This Architectural Drawing is AutoCAD 2d drawing of Details of Anaconda conduit in AutoCAD, dwg file. Metal. Rigid metal conduit (RMC) is a thick-walled threaded tubing, usually made of coated steel, stainless steel or aluminum. Galvanized rigid conduit (GRC) is galvanized steel tubing, with a tubing wall that is thick enough to allow it to be threaded. For =more details and information download the drawing file.