You also must support PVC within 3 feet of any conduit termination, such as an outlet box or junction box. You won’t believe how much PVC expands and contracts in the heat and cold, respectively.

As noted in Sec. 352.30(A), "PVC conduit shall be securely fastened within 3 ft of each outlet box, junction box, device box, conduit body, or other conduit termination. Conduit listed for securing at ...