UL 1660
Liquid-Tight Flexible Nonmetallic Conduit

DETAILS
Edition Number:6SCC Approved:--
Edition Date:2019-01-30DOD Approved: --
Price Code:CANSI Approved: 2019-01-30
Type:ulcsance

  • SCOPE

    1 Scope

    1.1 These requirements cover liquid-tight flexible nonmetallic conduit in the 3/8 – 4 (12 – 103) trade sizes of Type LFNC-A (Layered), Type LFNC-B (Integral), and Type LFNC-C (Corrugated) constructions. The conduit is intended for installation in accordance with the National Electrical Code (NEC), the CE Code, Part 1, and the Mexican Electrical Code, NOM-001-SEDE. The values in parentheses are metric trade designators of conduit.

    1.2 Conduit covered by this Standard is intended for use in wet, dry, or oily locations at a maximum of 60°C (140°F), unless otherwise marked. (See Section 6.)

    1.3 Fittings for liquid-tight flexible nonmetallic conduit are covered in UL 514B, CSA C22.2 No. 18.3, or NMX-J-017-ANCE.

  • TABLE OF CONTENTS
    Expand All

    • Cover
    • Transmittal
    • UL Harmonized Standard Title Page
    • Table of Contents
      • Liquid-Tight Flexible Nonmetallic Conduit
        • 1 Scope
        • 2 Definitions
        • 3 General
          • 3.1 Reference publications
          • 3.2 Units of measurement
        • 4 Construction
          • 4.1 General
          • 4.2 Materials
          • 4.3 Dimensions
        • 5 Tests
          • 5.1 General
          • 5.2 Vertical flame test
          • 5.3 Flame test in cable trays – FT4 (OPTIONAL)
          • 5.4 Cold impact
          • 5.5 Resistance to deflection
          • 5.6 Tension
          • 5.7 Secureness forces
          • 5.8 Cold flexibility
          • 5.9 Deformation
          • 5.10 Mechanical water absorption test
          • 5.11 Moisture penetration
          • 5.12 Weather resistance
          • 5.13 Physical properties of separate jacket and of integral lining or jacket requirements
          • 5.14 Apparatus for conducting physical tests
          • 5.15 Durability of ink printing
          • 5.16 Direct burial stiffness
        • 6 Markings
          • 6.1 Surface
          • 6.2 Package
        • TABLES
        • FIGURES