What can be done to reduce the possibility of damage to long lengths of electrical cable being pulled through rigid conduit?

Dusting the cable with powdered soapstone is an effective method for reducing the possibility of damage to long lengths of electrical cable being pulled through rigid conduit. The soapstone acts as a lubricant, minimizing friction between the cable and the conduit. When cables are pulled through conduit, they can encounter resistive forces that lead to wear and tear. The addition of a lubricant helps the cable slide more easily, reducing the risk of shearing the insulation or damaging the conductor itself.

This method is particularly valuable when dealing with long runs, where the cumulative friction can become significant. Lubrication is a standard practice in electrical installations to enhance the overall integrity of the system, ensuring that cables do not suffer damage during installation.

In contrast, other options may not effectively address the issue. Thicker cables could make pulling more difficult and increase the potential for damage due to higher friction. Coiling the cable tightly could also lead to tangling or kinking, which is detrimental to the cable's integrity. Applying heat to the conduit may soften materials and lead to warping or damage rather than facilitating a smoother pull. Thus, using powdered soapstone emerges as a reliable and practical solution.