YJV32-0.6-1kV
YJV32 Armoured Cable — Steel Wire Armoured XLPE Power Cable 0.6/1 kV
Round galvanised steel wire armour that carries the cable's own weight — specified where the route pulls, drops or hangs.
YJV32 replaces the flat tapes of a 22-type build with a single layer of round galvanised steel wires applied helically over the bedding. Because a wire works efficiently in tension, this armour accepts axial load rather than just radial pressure, which is why it is written into shaft, riser and long-pull specifications. The trade-offs are measurable: roughly 10-15 % more weight than the tape-armoured equivalent, a slightly larger overall diameter, and higher material cost for the wire.
Voltcore sizes the wire count and diameter from the installed condition, not from a default table. A 4-core 120 mm² feeder being pulled 250 m through a duct bank and the same cable hanging in a 60 m vertical shaft impose very different demands, so we ask for route length, number and angle of bends, and whether the top termination carries weight. Where the suspended length exceeds what the armour can hold safely we recommend cleating every 2-3 m as well.
Specification
| Item | Value |
|---|---|
| Rated voltage U0/U (Um) | 0.6/1 (1.2) kV |
| Conductor | Class 2 stranded compacted copper, IEC 60228 |
| Core count | 2, 3, 4, 5, 3+1, 3+2, 4+1 |
| Cross-section range | 4 - 630 mm² |
| Insulation | Cross-linked polyethylene (XLPE) |
| Bedding | Extruded PVC type ST1 or lapped tape graduated with cable diameter |
| Armour type | Single layer of round galvanised steel wires, 1.25 mm to 2.5 mm diameter, helical |
| Armour wire standard | Zinc-coated low carbon steel wire to IEC 60502-1 / EN 10257-1 |
| Oversheath | PVC type ST1/ST2, black |
| Max conductor temperature, continuous | 90 °C |
| Max conductor temperature, short circuit (5 s) | 250 °C |
| Minimum bending radius, multi-core armoured | 12 × overall diameter |
| Test voltage at 50 Hz | 3.5 kV, 5 min |
| Recommended support spacing on vertical runs | 2 - 3 m cleats above approximately 30 m unsupported length |
Layer-by-layer construction
Listed from the conductor outward. Read this alongside the specification table — the two together tell you whether the cable will survive its installation method.
- 1. ConductorCompacted Class 2 annealed copper to IEC 60228, available tinned where corrosive environments or direct burial are specified
- 2. InsulationXLPE applied over the conductor and cross-linked under steam, nominal thickness matching the IEC 60502-1 table per section
- 3. Laying-up and fillerCores cabled with extruded polypropylene fillers and a non-hygroscopic binder tape to form a stable circular base for the armour
- 4. BeddingExtruded PVC inner covering, 1.2 mm nominal minimum, providing the seating bed that transfers load into the armour wires
- 5. Steel wire armourRound galvanised low-carbon steel wires laid helically in a single layer to IEC 60502-1, wire count and diameter set by required tensile capacity
- 6. OversheathExtruded black PVC type ST1/ST2 over the armour to lock wire pitch and seal against moisture ingress into the interstices
Reference dimensions and weights
| Nominal cross-section (mm²) | Conductor structure (no./mm) | Insulation thickness (mm) | Armour wire diameter (mm) | Approx. overall diameter (mm) | Approx. net weight (kg/km) |
|---|---|---|---|---|---|
| 4×10 | 7/1.35 | 0.7 | 1.25 | 25.0 | 1480 |
| 4×16 | 7/1.70 | 0.7 | 1.25 | 27.5 | 1900 |
| 4×25 | 7/2.14 | 0.9 | 1.6 | 30.8 | 2480 |
| 4×35 | 7/2.52 | 0.9 | 1.6 | 33.2 | 3020 |
| 4×50 | 19/1.78 | 1.0 | 1.6 | 36.5 | 3850 |
| 4×70 | 19/2.14 | 1.1 | 2.0 | 41.0 | 5050 |
| 4×95 | 19/2.52 | 1.1 | 2.0 | 46.2 | 6450 |
| 4×120 | 37/2.03 | 1.2 | 2.5 | 50.2 | 7850 |
| 4×150 | 37/2.25 | 1.4 | 2.5 | 55.0 | 9400 |
| 4×185 | 37/2.52 | 1.6 | 2.5 | 60.4 | 11400 |
Reference figures for preliminary sizing and drum planning. Overall diameter and weight vary with strand construction and sheath thickness tolerance; certified drawings are issued with each quotation.
Engineering characteristics
- Round galvanised steel wires give the armour genuine tensile capacity, transferring the cable's own weight into the top termination rather than into the conductor.
- Suitable for unsupported vertical drops typically up to 30 m without intermediate cleats, depending on size and route safety factors.
- Bedding layer spreads radial pressure evenly across the wire layer, so external crush loads still perform well despite the tape-free design.
- Maximum permissible pulling tension several times that of YJV22, allowing single pulls over long duct sections with multiple bends.
- Zinc-coated wire to EN 10257-1 tested for coating uniformity and elongation before the armour machine accepts the coil.
- 90 °C continuous and 250 °C / 5 s short-circuit ratings unchanged from the unarmoured construction.
- Wire layer also accepts bonding glands, so it can act as the earth path subject to a resistance and fault-capacity check.
Typical applications
- Vertical shafts in mines, tunnels and high-rise building risers
- Long single pulls through duct banks where winch tension is high
- Riser ducts in towers feeding floor-by-floor distribution boards
- Quarry, port and marine terminal installations subject to drag and vibration
- Temporary site supply dragged across open ground and re-routed
- Substation and tunnel routes with steep gradients or vertical transitions
Ordering options
- Tinned copper conductors where the sheath may be breached during pulling in wet ground
- Aluminium wire armour written YJV62 for single-core AC runs that need a non-magnetic layer
- PE oversheath written YJV33 where the route sits permanently in waterlogged ground
- <｜hy_place▁holder▁no▁813｜>-length cards and pulling-socket preparation supplied ready for site winching
- Heavier 3.0 mm armour wire for vertical drops beyond standard unsupported length
Standards manufactured to
- IEC 60502-1
- GB/T 12706.1
- IEC 60228 (conductor)
- EN 10257-1 (zinc-coated steel wire for armouring)
- IEC 60332-1-2 (flame propagation)
- EN 50575 (CPR reaction to fire)
Manufactured to other standards on request. Send the standard number with your RFQ and we will quote against it rather than against a near-equivalent.
Price and availability for YJV32 Steel Wire Armoured XLPE Power Cable
Include cross-section, core count, voltage grade, route length and installation method — those five determine price more than anything else on the page.
- Engineer-reviewed before pricing
- Reference drawings issued with the quotation
- Free sample up to free sample up to 5 m
YJV32 Steel Wire Armoured XLPE Power Cable — frequently asked questions
What is the real difference between YJV22 and YJV32?
The armour geometry. YJV22 uses two flat steel tapes, which resist crushing from above but carry almost no tension. YJV32 uses round steel wires, which resist pulling force and support suspended weight. Buried routes in open ground take YJV22; shafts, risers and long pulls take YJV32. Everything else, including ratings and voltage class, is identical.
How much pull can YJV32 take compared with YJV22?
Permissible pulling tension is set mainly by the armour, and wire armour raises the limit substantially. As a working guide Voltcore allows several times the tension applied to an equivalent tape-armoured cable, but the binding constraint is often side-wall pressure at bends. Give us the route profile and we return a calculated maximum winch tension.
Does YJV32 need special glands?
Yes, use glands designed for wire armour: they clamp the wires in a cone or slotted armour clamp and provide an earth tag. Standard SWA glands suit most sizes, and twin or three-part glands are needed where the armour is also the protective conductor. Do not reuse tape-armoured glands; they will not grip the round wires.
Can I bury YJV32 instead of YJV22?
You can, and some specifications do, on routes combined with a vertical section so one drum covers the whole job. It costs more and the larger diameter may not fit the intended duct. Where the run is wholly flat and buried, tape armour is the better value; specify wire armour only where tensile duty exists.
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