Which material is recommended for dusting electrical cables to reduce damage during installation in rigid conduit?

Using powdered soapstone for dusting electrical cables in a rigid conduit is recommended because it has properties that help reduce friction and wear on the cables during installation. Soapstone is a soft, lump-like mineral that creates a protective layer, allowing cables to glide smoothly through the conduit without damage. The non-abrasive nature of soapstone ensures that it doesn’t scratch or harm the cable’s insulation, which could be detrimental to the integrity of the electrical system.

In contrast, materials such as powdered graphite and silicone lubricant might not be ideal in this scenario. Graphite is a conductive substance and could potentially create unwanted electrical paths if it finds its way onto exposed conductors. Dielectric grease, while useful for protecting electrical connections from moisture, can be viscous and may not provide the dry, smooth application that soapstone offers during the installation process. Thus, soapstone is favored for its effectiveness in maintaining the integrity and safety of electrical cables when being installed in rigid conduit.