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HTA CIS twisted pair cable for reliable underground transmission.
NFC-compliant cable with UV and moisture-resistant jacket.
Perfect for underground MV control and signaling systems.
Durable twisted pair cable designed for harsh buried conditions.
High-performance HTA CIS cable – stable signal, long service life.
These HTA CIS Underground Twisted Pair NFC 33-226 cables are suitable for medium-voltage public power distribution from 6/10kV to 18/30kV. They are used for power distribution under normal conditions in overhead installations.The three-phase cables are wound around a messenger consisting of a steel core with a cross-section of 50mm² and an outer insulation with a nominal thickness of 1.2mm. The galvanized steel strands have a minimum breaking load of 64,700N.
CONSTRUCTION
• Conductor
Aluminum,Class 2 stranded circular / Circular compacted
• Semi-Conductive Layer for Conductor
Semi-conductive material
• Insulation
XLPE (Cross-Linked Polyethylene)/TR-XLPE (Tree-Retardant Cross-Linked Polyethylene)
• Semi-Conductive Layer for Insulation
Semi-conductive material
• Metallic Screen
Copper wires / Copper Tape / Copper Wire & Tape
• Outer Sheath
HDPE(High-density polyethylene)
• Support Conductor
Galvanized steel wires
• Rated Voltage
3.6/6kV(7.2kV),6/10k (11kV),8.7/15kV(17.5kV),12/20kV(24kV),18/30kV(36kV)
| Category | Technical Description | Typical Applications |
| Standard | NFC 33-226 – French standard for underground medium-voltage twisted pair cables (CIS: Conducteurs Isolés Souterrains) | Used in MV distribution networks in France and French-speaking countries |
| Cable Type | HTA CIS – Underground twisted pair of XLPE-insulated, screened conductors | Suitable for 11 kV – 33 kV underground installations |
| Conductor Material | Stranded copper or aluminum, Class 2 (IEC 60228) | Ensures high conductivity and flexibility |
| Insulation | High-performance XLPE (Cross-linked Polyethylene) – rated for 90°C continuous operation | Excellent thermal and dielectric behavior |
| Twisting Configuration | Two single-core insulated cables twisted together (also called “twisted single-core pair”) | Improves electromagnetic balance and eases jointing |
| Screening | Each core is screened with copper tape or wires, plus semi-conductive layers for field control | Reduces EMF, allows safe grounding, and supports fault detection |
| Outer Sheath | UV-, water-, and corrosion-resistant HDPE or PVC, depending on installation conditions | Suitable for direct burial in harsh soil environments |
| Voltage Range | Typically 12/20 kV, 18/30 kV, and 21/35 kV | MV underground distribution, substation links |
| Fire Performance | Available with flame retardant / LSZH sheath on request | For sensitive urban or tunnel environments |
| Standards Compliance | NFC 33-226- IEC 60502-2 (reference)- CENELEC HD 620 (partial alignment) | Ensures compatibility with ERDF/Enedis and French utility networks |
| Identification | Cores are color-marked or numbered; cable often comes with traceability marking on sheath | Helps in accurate installation & maintenance |
NFC 33-226
| Medium Voltage Overhead Cables | |||||||||
| No.of cores and nominal cross section |
Phase | Messenger | Approx. overall diameter | Approx weight | Max.DC resistance ofconductor at 20℃ |
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| Min. Number Ofwires |
Nominal insulation thickness | Nominal AL/PET tape thickness | Nominal sheath thickness |
Conductor | Nominal insulation thickness | ||||
| mm² | No. | mm | mm | mm | No./mm | mm | mm | kg/km | Ω/km |
| 6/10(12)kV | |||||||||
| 3x1x50+1x50 | 6 | 3.4 | 0.2 | 2 | 7/3.0 | 1.2 | 49.9 | 1948 | 0.641 |
| 3x1x70+1x50 | 12 | 3.4 | 0.2 | 2 | 7/3.0 | 1.2 | 53.6 | 2239 | 0.443 |
| 3x1x95+1x50 | 15 | 3.4 | 0.2 | 2 | 7/3.0 | 1.2 | 57.5 | 2579 | 0.32 |
| 3x1x120+1x50 | 15 | 3.4 | 0.2 | 2 | 7/3.0 | 1.2 | 60 | 2859 | 0.253 |
| 3x1x150+1x50 | 15 | 3.4 | 0.2 | 2 | 7/3.0 | 1.2 | 63.3 | 3182 | 0.206 |
| 3x1x185+1x50 | 30 | 3.4 | 0.2 | 2 | 7/3.0 | 1.2 | 67 | 3599 | 0.164 |
| 3x1x240+1x50 | 30 | 3.4 | 0.2 | 2 | 7/3.0 | 1.2 | 71.9 | 4233 | 0.125 |
| 3x1x300+1x50 | 30 | 3.4 | 0.2 | 2 | 7/3.0 | 1.2 | 76.7 | 4889 | 0.1 |
| 3x1x400+1x50 | 53 | 3.4 | 0.2 | 2.2 | 7/3.0 | 1.2 | 83.4 | 5852 | 0.0778 |
| 3x1x500+1x50 | 53 | 3.4 | 0.2 | 2.2 | 7/3.0 | 1.2 | 90.9 | 6991 | 0.0605 |
| 3x1x630+1x50 | 53 | 3.4 | 0.2 | 2.4 | 7/3.0 | 1.2 | 99.8 | 8505 | 0.0469 |
| 8.7/16(17.5)kV | |||||||||
| 3x1x50+1x50 | 6 | 4.5 | 0.2 | 2 | 7/3.0 | 1.2 | 55.1 | 2220 | 0.641 |
| 3x1x70+1x50 | 12 | 4.5 | 0.2 | 2 | 7/3.0 | 1.2 | 58.8 | 2528 | 0.443 |
| 3x1x95+1x50 | 15 | 4.5 | 0.2 | 2 | 7/3.0 | 1.2 | 62.6 | 2888 | 0.32 |
| 3x1x120+1x50 | 15 | 4.5 | 0.2 | 2 | 7/3.0 | 1.2 | 65.2 | 3181 | 0.253 |
| 3x1x150+1x50 | 15 | 4.5 | 0.2 | 2 | 7/3.0 | 1.2 | 68.5 | 3520 | 0.206 |
| 3x1x185+1x50 | 30 | 4.5 | 0.2 | 2 | 7/3.0 | 1.2 | 72.1 | 3956 | 0.164 |
| 3x1x240+1x50 | 30 | 4.5 | 0.2 | 2.1 | 7/3.0 | 1.2 | 77.5 | 4648 | 0.125 |
| 3x1x300+1x50 | 30 | 4.5 | 0.2 | 2.1 | 7/3.0 | 1.2 | 82.3 | 5329 | 0.1 |
| 3x1x400+1x50 | 53 | 4.5 | 0.2 | 2.2 | 7/3.0 | 1.2 | 88.6 | 6292 | 0.0778 |
| 3x1x500+1x50 | 53 | 4.5 | 0.2 | 2.3 | 7/3.0 | 1.2 | 96.6 | 7509 | 0.0605 |
| 3x1x630+1x50 | 53 | 4.5 | 0.2 | 2.4 | 7/3.0 | 1.2 | 105 | 9027 | 0.0469 |
| 12/20(24)kV | |||||||||
| 3x1x50+1x50 | 6 | 5.5 | 0.2 | 2 | 7/3.0 | 1.2 | 59.8 | 2490 | 0.641 |
| 3x1x70+1x50 | 12 | 5.5 | 0.2 | 2 | 7/3.0 | 1.2 | 63.5 | 2816 | 0.443 |
| 3x1x95+1x50 | 15 | 5.5 | 0.2 | 2 | 7/3.0 | 1.2 | 67.4 | 3193 | 0.32 |
| 3x1x120+1x50 | 15 | 5.5 | 0.2 | 2 | 7/3.0 | 1.2 | 70 | 3499 | 0.253 |
| 3x1x150+1x50 | 15 | 5.5 | 0.2 | 2 | 7/3.0 | 1.2 | 73.2 | 3853 | 0.206 |
| 3x1x185+1x50 | 30 | 5.5 | 0.2 | 2 | 7/3.0 | 1.2 | 76.9 | 4306 | 0.164 |
| 3x1x240+1x50 | 30 | 5.5 | 0.2 | 2.1 | 7/3.0 | 1.2 | 82.3 | 5022 | 0.125 |
| 3x1x300+1x50 | 30 | 5.5 | 0.2 | 2.2 | 7/3.0 | 1.2 | 87.5 | 5763 | 0.1 |
| 3x1x400+1x50 | 53 | 5.5 | 0.2 | 2.3 | 7/3.0 | 1.2 | 93.7 | 6756 | 0.0778 |
| 3x1x500+1x50 | 53 | 5.5 | 0.2 | 2.4 | 7/3.0 | 1.2 | 101.7 | 8014 | 0.0605 |
| 3x1x630+1x50 | 53 | 5.5 | 0.2 | 2.5 | 7/3.0 | 1.2 | 110.2 | 9574 | 0.0469 |
| 18/30(36)kV | |||||||||
| 3x1x50+1x50 | 6 | 8 | 0.2 | 2 | 7/3.0 | 1.2 | 70.6 | 3177 | 0.641 |
| 3x1x70+1x50 | 12 | 8 | 0.2 | 2 | 7/3.0 | 1.2 | 74.3 | 3540 | 0.443 |
| 3x1x95+1x50 | 15 | 8 | 0.2 | 2.1 | 7/3.0 | 1.2 | 78.6 | 3991 | 0.32 |
| 3x1x120+1x50 | 15 | 8 | 0.2 | 2.1 | 7/3.0 | 1.2 | 81.2 | 4324 | 0.253 |
| 3x1x150+1x50 | 15 | 8 | 0.2 | 2.2 | 7/3.0 | 1.2 | 84.9 | 4748 | 0.206 |
| 3x1x185+1x50 | 30 | 8 | 0.2 | 2.2 | 7/3.0 | 1.2 | 88.6 | 5242 | 0.164 |
| 3x1x240+1x50 | 30 | 8 | 0.2 | 2.3 | 7/3.0 | 1.2 | 94 | 6018 | 0.125 |
| 3x1x300+1x50 | 30 | 8 | 0.2 | 2.4 | 7/3.0 | 1.2 | 99.1 | 6816 | 0.1 |
| 3x1x400+1x50 | 53 | 8 | 0.2 | 2.5 | 7/3.0 | 1.2 | 105.4 | 7880 | 0.0778 |
| 3x1x500+1x50 | 53 | 8 | 0.2 | 2.6 | 7/3.0 | 1.2 | 113.4 | 9224 | 0.0605 |
| 3x1x630+1x50 | 53 | 8 | 0.2 | 2.7 | 7/3.0 | 1.2 | 121.8 | 121.8 | 0.0469 |
Huili Cable Co., Ltd. (formerly Luohe Huili Cable Co., Ltd. and Luohe Cable Factory) was founded in 1989 and was renamed Huili Cable Co., Ltd. on September 14, 2024. The company's registered capital is RMB 200 million.
