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When doing conduit fill calculations, is multi-conductor/pair cable considered 1 wire or more than 2 wires?

Question asked by vsulaiman on Mar 1, 2017

Got some feedback from a construction contractor that an 8PR cable with an OD of .72" does not fit in a 1" RGS conduit. I did my calcs to ensure that it does. Maybe they're counting every pair as a wire? If bundled together, is a multi-conductor/pair cable considered as "1 wire, 53% fill" or "Over 2 Wires, 40% fill"?