MANUFACTURED WIRING SYSTEMS

604-1. Scope. The provisions of this article apply to field-installed wiring using off-site manufactured subassemblies for branch circuits, remotecontrol circuits, signaling circuits, and communication circuits in accessible areas. 604-2. Definition. Manufactured Wiring System: A system containing component parts that are assembled in the process of manufacture and cannot be inspected at the building site without damage or destruction to the assembly. 604-3. Other Articles. Except as modified by the requirements of this article, all other applicable articles of this Code shall apply. 604-4. Uses Permitted. The manufactured wiring systems shall be permitted in accessible and dry locations and in plenums and spaces used for environmental air, where listed for this application, and installed in accordance with Section 300-22. Exception: In concealed spaces, one end of tapped cable shall be permitted to extend into hollow walls for direct termination at switch and outlet points. 604-5. Uses Not Permitted. Where conductors or cables are limited by the provisions in Articles 333 and 334. 604-6. Construction. (a) Cable or Conduit Types. (1) Cable shall be listed armored cable or metal-clad cable containing nominal 600-volt No. 10 or 12 copper insulated conductors with a bare or insulated copper equipment grounding conductor equivalent in size to the ungrounded conductor. 70-642 NATIONAL ELECTRICAL CODE (2) Conduit shall be listed flexible metal conduit containing nominal 600-volt No. 10 or 12 copper insulated conductors with a bare or insulated copper equipment grounding conductor equivalent in size to the ungrounded conductor. Exception No. 1 to (1) and (2): A fixture tap maximum 6 feet (1.83 m) long intended for connection to a single fixture shall be permitted to contain conductors smaller than No. 12 but not smaller than No. 18. Exception No. 2 to (1) and (2): Conductors smaller than No. 12 shall be permitted for remote-control, signaling, or communications circuits. The assembly shall be listed for the purpose. (3) Each section shall be marked to identify the type of cable or conduit. (b) Receptacles and Connectors. Receptacles and connectors shall be locking type, uniquely polarized and identified for the purpose, and shall be part of a listed assembly for the appropriate system. (c) Other Component Parts. Other component parts shall be listed for the appropriate system. 604-7. Unused Outlets. All unused outlets shall be capped to effectively close the connector openings.