UL 1653
Electrical Nonmetallic Tubing

DETAILS
Edition Number:3SCC Approved:--
Edition Date:2019-02-15DOD Approved: --
Price Code:BANSI Approved: 2019-02-15
Type:ulcsance

  • SCOPE

    1 Scope

    1.1 This Standard applies to corrugated electrical nonmetallic tubing (ENT) and mechanically-attached fittings, for use in accordance with C22.1, Canadian Electrical Code, Part I (CE Code), NFPA 70, National Electrical Code (NEC) and NOM-001-SEDE, Standard for Electrical Installations (Mexico). These requirements also apply to mechanically-attached fittings integral with an outlet box.

    1.2 Products covered by this Standard are intended for use:

    a) at a maximum continuous operating temperature of 75°C (167°F);

    b) at a maximum ambient temperature of 50°C (122°F);

    c) in attics provided that the ENT is installed no higher than 900 mm (3 ft) above the bottom of the ceiling joist, and the ENT material is rated minimum 60°C (140°F); and

    d) underground (direct burial), in Canada only.

    1.3 This Standard does not apply to fittings that are intended to be joined by solvent cement. Solvent-attached fittings are covered by UL 651 or CSA C22.2 No. 211.2. Solvent-attached fittings integral with an outlet or flush device box are covered by UL 514C or CAN/CSA-C22.2 No. 85.

    1.4 For products intended for use in Canada, general requirements are given in CSA-C22.2 No. 0.

  • TABLE OF CONTENTS
    Expand All

    • Cover
    • Transmittal
    • UL Harmonized Standard Title Page
    • Table of Contents
      • Electrical Nonmetallic Tubing
        • 1 Scope
        • 2 Definitions
        • 3 General
          • 3.1 Components
          • 3.2 Reference publications
          • 3.3 Units of measurement
        • 4 Construction
          • 4.1 Compounds
          • 4.2 Physical requirements
          • 4.3 Dimensions
          • 4.4 End stops
        • 5 Performance requirements for ENT
          • 5.1 Vertical flame
          • 5.2 Bending
          • 5.3 Resistance to deflection
          • 5.4 Impact
          • 5.5 Cold bend
          • 5.6 Tension
          • 5.7 Durability of printing
          • 5.8 Solvent-attached fitting assembly
          • 5.9 Stiffness
        • 6 Performance requirements for fittings, mechanically attached
          • 6.1 Bending and pull
          • 6.2 Flame
          • 6.3 Impact
          • 6.4 Resistance to deflection – split-type couplings
          • 6.5 Concrete-tightness
        • 7 Test methods for ENT
          • 7.1 Conditioning
          • 7.2 Vertical flame (500 W burner)
          • 7.3 Flame test in cable trays – FT4 (Optional)
          • 7.4 Bending
          • 7.5 Resistance to deflection
          • 7.6 Impact
          • 7.7 Cold bend
          • 7.8 Tension
          • 7.9 Durability of printing
          • 7.10 Solvent-attached fitting assembly
        • 8 Test methods for fittings, mechanically attached
          • 8.1 Bending and pull
          • 8.2 Flame
          • 8.3 Impact
          • 8.4 Resistance to deflection – split-type couplings
          • 8.5 Concrete-tightness
        • 9 Marking
        • TABLES
        • FIGURES