In the postings about chain link fences, Don made a mention about expansion joints, and it got me to thinking (I know that's a dangerous proposition with me).

Here's the situation- it is a common practice in this area to run schedule 40 pvc along the frame under a mobile home for the feeder supplying the home. Some of these runs can be 50 to 60 feet long. It can get 90 degrees in the summer and as cold as -20 to -30 in the winter for a temperature swing of 110 to 120 degrees. I've never seen an expansion fitting installed in this case

In the example above, the nipple coming down from the panel cannot move & the conduit emerging from the ground into an LB is secured.

Does this installation need an expansion fitiing?

Few things are harder to put up with than the annoyance of a good example.