Patent ID: 7696435

Claim:
A first rigid conduit member suitable for constructing an electrical raceway adapted for installation of an electrical conductor therethrough, said conduit member comprising: a rigid tubing having an interior surface and an exterior surface, said exterior surface comprising a hard plastic and said interior surface comprising unthreaded ferrous or nonferrous thinwall of circular cross section, wherein at a first end of said rigid tubing, said hard plastic forms an interior surface of a configuration defining a smooth female fitting, wherein at a second end of said rigid tubing an exterior surface of said hard plastic is configured in a manner defining a smooth male fitting, and wherein said first end of said rigid tubing is adapted to be received by and joined to a second conduit member having a smooth male fitting of hard plastic and said second end of said rigid tubing is adapted to be received by and joined to a third conduit member having a smooth female fitting of hard plastic.