When installing underground entrances, no more than ________ 90-degree bends should be included between pulling points.

Limiting to only one 90-degree bend is overly restrictive and does not reflect standard installation practice, which permits two bends between pull points.

Limiting bends to two 90-degree turns between pull boxes or pulling points keeps cumulative friction and sidewall pressure within acceptable limits during cable installation. Exceeding two 90-degree bends increases pulling tension exponentially, risking cable jacket damage, conductor deformation, or the need for excessive pulling force that can compromise the cable's performance specifications.

Three 90-degree bends between pulling points would create excessive cumulative friction and pulling tension, violating standard conduit fill and installation guidelines.

Four 90-degree bends between pulling points would make cable pulling extremely difficult and could cause cable damage, far exceeding accepted installation standards.