Three Core Medium Voltage Cable to BS 6622/BS 7835
This three core medium voltage cable provides a complete three-phase power distribution solution for voltages from 3.6/6.6kV up to 19/33kV at 50Hz, built to BS 6622 and BS 7835 (LSZH Version) for enhanced fire safety in public and industrial environments. Featuring XLPE GP8 or EPR GP7 insulation to BS 7655 and a 0.3mm minimum extruded semi-conducting conductor screen, it is suitable for installation in power supply stations, indoor cable ducts, outdoor trays, underground routes, submerged applications and industrial switchboards.
Key Advantages
LSZH Low Smoke Zero Halogen Sheath
XLPE/EPR Insulation
Copper or Aluminium Conductor Options
BS 6622 & BS 7835 British Standard
Construction
| Conductor | Plain annealed copper or aluminium complying with IEC 60228/BS 6360. Copper conductors shall be stranded (class 2) and aluminium conductors shall be either solid or stranded (class 2). |
| Insulation | Insulation is of cross-linked polyethylene compound XLPE (GP8) conforming to BS 7655-1.3 or EPR (GP7), conforming to BS 7655-1.2. |
| Conductor Screen | Extruded layer of semi-conducting cross-linkable compound is applied over the conductor and shall cover the surface completely. The minimum thickness is 0.3mm and the maximum resistivity shall not exceed 500 Ohm-m at 90°C. |
| Insulation Screen | Extruded layer of semi-conducting cross-linkable compound is applied over the insulation. The extruded semi-conducting layer shall consist of bonded or cold strippable semi-conducting compound capable of removal for jointing or terminating. As an option, a semi-conducting tape may be applied over the extruded semi-conducting layer as a bedding for the metallic layer. The minimum thickness is 0.3 mm and the maximum resistivity is 500 Ohm-m at 90°C. The screen is tightly fitted to the insulation to exclude all air voids and can be easily hand stripped on site. |
| Inner Covering & Fillers | For cables with a collective metallic layer or cables with a metallic layer over each individual cores with additional collective metallic layers, semi-conducting inner covering and fillers shall be applied over the laid up cores. The inner covering is made of non hygroscopic material, except if the cable is to be made longitudinally watertight. The inner covering shall be extruded or lapped. |
| Metallic Layer | The metallic layer shall be applied over each core or applied as a collective screen. The metallic screen shall consist of either copper tapes or a concentric layer of copper wires or a combination of tapes and wires. The metallic layer provides an earth fault current path, capable of withstanding fault current to earth of 1000A for one second at maximum temperature 160°C. Copper wires are applied over the conducting water blocking layer with a minimum diameter of 0.5mm. And over the copper wires, copper tape with minimum thickness of 0.1mm can be applied helically with overlap. |
| Separation Sheath (for armored cable) | The separation sheath comprises a layer of extruded PVC, PE or LSZH. The nominal thickness is calculated by 0.02Du + 0.6mm where Du is the fictitious diameter under the sheath in mm. The nominal separation sheath thickness shall not be less than 1.2mm. |
| Armour (for armored cable) | The armour consists of galvanized steel wire applied over the inner covering with diameter specified as in Table 4. |
| Over Sheath | Overall sheath comprises a layer of extruded either PVC type 9 conforming to BS 7665-4.2 or MDPE type TS2 conforming to BS 7655-10.1. LSZH can be offered as an option. The over sheath is normally black in colour. When a DC voltage test is to be performed on the over sheath, a semi-conducting layer such as graphite coating shall be applied over the surface of the extruded over sheath. The nominal over sheath thickness is calculated by 0.035+D where D is the diameter immediately under the over sheath in mm. For cables with the over sheath not applied over the armour, the nominal over sheath thickness shall not be less than 1.4mm. And for cables with over sheath applied over the armour, the nominal over sheath thickness shall not be less than 1.8mm. |
| Physical Properties | Operating Temperature: up to 90°C Temperature Range: -5°C (PVC or LSZH sheath); -20°C (PE sheath) Short Circuit Temperature: 250°C (short circuit duration up to 5 seconds) Bending Radius: 15 × OD |
Parameters
| Nom. Cross-Section Area | Unarmoured Cables | Steel Wire Armoured Cables | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Nom. Insulation Thickness | Copper Wire Screen Area | Nom. Sheath Thickness | Approx. Overall Diameter | Approx. Weight | Copper Tape Screen Area | Nom. Bedding Thickness | Nom. Armour Wire Diameter | Nom. Sheath Thickness | Approx. Overall Diameter | Approx. Weight | |||
| CU | AL | CU | AL | ||||||||||
| mm² | mm | mm² | mm | mm | kg/km | mm² | mm | mm | mm | mm | kg/km | ||
| 25 | 2.5 | 16 | 2.1 | 37.7 | 2205 | 1740 | 3.4 | 1.2 | 2.0 | 2.2 | 44.5 | 3890 | 3465 |
| 35 | 2.5 | 16 | 2.3 | 41.2 | 2690 | 2010 | 3.6 | 1.2 | 2.5 | 2.3 | 46.8 | 4420 | 3730 |
| 50 | 2.5 | 16 | 2.5 | 44.9 | 3340 | 2350 | 3.8 | 1.3 | 2.5 | 2.5 | 51.5 | 5640 | 4690 |
| 70 | 2.5 | 16 | 2.6 | 48.0 | 4050 | 2730 | 4.3 | 1.3 | 2.5 | 2.6 | 55.0 | 6570 | 5240 |
| 95 | 2.5 | 16 | 2.7 | 51.7 | 5000 | 3180 | 4.7 | 1.4 | 2.5 | 2.7 | 58.9 | 7760 | 5890 |
| 120 | 2.5 | 16 | 2.8 | 54.7 | 5890 | 3590 | 5.0 | 1.5 | 2.5 | 2.8 | 62.1 | 8810 | 6510 |
| 150 | 2.5 | 25 | 2.9 | 58.4 | 6960 | 4160 | 5.3 | 1.5 | 2.5 | 2.9 | 65.8 | 10110 | 7310 |
| 185 | 2.5 | 25 | 3.0 | 61.9 | 8160 | 4650 | 5.8 | 1.6 | 2.5 | 3.0 | 69.5 | 11520 | 7960 |
| 240 | 2.6 | 25 | 3.2 | 68.1 | 10210 | 5530 | 6.3 | 1.7 | 2.5 | 3.2 | 75.9 | 13920 | 9140 |
| 300 | 2.8 | 25 | 3.5 | 73.6 | 12380 | 6670 | 7.0 | 1.8 | 3.15 | 3.5 | 83.1 | 17400 | 11620 |
| 400 | 3.0 | 35 | 3.7 | 83.8 | 16190 | 8430 | 7.7 | 2.0 | 3.15 | 3.7 | 93.0 | 21900 | 13980 |
| Nom. Cross-Section Area | Unarmoured Cables | Steel Wire Armoured Cables | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Nom. Insulation Thickness | Copper Wire Screen Area | Nom. Sheath Thickness | Approx. Overall Diameter | Approx. Weight | Copper Tape Screen Area | Nom. Bedding Thickness | Nom. Armour Wire Diameter | Nom. Sheath Thickness | Approx. Overall Diameter | Approx. Weight | |||
| CU | AL | CU | AL | ||||||||||
| mm² | mm | mm² | mm | mm | kg/km | mm² | mm | mm | mm | mm | kg/km | ||
| 25 | 3.4 | 16 | 2.3 | 42.8 | 2600 | 2120 | 3.8 | 1.3 | 2.5 | 2.4 | 50.0 | 4930 | 4400 |
| 35 | 3.4 | 16 | 2.3 | 45.3 | 3000 | 2320 | 4.1 | 1.3 | 2.5 | 2.5 | 52.3 | 5380 | 4700 |
| 50 | 3.4 | 16 | 2.4 | 48.5 | 3630 | 2690 | 4.4 | 1.4 | 2.5 | 2.6 | 55.7 | 6210 | 5260 |
| 70 | 3.4 | 16 | 2.5 | 52.0 | 4440 | 3110 | 4.7 | 1.4 | 2.5 | 2.7 | 59.2 | 7200 | 5870 |
| 95 | 3.4 | 16 | 2.7 | 56.0 | 5440 | 3620 | 5.2 | 1.5 | 2.5 | 2.8 | 63.2 | 8420 | 6550 |
| 120 | 3.4 | 16 | 2.8 | 59.4 | 6370 | 4020 | 5.5 | 1.6 | 2.5 | 3.0 | 67.0 | 9580 | 7190 |
| 150 | 3.4 | 25 | 2.9 | 62.7 | 7430 | 4630 | 5.8 | 1.6 | 2.5 | 3.1 | 70.3 | 10830 | 8030 |
| 185 | 3.4 | 25 | 3.0 | 66.1 | 8680 | 5150 | 6.2 | 1.7 | 2.5 | 3.2 | 73.9 | 12290 | 8720 |
| 240 | 3.4 | 25 | 3.1 | 71.7 | 10690 | 5990 | 6.8 | 1.8 | 3.15 | 3.4 | 81.2 | 15620 | 10790 |
| 300 | 3.4 | 25 | 3.3 | 76.4 | 12770 | 7050 | 7.3 | 1.9 | 3.15 | 3.6 | 86.1 | 18030 | 12240 |
| 400 | 3.4 | 35 | 3.5 | 85.1 | 16460 | 8680 | 8.0 | 2.0 | 3.15 | 3.8 | 95.0 | 22350 | 14350 |
|
Nom. Cross-Section Area |
Unarmoured Cables | Steel Wire Armoured Cables | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Nom. Insulation Thickness |
Copper Wire Screen Area |
Nom. Sheath Thickness |
Approx. Overall Diameter |
Approx. Weight |
Copper Tape Screen Area |
Nom. Bedding Thickness |
Nom. Armour Wire Diameter |
Nom. Sheath Thickness |
Approx. Overall Diameter |
Approx. Weight | |||
| CU | AL | CU | AL | ||||||||||
| mm² | mm | mm² | mm | mm | kg/km | mm² | mm | mm | mm | mm | kg/km | ||
| 25 | 4.5 | 16 | 2.4 | 48.4 | 3000 | 2420 | 4.4 | 1.4 | 2.5 | 2.6 | 55.2 | 5600 | 5100 |
| 35 | 4.5 | 16 | 2.5 | 50.4 | 3450 | 2670 | 4.7 | 1.4 | 2.5 | 2.7 | 57.6 | 6130 | 5440 |
| 50 | 4.5 | 16 | 2.6 | 53.7 | 4140 | 3190 | 4.9 | 1.5 | 2.5 | 2.8 | 61.1 | 7010 | 6060 |
| 70 | 4.5 | 16 | 2.7 | 57.2 | 4980 | 3640 | 5.3 | 1.5 | 2.5 | 2.9 | 64.6 | 8030 | 6700 |
| 95 | 4.5 | 16 | 2.8 | 60.6 | 5900 | 4050 | 5.7 | 1.6 | 2.5 | 3.0 | 68.2 | 9160 | 7330 |
| 120 | 4.5 | 16 | 2.9 | 63.9 | 6870 | 4560 | 6.1 | 1.7 | 2.5 | 3.1 | 71.7 | 10340 | 8030 |
| 150 | 4.5 | 25 | 3.0 | 67.9 | 8030 | 5230 | 6.4 | 1.7 | 2.5 | 3.2 | 75.4 | 11730 | 8930 |
| 185 | 4.5 | 25 | 3.1 | 71.1 | 9310 | 5770 | 6.8 | 1.8 | 3.15 | 3.4 | 80.6 | 14170 | 10570 |
| 240 | 4.5 | 25 | 3.3 | 76.9 | 11390 | 6680 | 7.4 | 1.9 | 3.15 | 3.6 | 86.6 | 16670 | 11810 |
| 300 | 4.5 | 25 | 3.5 | 81.6 | 13510 | 7790 | 7.9 | 2.0 | 3.15 | 3.7 | 91.3 | 19140 | 13340 |
| 400 | 4.5 | 35 | 3.7 | 89.9 | 17130 | 9340 | 8.5 | 2.1 | 3.15 | 4.0 | 100.0 | 23360 | 15410 |
|
Nom. Cross-Section Area |
Unarmoured Cables | Steel Wire Armoured Cables | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Nom. Insulation Thickness |
Copper Wire Screen Area |
Nom. Sheath Thickness |
Approx. Overall Diameter |
Approx. Weight |
Copper Tape Screen Area |
Nom. Bedding Thickness |
Nom. Armour Wire Diameter |
Nom. Sheath Thickness |
Approx. Overall Diameter |
Approx. Weight |
|||
| CU | AL | CU | AL | ||||||||||
| mm² | mm | mm² | mm | mm | kg/km | mm² | mm | mm | mm | mm | kg/km | ||
| 35 | 5.5 | 16 | 2.7 | 51 | 3750 | 2880 | 5.2 | 1.5 | 2.5 | 2.8 | 62.3 | 6870 | 6140 |
| 50 | 5.5 | 16 | 2.8 | 54 | 4240 | 3250 | 5.4 | 1.5 | 2.5 | 2.9 | 65.6 | 7710 | 6810 |
| 70 | 5.5 | 16 | 2.9 | 58 | 5050 | 3650 | 5.9 | 1.6 | 2.5 | 3.0 | 69.0 | 8710 | 7370 |
| 95 | 5.5 | 16 | 3.0 | 62 | 6010 | 4110 | 6.2 | 1.7 | 2.5 | 3.2 | 73.1 | 10000 | 8130 |
| 120 | 5.5 | 16 | 3.1 | 65 | 6990 | 4660 | 6.6 | 1.7 | 3.15 | 3.3 | 77.7 | 12040 | 9730 |
| 150 | 5.5 | 25 | 3.2 | 68 | 8130 | 5330 | 6.9 | 1.8 | 3.15 | 3.4 | 81.7 | 13550 | 10750 |
| 185 | 5.5 | 25 | 3.3 | 72 | 9410 | 5870 | 7.4 | 1.9 | 3.15 | 3.6 | 85.5 | 15150 | 11610 |
| 240 | 5.5 | 25 | 3.5 | 79 | 11490 | 6880 | 7.8 | 2.0 | 3.15 | 3.7 | 91.3 | 17710 | 12840 |
| 300 | 5.5 | 25 | 3.7 | 84 | 13710 | 7890 | 8.2 | 2.0 | 3.15 | 3.9 | 96.0 | 20170 | 14360 |
| 400 | 5.5 | 35 | 3.9 | 91 | 17230 | 9440 | 9.0 | 2.2 | 3.15 | 4.1 | 104.8 | 24520 | 16480 |
|
Nom. Cross-Section Area |
Unarmoured Cables | Steel Wire Armoured Cables | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Nom. Insulation Thickness |
Copper Wire Screen Area |
Nom. Sheath Thickness |
Approx. Overall Diameter |
Approx. Weight |
Copper Tape Screen Area |
Nom. Bedding Thickness |
Nom. Armour Wire Diameter |
Nom. Sheath Thickness |
Approx. Overall Diameter |
Approx. Weight |
|||
| CU | AL | CU | AL | ||||||||||
| mm² | mm | mm² | mm | mm | kg/km | mm² | mm | mm | mm | mm | kg/km | ||
| 35 | 5.5 | 16 | 2.7 | 51 | 3750 | 2880 | 5.2 | 1.5 | 2.5 | 2.8 | 62.3 | 6870 | 6140 |
| 50 | 5.5 | 16 | 2.8 | 54 | 4240 | 3250 | 5.4 | 1.5 | 2.5 | 2.9 | 65.6 | 7710 | 6810 |
| 70 | 5.5 | 16 | 2.9 | 58 | 5050 | 3650 | 5.9 | 1.6 | 2.5 | 3.0 | 69.0 | 8710 | 7370 |
| 95 | 5.5 | 16 | 3.0 | 62 | 6010 | 4110 | 6.2 | 1.7 | 2.5 | 3.2 | 73.1 | 10000 | 8130 |
| 120 | 5.5 | 16 | 3.1 | 65 | 6990 | 4660 | 6.6 | 1.7 | 3.15 | 3.3 | 77.7 | 12040 | 9730 |
| 150 | 5.5 | 25 | 3.2 | 68 | 8130 | 5330 | 6.9 | 1.8 | 3.15 | 3.4 | 81.7 | 13550 | 10750 |
| 185 | 5.5 | 25 | 3.3 | 72 | 9410 | 5870 | 7.4 | 1.9 | 3.15 | 3.6 | 85.5 | 15150 | 11610 |
| 240 | 5.5 | 25 | 3.5 | 79 | 11490 | 6880 | 7.8 | 2.0 | 3.15 | 3.7 | 91.3 | 17710 | 12840 |
| 300 | 5.5 | 25 | 3.7 | 84 | 13710 | 7890 | 8.2 | 2.0 | 3.15 | 3.9 | 96.0 | 20170 | 14360 |
| 400 | 5.5 | 35 | 3.9 | 91 | 17230 | 9440 | 9.0 | 2.2 | 3.15 | 4.1 | 104.8 | 24520 | 16480 |
Request the Complete Data Sheet
Application
They are suitable for installation mostly in power supply stations, indoors and in cable ducts, outdoors, underground and in water as well as forinstallation on cable trays for industries, switchboards and power stations
From Production to Delivery
From raw material preparation to final shipmen, every stage is caretuly controled to ensure consistent conductor quality, reliable pertormance,and sae delivery. Our roduction,
inspection, packaging, and logistics processes are managed in accordance with applicable standards and project requirements.
Production
Stranded annealed copper conductors are insulated with XLPE, assembled into the required multicore configuration, optionally filled and bound with polyester tape, then covered with the specified black PVC sheath.
Inspection
Inspection focuses on conductor construction, insulation condition, core identification, sheath integrity, overall diameter, conductor resistance and test-voltage requirements against the approved technical schedule.
Packaging
Finished cable is wound on suitable drums according to ordered size, weight and length. Cable ends are protected and drum identification can include cable type, conductor size, core count, length and project reference.
Shipping
Before shipment, cable drums and technical documents are checked against the order. Inspection records, identification data and requested test documentation can be prepared for the customer.
faq
What is the voltage range of these three core medium voltage cables?
These three core cables are designed for distribution of electrical power with a nominal voltage Uo/U ranging from 3.8/6.6KV to 19/33KV, at a frequency of 50Hz.
What insulation options can I choose from?
Three insulation types are offered:
PVC (Polyvinyl Chloride) — for 1.8/3kV and 3.6/6kV cables, a cost-effective and reliable option
XLPE (Cross-Linked Polyethylene) — high temperature rating (90°C), superior electrical performance and current-carrying capacity
EPR/HEPR (Ethylene Propylene Rubber) — excellent flexibility, cold resistance, and mechanical resilience
What oversheath materials are available?
The outer sheath is available in PVC, PE (Polyethylene), or LSZH (Low Smoke Zero Halogen) materials. LSZH is recommended for enclosed spaces and public areas due to its low smoke emission and zero halogen content in case of fire.
When should I choose single core cables over three core cables?
Single core cables are typically preferred for:
High-current circuits where individual phase installation is required
Single-phase systems
Applications requiring easier cable pulling and installation
Circuits where individual phase replacement or maintenance may be needed
Large conductor sizes where three-core construction becomes impractical
Can you manufacture custom cable specifications?
Yes, we offer extensive customization options to meet specific project requirements including:
- Special core configurations (e.g., 3+1E, 3+2E, 4+1E, custom multi-core)
- Custom outer sheath colors (red, blue, grey, etc. for identification)
- Special print marking with customer logo, project name, or custom text
- Low smoke zero halogen (LSZH) versions for special fire safety requirements
- UV-stabilized formulations for extreme outdoor exposure
- Oil-resistant and chemical-resistant sheath compounds
- Custom length drums and packaging
Custom orders typically require MOQ and may have slightly longer lead times. Contact our sales team with your specific requirements for a quote.
What is the typical lead time for orders?
Typical production lead times:
- Standard specifications (common sizes): 7-15 working days after order confirmation
- Custom specifications or special requirements: 15-25 working days
- Large volume orders: production schedule confirmed at time of order
We also maintain inventory of fast-moving standard sizes for immediate shipment. Transit time depends on destination port and shipping method. We can ship by sea (most cost-effective for large orders), air (urgent shipments), or rail (for Central Asian destinations).
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Contact Information
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