UL 493
Standard for Thermoplastic-Insulated Underground Feeder and Branch-Circuit Cables

DETAILS
Edition Number:9SCC Approved:--
Edition Date:2007-06-01DOD Approved: --
Price Code:BANSI Approved: 2016-10-26
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover 14 – 4/0 AWG single-conductor PVC-insulated and -jacketed underground feeder and branch-circuit cable and flat multiple-conductor PVC-jacketed underground feeder and branch-circuit cables containing two or three 14 – 6 AWG PVC-insulated circuit conductors with or without a grounding conductor. These Type UF cables are intended for use in accordance with Article 340 and other applicable parts of the National Electrical Code,ANSI/NFPA-70 in wiring systems operating at a potential of 600 V or less. Submersible water-pump cables and multiple-conductor assemblies to which a type-letter designation is not assigned are also covered in these requirements.

    1.2 Multiple-conductor cable that is marked "UF-B" has a 75°C (167°F) jacket and conductors with insulation of 90°C (194°F) dry and at least 60°C (140°F) wet locations. Multiple-conductor cable that is marked "UF" has a 60°C (140°F) jacket and conductors with insulation for 60°C (140°F) dry and wet locations. Single-conductor cable is marked "UF" and has an integral insulation and jacket for 60°C (140°F) dry and wet locations. The ampacity of all cables covered in these requirements is that of 60°C (140°F) conductors.

    1.3 These requirements do not cover insulation other than PVC, round cables containing two or more circuit conductors, flat cables containing more than three circuit conductors, or multiple-conductor cables containing circuit conductors larger than 6 AWG .

  • TABLE OF CONTENTS
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    • Cover
    • Transmittal
    • Table of Contents
      • Body
        • INTRODUCTION
          • 1 Scope
          • 2 Units of Measurement
          • 3 References
        • CONSTRUCTION
          • 4 General
          • 5 Conductors
          • 6 Insulation
          • 7 Assembly of Multiple-Conductor Cables
            • 7.1 General
            • 7.2 Circuit conductors
            • 7.3 Grounding conductor
          • 8 Outer Covering on Multiple-Conductor Cables
          • 9 Assemblies That Include Single-Conductor Type UF Cables
          • 10 Submersible Water-Pump Cable Constructions
        • PERFORMANCE
          • 11 Separability
          • 12 Continuity
          • 13 Vertical Flame Test
          • 14 Vertical-Tray Flame Test
          • 15 Dielectric Voltage-Withstand Test
          • 16 Tension and Elongation Test
          • 17 Unwinding Test at Low Temperature
            • 17.1 General
            • 17.2 Preparation of specimens
            • 17.3 Test equipment
            • 17.4 Conduct of the test
            • 17.5 Results
          • 18 Conductor Pullout Test
          • 19 Stability of Configuration Test
          • 20 Impact Test
          • 21 Crushing Resistance Test
          • 22 Flow Test
          • 23 Sunlight Resistance Test
        • MARKINGS
          • 24 Details
    • Superseded List