How to install steel armoured cable in a conduit?

Installing steel armoured cable in a conduit is a crucial process in many electrical and industrial applications. As a supplier of high - quality steel armoured cables, I have witnessed firsthand the importance of proper installation to ensure the safety and efficiency of electrical systems. In this blog, I will guide you through the step - by - step process of installing steel armoured cable in a conduit.

Understanding Steel Armoured Cable

Before we dive into the installation process, it's essential to understand what steel armoured cable is. Steel armoured cables, like the SWA Steel Wire Armoured Cable, are designed to provide mechanical protection to the electrical conductors inside. The steel armour acts as a shield, protecting the cable from physical damage, such as impact, abrasion, and rodent bites. This makes them ideal for use in harsh environments, including industrial sites, outdoor installations, and underground applications.

Tools and Materials Required

To install steel armoured cable in a conduit, you will need the following tools and materials:

• Steel armoured cable: Choose the appropriate type and size of cable based on your electrical requirements.
• Conduit: Select a conduit that is compatible with the cable size and the installation environment. Common types of conduits include PVC, metal, and fiberglass.
• Cable pulling lubricant: This helps reduce friction when pulling the cable through the conduit.
• Cable pulling grips: These are used to attach the cable to the pulling equipment.
• Conduit fittings: Such as elbows, couplings, and bushings, to connect the conduit sections and protect the cable.
• Measuring tape: To measure the length of the cable and conduit.
• Hacksaw or cable cutter: For cutting the cable and conduit to the required length.
• Drill and drill bits: If you need to make holes for conduit supports or cable entries.
• Screwdriver and wrenches: For tightening conduit fittings and cable glands.

Step - by - Step Installation Process

Step 1: Plan the Installation

• Determine the route: Decide on the path the conduit will take from the power source to the destination. Avoid sharp bends and obstacles as much as possible.
• Calculate the cable length: Measure the distance along the planned route, adding some extra length for connections and future adjustments.
• Select the conduit size: The conduit should be large enough to accommodate the cable and allow for easy pulling. A general rule of thumb is that the cross - sectional area of the cable should not exceed 40% of the conduit's internal cross - sectional area.

Step 2: Install the Conduit

• Cut the conduit: Use a hacksaw or cable cutter to cut the conduit to the required lengths. Make sure the cuts are clean and straight.
• Assemble the conduit: Connect the conduit sections using the appropriate fittings. Tighten the fittings securely to prevent cable damage during pulling.
• Support the conduit: Install conduit supports at regular intervals to keep the conduit in place. The spacing of the supports depends on the type and size of the conduit.
• Make holes and entries: If necessary, drill holes in the conduit for cable entries or to attach it to a structure. Use bushings to protect the cable from sharp edges.

Step 3: Prepare the Cable

• Uncoil the cable: Carefully uncoil the steel armoured cable, making sure it is not kinked or damaged.
• Cut the cable: Measure and cut the cable to the required length, leaving some extra length for terminations.
• Attach the pulling grip: Use a cable pulling grip to attach the cable to the pulling equipment. Make sure the grip is securely fastened to prevent the cable from slipping during pulling.

Step 4: Apply Cable Pulling Lubricant

• Lubricate the conduit: Apply a generous amount of cable pulling lubricant inside the conduit. This will reduce friction and make it easier to pull the cable through.
• Lubricate the cable: Also, apply lubricant to the outer surface of the cable, especially in areas where it will come into contact with the conduit.

Step 5: Pull the Cable Through the Conduit

• Use pulling equipment: You can use a cable puller, winch, or manual pulling method to pull the cable through the conduit. Make sure the pulling force is evenly distributed and does not exceed the cable's rated pulling strength.
• Monitor the pulling process: As the cable is being pulled, keep an eye on the tension and make sure the cable is not getting stuck or damaged. If necessary, use additional lubricant or adjust the pulling equipment.

Step 6: Terminate the Cable

• Strip the cable: Carefully strip the outer sheath and armour of the cable to expose the conductors. Follow the manufacturer's instructions for proper stripping.
• Install cable glands: Use cable glands to secure the cable to the conduit and provide a seal against moisture and dust. Tighten the glands using a screwdriver or wrench.
• Connect the conductors: Connect the cable conductors to the appropriate electrical terminals or devices. Make sure the connections are tight and secure.

Other Considerations

• Safety: Always follow safety procedures when working with electrical cables and conduits. Wear appropriate personal protective equipment, such as gloves and safety glasses.
• Testing: After installation, test the cable to ensure it is functioning properly. Use a multimeter or other testing equipment to check for continuity and insulation resistance.
• Maintenance: Regularly inspect the cable and conduit for signs of damage or wear. Replace any damaged components immediately to prevent electrical failures.

Related Cable Products

In addition to steel armoured cables, we also supply other high - quality cables, such as Mining Rubber Sheathed Cable and ESP Submersible Oil Well Pump Power Cable. These cables are designed for specific applications and offer excellent performance and reliability.

Conclusion

Installing steel armoured cable in a conduit is a complex but essential process. By following the steps outlined in this blog and using the right tools and materials, you can ensure a successful installation. As a trusted steel armoured cable supplier, we are committed to providing you with high - quality products and technical support. If you have any questions about cable installation or need to purchase cables, please feel free to contact us for procurement and negotiation.

References

• Electrical Installation Handbook, Schneider Electric
• National Electrical Code (NEC)