Resolución 2535: adopta el Código Eléctrico Nacional, versión 1993. (Sustituye el Anejo A del Reglamento 4435)

Type MC cable shall be permitted for systems in excess of 600 volts, nominal. See Section 300-2(a). 334-3. Uses Permitted. Except where otherwise specified in this Code and where not subject to physical damage, Type MC cables shall be permitted as follows: (1) for services, feeders, and branch circuits; (2) for power, lighting, control, and signal circuits; (3) indoors or outdoors; (4) where exposed or concealed; (5) direct buried where identified for such use; (6) in cable tray; (7) in any approved raceway; (8) as open runs of cable; (9) as aerial cable on a messenger; (10) in hazardous (classified) locations as permitted in Articles 501, 502, 503, and 504; (11) in dry locations; and (12) in wet locations where any of the following conditions are met: (1) The metallic covering is impervious to moisture. (2) A lead sheath or moisture-impervious jacket is provided under the metal covering. (3) The insulated conductors under the metallic covering are approved for use in wet locations. Exception: See Section 501-4(b), Exception. (FPN): See Section 300-6 for protection against corrosion. 334-4. Uses Not Permitted. Type MC cable shall not be used where exposed to destructive corrosive conditions, such as direct burial in the earth, in concrete, or where exposed to cinder fills, strong chlorides, caustic alkalis, or vapors of chlorine or of hydrochloric acids. Exception: Where the metallic sheath is suitable for the conditions or is protected by material suitable for the conditions. B. Installation 334-10. Installation. Type MC cable shall be installed in compliance with Articles 300, 710, and 725 as applicable. (a) Support. Type MC cable shall be supported and secured at intervals not exceeding 6 feet (1.83 m). Exception No. 1: Where installed as branch circuits in dwelling units, Type MC cable shall be secured within 12 inches (305 mm) from every outlet box, junction box, cabinet, or fitting. Exception No. 2: Where Type MC cable is fished. (b) Cable Tray. Type MC cable installed in cable tray shall comply with