Article 344. Rigid Metal Conduit

Part I. General

344.2 Definition

RMC is a listed metal raceway of circular cross section with integral or associated couplings, listed for the installation of electrical conductors and used with listed fittings to provide electrical continuity.

Part II. Installation

344.20 Trade Size

(A) Minimum. Trade size ½.(B) Maximum. Trade size 6.

344.30 Secured and Supported

(A) Securely Fastened.

344.30 Secured and Supported

(B) Supports.(1) RMC must be supported at intervals not

exceeding 10 ft.

344.30 Secured and Supported

(B) Supports.(2) Straight Horizontal Runs.

344.30 Secured and Supported

(B) Supports.(3) Vertical Risers.

344.30 Secured and Supported

(C) Unsupported Raceways.

344.42 Couplings and Connectors

(B) Running Threads.

344.46 Bushings