UL 2420:1ED 2009-07-30

Preface
1 Scope
2 Definitions
3 Reference publications and units of measurement
  3.1 Reference publications
  3.2 Units of measurement
4 Construction
  4.1 General
  4.2 Conduit with an integral belled end
  4.3 Couplings
  4.4 Elbows
  4.5 Adapters
5 Qualification tests
  5.1 Conditioning
  5.2 Compression
  5.3 Impact resistance at low temperature
  5.4 Water absorption
  5.5 Chemical resistance (optional)
  5.6 Watertightness
  5.7 Joint separation
  5.8 Flattening resistance
  5.9 Halogen content
  5.10 Infrared spectroscopy
  5.11 Tensile strength
  5.12 Durability of printing (all types with surface-applied
       markings of ink, dyes, etc.)
6 Marking
Annex A (Normative) - Method to determine the halogen content
                      of a low-halogen material using the
                      calculation method from pH and acid
                      gas evolution
  A.1 General
  A.2 Test equipment
      A.2.1 General
      A.2.2 Equipment layout
  A.3 Test procedure
      A.3.1 Sample preparation
      A.3.2 Apparatus assembly
      A.3.3 Acid gas evolution
      A.3.4 Acid gas measurement
Annex B (informative) - Rationale for threaded adapter dimensions
                        for size 4-1/2 (116)

This revision of ANSI/UL 2420 dated April 30, 2021 includes the following: – Clarification on where to measure the minimum inside diameter of socket specified in Table 5 to Table 8 – Editorial updates to replace the reference to “CEC” with “CE Code”; 1.1, 2.4 and 3.1.1

This Standard specifies the requirements for low-halogen belowground (Type BG) reinforced thermosetting resin conduit (RTRC) and fittings, for installation and use in accordance with CSA C22.1, Canadian Electrical Code (CE Code), Part I, and NFPA 70, National Electrical Code (NEC).