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does 2011 nec code book require the use of expansion joints on any pvc conduit run or just pvc in the ground? |
352.44 Expansion Fittings. Expansion fittings for PVC
conduit shall be provided to compensate for thermal expansion
and contraction where the length change, in accordance
with Table 352.44, is expected to be 6 mm (1?4 in.) or greater in
a straight run between securely mounted items such as boxes,
cabinets, elbows, or other conduit terminations.
Source: http://www.diychatroom.com/f18/use-expansion-joints-134236/
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