Please note: All interim revisions for this edition available at time of your purchase will be included.

This is the First Edition of UL 2420, the common CSA and UL (binational) standard for Belowground Reinforced Thermosetting Resin Conduit (RTRC) and Fittings covering requirements for Canada and the United States.

1 Scope

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 (CEC), Part I, and NFPA 70, National Electrical Code (NEC).

1.2 The products specified in this Standard are intended for use at -40°C (-40°F) to 110°C (230°F).

1.3 Type BG conduit has not been evaluated for directional boring applications.

1.4 This Standard covers ID (dimensions based on inside diameters) and IPS (dimensions based on outside diameters of iron pipe sizes) conduit and fittings. Trade sizes (metric designators) are 1/2 (16) to 6 (155).Note: The values in parenthesis are metric size designations of conduits and fittings and do not necessarily reflect metric trade sizes

1.5 This Standard covers conduit with designations EB (encased burial) and DB (direct burial), which refer to specific wall thicknesses. EB conduit, is suitable for encasement in concrete. DB conduit is suitable for encasement in concrete and direct burial.

1.6 Fittings specified in this Standard include, but are not limited to, straight couplings, 5° angle couplings, adapters, and elbows with plain ends or integral belled ends at one or both ends.