As indicated by these two photos, when PVC thermal expansion and contraction is not taken into consideration when designing and installing PVC conduit runs, the pipe run can simply self-destruct.

In both residential and commercial buildings, heating and cooling cycles can take a toll on piping systems. When pipes expand due to heat and contract when they cool, they stress joints, supports, and ...

I think one contributing factor for this rigid PVC conduit being snapped apart was the lack of an expansion fitting on this conduit run. Section 352.44 requires ...