ARTICLE 355. REINFORCED THERMOSETTING RESIN CONDUIT: TYPE RTRC


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ARTICLE 355. REINFORCED THERMOSETTING RESIN CONDUIT: TYPE RTRC
ARTICLE 355. REINFORCED THERMOSETTING RESIN CONDUIT: TYPE RTRC355.2. Definition.‚ÄÉThis is the fiberglass entry in the nonmetallic conduit market. At one time it was only permitted for below-grade applications, but advances in chemistry have resulted in materials that meet above-grade fire resistance tests and it is now permitted for use in buildings where concealed in walls, floors, and ceilings, and also where exposed if identified for the application. It is stiffer than PVC and has a much lower coefficient of thermal expansion (about 45 percent of the value for PVC). Although the NEC uses the same support distance table as for PVC conduit, it does allow for longer support intervals if the…
Citation
Frederic P. Hartwell; Joseph F. McPartland; Brian J. McPartland: McGraw-Hill's National Electrical Code 2017 Handbook, 29th Edition. ARTICLE 355. REINFORCED THERMOSETTING RESIN CONDUIT: TYPE RTRC, Chapter (McGraw-Hill Professional, 2017), AccessEngineering Export