NEMA PRP 3-2009 (R2020) addresses the effect of thermal expansion and contraction on long, straight runs of conduit. For this application, O-ring expansion fittings are used to accommodate changes in length.
NEMA PRP 3-2009 (R2020)
Original price was: $49.00.$24.00Current price is: $24.00.
Expansion Epoxy Based Fittings for RTRC Rigid Nonmetallic Conduit
National Electrical Manufacturers Association , 2010
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