Hint: Problematic pole wiring.
The rigid PVC conduit installed on this pole does not seem so rigid where it is bending off the pole. One of the causes for this is the fact that there is no PVC expansion fitting installed on this riser. Section 352.44 requires expansion fittings to be used where the length change due to thermal expansion and contraction is ¼ in. or greater in accordance with Table 352.44(A) in straight runs between securely mounted items such as boxes, enclosures, and elbows. An outside run this long would most likely experience a length change greater than ¼ in. since the temperature change in this New England location could easily be 100°F or more! Another noticeable problem is the lack of clips on this run. There are not nearly enough clips installed here. Table 352.30(B) requires clips or other supports for Rigid PVC conduit in sizes ½ in. through 1 in. to be space at intervals not exceeding 3 ft.
