I.S. HD 621:1999

PART 1 General requirements
PART 2 Additional test methods
PART 3 Impregnated paper insulated cable-single core,
       also pre-assembled
       3-A Single core draining or non-draining paper
           insulated cable - unarmoured; with or without
           thermoplastic sheath (Type 3A)
       3-B Single core cables with paper insulation,
           non-draining
       3-C Impregnated paper insulated Gables - single
           core cables
       3-E Single core cables 12/20 kV and 18/30 kV
       3-F Single core cables, also pre-assembled
       3-G Cables with paper insulation - draining -
           unarmoured - PVC or PE sheathed - single core
       3-I Cables with PE sheath
       3-J-1 Single core and SL type paper insulated cables
             with lead sheath (up to and including 12,7/22 kV)
       3-J-2 Single core and SL type paper insulated cables
             with lead sheath (19/33 kV)
PART 4 Impregnated paper insulated Gables - three core
       4-A Multicore draining or non-draining paper insulated
           cable - belted of screened cores - one or three
           metallic sheaths - armoured or unarmoured -
           thermoplastic sheath or not
       4-B Multicore cables with paper insulation, non
           draining
       4-C Impregnated paper insulated cable - belted H and
           SL type cables
       4-D Belted multicore cables with polypropylene yarn
           serving, or PVC or polyethylene sheath
       4-E Armoured three-core cables with lead sheaths
           12/20 kV and 18/30 kV and three-core cables
           12/15 kV non-radial field
       4-F Multicore Gables (Belted cables; three screened
           cores - one lead sheath; three metallic sheathed
           cores - one outer covering)
       4-G-1 Impregnated paper insulated cable - three core
             draining paper insulated cable - screened cores,
             one metallic sheath - airmoured or unarmoured
             serving, PE or PVC sheath
       4-G-2 Impregnated paper insulated Gable - three core
             draining paper insulated cable - belted, one
             metallic sheath - armoured or unarmoured serving,
             PE or PVC sheath
       4-H-1 Three-core belted and screened Gables, with lead
             sheath and steel tape armour
       4-H-2 Three-core SL steel armoured cables
       4-I Cables with one lead sheath (Type 4I-1) and with
           three lead sheaths (Type 4I-2) and with sheaths of
           PE
       4-J-1 Three core cables with lead sheath (19/33 kV)
       4-J-2 Three core cables with lead sheath, up to and
             including 12,7/22 kV
       4-J-3 Three core cables with aluminium sheath
       4-K Armoured three core Gables with lead sheaths
           and a rated voltage 23/40 kV

States the general requirements applicable to these cables, unless otherwise specified.