YJV22 is one of the most widely used power cable models in modern electrical engineering. Its popularity stems from excellent thermal performance, reliable insulation, and cost-effectiveness across a broad range of voltage classes. This guide explains exactly what YJV means, how it's constructed, and where it should be applied.

1. Model Decoding

Important note on the letter "Y":​ While Y alone stands for polyethylene, in the YJV designation the combination YJ​ specifically denotes cross-linked polyethylene (XLPE)​ insulation — a chemically treated form of PE that dramatically improves thermal and electrical properties.

Full name:​ Cross-linked Polyethylene Insulated PVC Sheathed Power Cable

2. Construction at a Glance

Copper Conductor → XLPE Insulation → (Optional Inner Bedding) → PVC Outer Sheath

3. Technical Specifications

On core notation:​ Configurations like 3+1, 3+2, and 4+1 indicate main power cores plus reduced-size neutral/earth cores — a common cost-saving design for three-phase systems where the neutral carries less current.

4. Voltage Rating

• U₀​ = Rated phase-to-earth voltage

• U​ = Rated phase-to-phase voltage

YJV cables cover everything from low-voltage building distribution to medium-voltage sub-transmission networks.

5. Operating Characteristics

5.1 Temperature Limits

⚠️ Why this matters:​ PVC-insulated cables (VV type) are limited to 70°C continuous. YJV's XLPE insulation raises the bar to 90°C, enabling higher current-carrying capacity​ for the same conductor size — or allowing a smaller cable to replace a larger PVC one.

5.2 Installation Environment

Important limitation:​ Standard YJV without armor cannot​ withstand heavy external mechanical loads. For direct burial under roads or areas with vibration, use the armored version (YJV22).

5.3 Minimum Bending Radius

Exceeding these limits during installation can damage the insulation or sheath, leading to premature failure.

6. Application Scenarios

YJV cables are the workhorse of power distribution:

• Commercial buildings​ — main risers, switchboard feeders

• Industrial plants​ — motor feeders, substation connections

• Infrastructure​ — tunnels, bridges, utility corridors

• Utility networks​ — up to 35 kV sub-transmission

• Renewable energy​ — solar farm collection circuits, wind turbine interconnections

7. YJV vs. VV — Why Choose XLPE?

Bottom line:​ For most modern installations, YJV is the preferred choice. The slightly higher upfront cost is offset by longer service life, higher ampacity, and better performance under fault conditions.

8. Quick Selection Checklist

Before specifying YJV for your project, confirm:

• [ ] Voltage class matches system requirements (U₀/U)

• [ ] Core count and size suit the circuit configuration

• [ ] Installation method is compatible (no heavy mechanical stress)

• [ ] Ambient temperature during laying ≥ 0°C

• [ ] Bending radius can be accommodated on site

• [ ] If direct burial with vehicle load → upgrade to YJV22

• [ ] Verify CCC certification and factory test report

Key Takeaways

Pro Tip:​ When comparing YJV quotations from different suppliers, always verify the actual conductor cross-section​ and insulation thickness​ against GB 12706. Some manufacturers produce "thin-wall" versions that technically meet resistance requirements but compromise thermal performance under overload conditions.