What should be used for ease of pulling the conductor when bends are required?

Using larger size conduits is advisable for ease of pulling the conductor when bends are required because increased conduit size reduces friction and allows for smoother navigation around bends. The additional space within a larger conduit accommodates the conductor's movement and mitigates stress that can occur during installation. This is particularly important in scenarios involving multiple bends or longer runs, as narrower conduits may create tight corners that can hinder the pulling process and potentially damage the conductor.

While other choices do exist, they do not facilitate the same level of ease in conductor installation. Flexible tubing may offer some adaptability but lacks the structural support needed for standard applications. Smaller size conduits can increase friction and make it more difficult to maneuver the conductor, while standard size conduits may not provide enough room under challenging installation conditions. Hence, larger conduits are generally the most effective option in ensuring reliable and efficient installation.