(A) Open wiring prohibited. Open wiring (wiring on porcelain knobs or cleats) is prohibited except in locations where excessive moisture exists, or the installation of other approved forms of construction is impracticable. For exposed wiring, wires shall, (except by special permit from the Public Works Director) be installed in standard conduit, armored cable, or metal raceways. For concealed wiring, wires shall be installed in standard conduit or armored cable, except by special permit from the Public Works Director.
(B) Conduits, raceways, junction boxes, and the like. When rigid conduit is used, the tube and all elbows, bends, couplings, and similar fittings shall be made of noncorrodible conduit or (excluding threads and joints) be protected by an approved coating of corrosion resistant material. When flexible conduit is used it shall be similarly protected against corrosion. Conduits shall be installed as a complete system without the wires, and shall be continuous from outlet to outlet, and from fitting to fitting, and the ends of conduits shall be threaded and reamed before installation and shall be mechanically and electrically connected to all fittings. All ends and connections shall be reamed so as to protect the wires from abrasion. Flexible cords shall be used only for pendants, wiring of fixtures, and portable devices. At each outlet, switch, or junction of conduit, metal raceway, or cable, an approved box shall be installed and the box shall be protected with a cover unless a fixture canopy is present. Junction boxes shall be so installed that the wiring contained in them may be readily accessible. All metallic conduit, armored cable, or metallic raceways shall be grounded as protective measure. The conduit for grounding shall be noncorrodible material.
(1977 Code, § 3-15-10) Penalty, see § 10.99