UL 1990
Standard for Nonmetallic Underground Conduit with Conductors

DETAILS
Edition Number:3SCC Approved:--
Edition Date:2013-11-22DOD Approved: --
Price Code:BANSI Approved: 2017-01-20
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover nonmetallic underground conduit with conductors. These products consist of a factory assembly of conductors or cables inside a coilable, smooth-wall, continuous length conduit with a circular cross section. The conduit is Schedule-40, Schedule-80, EPEC-A or EPEC-B High Density Polyethylene (HDPE) in trade sizes 1/2 (16) – 4 (103). This product is intended for installation in accordance with the National Electrical Code, NFPA 70. The values in parentheses are metric trade designators of conduit. The designations Schedule-40, Schedule-80, EPEC-A and EPEC-B refer to conduit having specific outside diameters and wall thicknesses.

    1.2 This product is for aboveground use where encased in not less than 2 inches (51 mm) of concrete and for underground use by direct burial or encasement in concrete.

  • TABLE OF CONTENTS
    Expand All

    • Cover
    • Transmittal
    • Table of Contents
      • Body
        • INTRODUCTION
          • 1 Scope
          • 2 Undated References
          • 3 Units of Measurement
        • CONSTRUCTION
          • 4 General
          • 5 Materials
          • 6 Dimensions
          • 7 Conductors or Cable
        • PERFORMANCE
          • 8 General
          • 9 Identification of Compounds
          • 10 Water Absorption Test
          • 11 Low Temperature Handling Test
          • 12 Tensile Strength
            • 12.1 General
            • 12.2 Preparation of specimens
            • 12.3 Conduct of the test
            • 12.4 Results
          • 13 Deflection Test
          • 14 Impact Test
          • 15 Moisture Penetration Test
          • 16 Deflection Under Heat and Load Tests
            • 16.1 General
            • 16.2 Preparation of specimens
            • 16.3 Conduct of test
            • 16.4 Results
          • 17 Direct Burial Crush Test
        • MARKINGS
          • 18 Details