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

350-5. Grounding. Flexible metal conduit shall be permitted as a grounding means as covered in Section 250-91(b). Where an equipment bonding jumper is required around flexible metal conduit, it shall be installed in accordance with Section 250-79. Exception No. 1: Where used to connect equipment where flexibility is required, an equipment grounding conductor shall be installed. Exception No. 2: Listed flexible metal conduit shall be permitted as a grounding means if the total length in any ground return path is 6 feet (1.83 m) or less, the conduit is terminated in fittings listed for grounding, and the circuit conductors contained therein are protected by overcurrent devices rated at 20 amperes or less. 350-6. Bends - Number in One Run. There shall not be more than the equivalent of four quarter bends (360 degrees total) between pull points, e.g., conduit bodies and boxes. 350-7. Number of Conductors. The number of conductors permitted in a single 1/2-inch through 4-inch trade size shall not exceed the percentage of fill specified in Table 1, Chapter 9. See Table 350-3 for ³/₈-inch flexible metal conduit. 350-8. Fittings. Fittings listed for flexible metal conduit shall be used. Angle connectors shall not be used for concealed raceway installations. 350-9. Trimming. All cut ends of conduit shall be trimmed or otherwise finished to remove rough edges, except where fittings that thread into the convolutions are used. 350-10. Splices and Taps. Splices and taps shall be made only in junction boxes, outlet boxes, device boxes, or conduit bodies.