Q. What is the Code rule for the securing and supporting of PVC raceways? Answer based on 2011 NEC.
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A. PVC conduit must be securely fastened and supported in accordance with the following [352.30]:
• PVC conduit must be secured within 3 ft of every box, cabinet, or termination fitting, such as a conduit body [352.30(A)].
• PVC conduit must be supported at intervals not exceeding the values in Table 352.30, and the raceway must be fastened in a manner that permits movement from thermal expansion or contraction.
• PVC conduit installed horizontally in bored or punched holes in wood or metal framing members, or notches in wooden members, is considered supported, but the raceway must be secured within 3 ft of termination [352.30(B)].