A main conduit should enter the _____ of a manhole.

A main conduit should enter the end walls of a manhole to ensure efficient and effective routing of the cable or fiber optic lines that will be placed within the conduit. This positioning allows for smooth transitions as conduits connect from one location to another, minimizing disruptions in the cable pathway.

When the conduit enters through the end walls, it facilitates a straightforward alignment for subsequent cables that will be run through the manhole. Additionally, this method helps manage the bends and curves that may be required when the conduit transitions into the manhole from the outside. The side walls are generally intended for access points or additional conduits, while the top and base of the structure would not provide the same routing efficiency and could lead to issues related to water intrusion or dirt accumulation. Thus, using the end walls is optimal for maintaining the integrity and functionality of the outside plant infrastructure.