uninterrupted. These cables provide protection from the heavy equipment that might otherwise damage unprotected cables.
3. Industrial Settings
In industrial settings where cables are exposed to harsh conditions, including physical abuse and exposure to chemicals or high temperatures, armored fiber optic cables provide the necessary protection to ensure network stability. These cables are perfect for factory settings, manufacturing plants, and other high-risk areas.
4. Military and Defense Applications
Armored fiber optic cables are also used in military and defense applications, where security and reliability are of utmost importance. These cables provide the strength and durability needed to support critical communication infrastructure in challenging environments.
Learn about the different applications of armored fiber optic cables in various industries.
Conclusion
Armored fiber optic cables provide significant benefits for underground installations by offering enhanced protection, durability, and resistance to external threats. Whether you’re installing fiber optic cables in a construction zone, underground for citywide networks, or in industrial environments, armored cables ensure that your network will remain operational for years to come.
While the initial investment may be higher, the long-term cost savings in terms of reduced downtime, fewer repairs, and minimal maintenance make armored fiber optic cables a wise investment for any infrastructure project.
If you’re planning an underground installation, armored fiber optic cables provide the reliability, performance, and protection you need to ensure your network stays up and running smoothly.
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