IEC 61950:2007

FOREWORD
1 Scope
2 Normative references
3 Terms and definitions
4 General requirements
  4.1 Tests
  4.2 Metallic materials
  4.3 Non-metallic materials
  4.4 Construction
  4.5 Box connectors
  4.6 Screws
  4.7 Lock-nuts
  4.8 Classifications
  4.9 Marking
5 Fittings for specific wiring systems
  5.1 Types
  5.2 Fittings for threaded EHDERS conduit
  5.3 Fittings for unthreaded EHDERS conduit
  5.4 Bushings
  5.5 Fittings for closure of openings
  5.6 Service-entrance heads
  5.7 Fittings and bushings for armoured cable
  5.8 Fittings for non-metallic-sheathed cable
  5.9 Fittings for mineral-insulated cable
  5.10 Nipples
  5.11 Mesh grips (pulling and strain relief)
  5.12 Reducing washers
6 Cast metal boxes and conduit bodies
  6.1 General
  6.2 Materials
  6.3 Threads, internal and external
  6.4 Concrete-tightness
  6.5 Rain-tightness
  6.6 Marking
7 Specific types of cast metal boxes and conduit bodies
  7.1 Types
  7.2 Device boxes (FS and FD) and covers
  7.3 Outlet box covers
  7.4 Junction and pull boxes and covers
  7.5 Conduit bodies and covers
8 Marking
  8.1 General
  8.2 Fittings for non-metallic-sheathed cable
  8.3 Insulating bushings
  8.4 Bushings for armoured cable
  8.5 Mesh grips
  8.6 Tray cable fittings
  8.7 Flexible cord fittings
  8.8 Conduit bodies
  8.9 Fittings for threaded hubs
  8.10 Fittings for armoured cable, aluminium-sheathed
       cable and metal-clad cable
  8.11 Fittings for service-entrance cable
  8.12 Fittings for mineral-insulated cable
  8.13 Expansion fittings
9 Type tests
  9.1 General
  9.2 Concrete-tightness test
  9.3 Rain-tightness test
  9.4 Flammability test
  9.5 Electrical continuity test
  9.7 Volume measurement
  9.8 Tests for temperature ratings of insulating material
       used for bushings or insulating liners
  9.9 Elastomeric materials deterioration test
  9.10 Wire pull test
  9.11 Metallic-coating thickness test
  9.12 Liquid-tight fittings for EHDERS
  9.13 Threaded fittings for EHDERS
  9.14 Hubs
  9.15 Fittings for armoured cable
  9.16 Bushings for armoured cable
  9.17 Fittings for metal-clad (MC) cable
  9.18 Fittings for aluminium sheathed cable
  9.19 Fittings for mineral-insulated (MI) cable
  9.20 Fittings for nonmetallic-sheathed cable
  9.21 Fittings for service-entrance cable
  9.22 Fittings for flexible cord
  9.23 Fittings for tray cable
  9.24 Expansion fittings
  9.25 Gaskets - expanded closed cell materials
  9.26 Mesh grips (pulling and strain-relief grips)
  9.27 Reducing washers electrical continuity test
  9.28 Permanence of markings test
Bibliography

This International Standard specifies requirements for conduit and cable fittings including cast metal boxes and conduit bodies used with extra-heavy duty electrical rigid steel (EHDERS) conduit conforming to IEC 60981. This edition constitutes a technical revision. It incorporates numerous additional tables which are significant changes to the first edition including: revision and update; new requirements necessitated by the proliferation of communication cables used in connection with EHDERS conduits and fittings