| Part | Description |
| HD620 Part 1 | General requirements for cables |
| HD620 Part 2 | Spare |
| HD620 Part 3 | Spare |
| HD620 Part 4 | Spare |
| HD620 Part 5 & Part 6 | Combined as new Part 10 |
| HD620 Part 7 & Part 8 | Combined as new Part 11 |
| HD620 Part 9 | HEPR (Hard Ethylene Propylene Rubber) insulated single core cables, and single core pre-assembled cables |
| HD620 9-E | Cables with Polyolefin compound sheath (Types 9E-1, 9E-3, 9E-4, and 9E-5) |
| HD620 9-I | Cables with HEPR insulation and PVC sheath, single core |
| HD620 Part 10 | XLPE (Cross-linked Polyethylene) insulated single core and 3 core cables, and single core pre-assembled cables |
| HD620 10-A | Cables with XLPE (Cross-linked Polyethylene) insulation: PE or PVC sheath |
| HD620 10-B | Cables with XLPE insulation: PE or PVC or Polyolefin compound sheath |
| HD620 10-C | Cables with XLPE insulation: PE or PVC sheath |
| HD620 10-D | Cables with XLPE insulation: PE or PVC or Polyolefin sheath |
| HD620 10-E | Cables with Polyolefin compound sheath (Types 10E-1, 10E-2, 10E-4, and 10E-5) |
| HD620 10-F (Type 10F-1) | Single core cables with PVC sheath (Type 10F-1) |
| HD620 10-F (Type 10F-2) | Single core cables with PE sheath laid up (Type 10F-2) |
| HD620 10-F (Type 10F-3) | Cables with PE sheath, laid-up around bare earth conductor (Type 10F-3) |
| HD620 10-F (Type 10F-4) | Cables with aluminium conductors and PE sheath, laid-up around a steel messenger (Type 10F-4) |
| HD620 10-F (Type 10F-5) | Cables with solid aluminium conductors and PE sheath, laid-up (Type 10F-5) |
| HD620 10-F (Type 10F-6) | Cables with aluminium conductors and PE sheath, laid-up around an insulated steel messenger (Type 10F-6) |
| HD620 10-F (Type 10F-11) | Cables with common PVC sheath and individual copper screen (Type 10F-11) |
| HD620 10-F (Type 10F-12) | Cables with common PE sheath and individual copper screen (Type 10F-12) |
| HD620 10-F (Type 10F-13) | Cables with common PE sheath and common copper screen (Type 10F-13) |
| HD620 10-F (Type 10F-14) | Cables with common PVC sheath and common copper sheath (Type 10F-14) |
| HD620 10-G (Type 10G-1) | Cables with PVC or PE sheath, laid-up (Type 10G-1) |
| HD620 10-G (Type 10G-2) | Cables with PVC or PE sheath, laid-up around a messenger (Type 10G-2) |
| HD620 10-G (Type 10G-3) | Cables with PVC or PE sheath, not laid-up (Type 10G-3) |
| HD620 10-G (Type 10G-4) | Cables with PVC or PE sheath, laid-up (Type 10G-4) |
| HD620 10-G (Type 10G-5) | Cables with PVC or PE sheath, not laid-up (Type 10G-5) |
| HD620 10-I1 | Triplex formation medium voltage cables, aluminium conductor with XLPE insulation of reduced thickness, aluminium tape screen, and PE outer sheath for direct burial |
| HD620 10-I2 | Triplex formation medium voltage cables, aluminium conductor with XLPE insulation of reduced thickness, aluminium tape screen, and PE sheath, laid-up around an aluminium clad steel messenger |
| HD620 10-I3 | Triplex formation medium voltage cables, aluminium conductor with XLPE (Cross-linked Polyethylene) insulation of reduced thickness, aluminium tape screen, and PE outer sheath with improved impact performance |
| HD620 10-J | Single core and three core cables with PE sheath (Type 10J-1) or PVC sheath (Type 10J-2) or PVC-flame retardant sheath (Type 10J-3) |
| HD620 10-K | Cables with PE sheath (Type 10K-1) or PVC sheath (Type 10K-2) |
| HD620 10-L | Cables with PVC sheath, laid-up (Type 10L-1) or not (Type 10L-2) around an additional conductor |
| HD620 10-M | Single and three core cables with PE sheath (Type 10M-1) and PVC sheath (Type 10M-2) |
| HD620 10-N | Cables with PE sheath (Type 10N) |
| HD620 10-O | XLPE insulated cables: 11kV and 33kV copper wire screened with PE or Polyolefin sheath, and 33kV lead sheathed with PE outer sheath |
| HD620 10-P | Cables with PVC sheath laid-up around an earth conductor (Type 10P-1 and Type 10P-2), and cables with PVC sheath laid-up around a messenger (Type 10P-3) |
| HD620 Part 11 | EPR (Ethylene Propylene Rubber) single core and 3 core cables |
| HD620 11-N | EPR insulated cables with PE sheath (Type 11N) |
| HD620 11-O | EPR insulated cables: 11kV and 33kV copper wire screened with PE or Polyolefin sheath |
Source : HD620 Cable Code References (https://www.elandcables.com/electrical-cable-and-accessories/cables-by-standard/hd-620-cable)