LIQUIDTIGHT FLEXIBLE CONDUIT

70-259 (2) Where protection of the contained conductors is required from vapors, liquids, or solids; (3) For outdoor locations where listed and marked as suitable for the purpose. (FPN): For marking requirements, see Section 110-21. (4) For direct burial where listed and marked for the purpose. (b) Not Permitted. Liquidtight flexible nonmetallic conduit shall not be used: (1) Where subject to physical damage; (2) Where any combination of ambient and conductor temperatures is in excess of that for which the liquidtight flexible nonmetallic conduit is approved; (3) In lengths longer than 6 feet (1.83 m). Exception: Where longer length is essential for a required degree of flexibility. (4) Where voltage of the contained conductors is in excess of 600 volts, nominal. Exception: As permitted in Section 600-31(a), Exception for electric signs over 600 volts. 351-24. Size. The sizes of liquidtight flexible nonmetallic conduit shall be electrical trade sizes ½ inch to 4 inch inclusive. Exception No. 1: ³/₈-inch size for enclosing the leads of motors as permitted in Section 430-145(b). Exception No. 2: ³/₈-inch trade size shall be permitted in lengths not in excess of 6 feet (1.83 m) as a part of a listed assembly, for tap connections to lighting fixtures as required in Section 410-67(c), or for utilization equipment. See Table 350-3 for conduit fill. Exception No. 3: ³/₈-inch trade size for electric sign conductors on insulators in accordance with Section 600-31(a). 351-25. Number of Conductors. The number of conductors permitted in a single conduit shall be in accordance with the percentage fill specified in Table 1, Chapter 9. 351-26. Fittings. Liquidtight flexible nonmetallic conduit shall be used only with terminal fittings identified for such use. Angle connectors shall not be used for concealed raceway installations. 351-28. Equipment Grounding. Where an equipment grounding conductor is required for the circuits installed in liquidtight flexible nonmetallic conduit, it shall be permitted to be installed on the inside or outside of the conduit. Where installed on the outside, the length of the equipment grounding conductor shall not exceed 6 feet (1.83 m) and shall be routed with the raceway or enclosure. Fittings and boxes shall be bonded or grounded in accordance with Article 250. 70-260 NATIONAL ELECTRICAL CODE 351-29. Splices and Taps. Splices and taps shall be made only in junction boxes, outlet boxes, device boxes, or conduit bodies. See Article 370. 351-30. 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.