Section 352.44 calls for expansion fittings to be installed where the length change in a straight run of PVC between securely mounted items such as boxes, cabinets, elbows, or other conduit terminations, in accordance with Table 347-9(A), is expected to be ¼ in. or greater. The thermal expansion characteristics of PVC rigid nonmetallic conduit is shown in Table 352.44.

In addition, this particular exposed conduit does not appear resistant to sunlight effects, as noted in 352.100, nor does it meet the "securing and supporting" requirements of 352.30.

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