What is the main purpose of using reamed ends in rigid conduit?

The main purpose of using reamed ends in rigid conduit is to ensure safety from sharp edges. When conduit is cut, the cut ends can often be jagged and sharp, posing a risk of injury to anyone handling the conduit as well as potentially damaging cables or wires that are pulled through the conduit.

Reaming the ends smooths out these edges, which not only reduces the risk of cuts but also prevents potential wear and tear on insulation over time. This practice significantly contributes to the overall safety of the installation, as well as maintaining the integrity of the electrical system.

While other options such as improving electrical conductivity, aligning better with connections, or facilitating installation have their own merits in different contexts, the primary function of reaming in this case directly pertains to safety considerations.