Why is conduit reamed primarily?

Reaming conduit is primarily done to protect wires against sharp edges. When conduit is cut to length, it can often leave sharp edges at the cut ends. If these edges are not smoothed out, they pose a risk of damaging the insulation on the wires that will be run through the conduit. This insulation is crucial for ensuring that the wires operate safely and effectively without short-circuiting. By reaming the conduit, the sharp edges are removed, providing a smoother path for the wires and thereby enhancing their protection during installation and throughout their operational life.