When it comes to industrial and commercial electrical installations, safety should always be the top priority. Electrical cables, in particular, are one of the critical components that affect the performance, efficiency, and safety of any electrical system. Thus, it is necessary to choose a reliable and durable cable that can withstand various environmental and operating conditions. This is where armored cable comes into play.
Armored cable, also known as armored wire, is a type of electrical cable that is constructed with a protective layer that provides mechanical strength, durability, and resistance to various external factors such as moisture, abrasion, chemicals, and impact. The armor layer is usually made of interlocked or corrugated steel or aluminum bands that wrap around the insulation and conductors of the cable.
In this article, we’ll delve deeper into the different aspects of armored cable, including its design, types, applications, and benefits.
Design of armored cable
As mentioned earlier, armored cable comprises a layer of metal armor that provides protection and reinforcement to the insulation and conductors of the cable. The armor layer can be of different constructions, depending on the specific requirements of the application. Some of the common designs include:
1. Interlocking Armor – This type of armor consists of two or more steel or aluminum strips that are mutually interlocked to form a helical profile. The interlocking design provides flexural strength, crush resistance, and protection against bending stress.
2. Corrugated Armor – Corrugated armor is made of continuous steel or aluminum strip that is corrugated to form a cylindrical shape. This design offers optimum crush, abrasion, and penetration resistance, making it ideal for harsh environments.
3. Wire Armor – Wire armor comprises a series of steel wires that run parallel to the conductors, providing flexibility and tensile strength.
Types of armored cable
There are different types of armored cable available in the market, each designed for specific applications. Some of the common types include:
1. Steel armored cable – Steel armored cable is the most widely used type of armored cable due to its excellent mechanical properties and durability. It is commonly used in commercial and industrial installations, including power transmission and distribution, mining, and oil and gas applications.
2. Aluminum Armored Cable – Aluminum armored cable is lightweight and corrosion-resistant, making it ideal for outdoor applications such as transportation, marine, and aerospace industries.
3. Stainless Steel Armored Cable – Stainless steel armored cable is highly resistant to corrosion and high temperatures, making it suitable for harsh environments such as chemical plants, refining facilities, and offshore platforms.
Applications of Armored Cable
Armored cable is a versatile and reliable solution for various electrical systems, ranging from low voltage to high voltage applications. Some of the common applications of armored cable include:
1. Power Transmission and Distribution – Armored cables are widely used in power transmission and distribution systems, where they carry high voltage and current from power plants to substations and from there to the end-users. The armored design provides protection against physical damage, moisture, and other environmental factors that may affect the cable’s performance.
2. Mining – The mining industry relies heavily on armored cable to power its equipment and machinery. The harsh mining environment, with its constant exposure to dust, moisture, and impact, can damage unprotected cables. Armored cables provide the durability and reliability needed to sustain the demanding mining operations.
3. Oil and Gas – The oil and gas industry operates in some of the harshest environments globally, including offshore platforms, refineries, and petrochemical plants. Armored cables are vital components in this industry, providing safe and reliable power and signal transmission in hazardous zones.
Benefits of Armored Cable
Armored cable offers several benefits, making it an ideal choice for many electrical installations. Some of the advantages of armored cable include:
1. Mechanical strength – The armor layer provides the cable with mechanical strength, allowing it to withstand physical abuse, pulling, crushing, and bending.
2. Durability – Armored cables are resistant to moisture, chemicals, abrasion, and impact, making them suitable for harsh environments.
3. Increased safety – Armored cables are designed to meet or exceed safety standards, ensuring that they operate safely and consistently in various applications.
4. Enhanced electrical performance – Armored cables have better insulation, shielding, and grounding properties than non-armored cables, reducing the risk of electrical faults, noise, and interference.
Conclusion
Armored cable is an essential component in many industrial and commercial applications, providing the mechanical strength, durability, and safety needed to withstand harsh operating conditions. Understanding the different types, designs, applications, and benefits of armored cable is critical when selecting the right cable for a particular application. Always choose an armored cable that meets the required safety standards and specifications to ensure the best performance and efficiency of your electrical system.