Can H07V2-K / H05V2-K Substitute H07V-K EN 50525 Control Flexible Cable?

Yes, H07V2-K and H05V2-K flexible cables can directly substitute standard H07V-K cables certified under EN 50525-2-31, provided voltage rating constraints are strictly maintained. Manufactured to EN 50525-2-31, the V2 suffix designates a specialized heat-resistant Polyvinyl Chloride ([1]) insulation rated for a continuous operating conductor temperature of 90°C, compared to the standard 70°C operating limit of base H07V-K. H07V2-K ($450/750\text{V}$, cross-sections $\ge 1.5\text{ mm}^2$) offers a superior thermal upgrade for high-density control panels and switchgear. However, H05V2-K ($300/500\text{V}$, sizes $\le 1.0\text{ mm}^2$) must only substitute H07V-K if the system operating voltage does not exceed $300\text{V}$ to earth.

Technical Parameter Comparison Matrix

Key Substitution Parameters & Technical Benefits

1. Thermal Endurance Advantage (90°C vs. 70°C)

The primary distinction lies in the heat-resistant Type TI 3 PVC insulation compound. While standard H07V-K degrades when subjected to continuous thermal exposure above 70°C, H07V2-K maintains dielectric integrity up to 90°C. Substituting with H07V2-K allows higher current-carrying capacities under elevated ambient temperatures inside enclosed switchgear, motor control centers (MCC), and transformer housings.

2. Voltage Rating Limitations (H07 vs. H05)

Voltage rating dictates substitution validity:

• H07V2-K: Serves as a 1:1 technical upgrade for H07V-K across all 450/750V power and control installations.
• H05V2-K: Features a lower dielectric voltage rating ($300/500\text{V}$). It can only replace H07V-K in auxiliary control loops, electronic signal paths, and instrumentation circuits where phase-to-earth voltage remains strictly $\le 300\text{V}$.

3. Conductor Class & Bending Radius

Both cable series use Class 5 plain annealed fine-stranded copper conductors pursuant to IEC 60228. Bending radii, mechanical flexibility, and compatibility with standard DIN 46228 crimping ferrules remain identical, ensuring seamless physical installation into panel trunking and terminal blocks.

Prohibited Substitution Scenarios

• Low Smoke Zero Halogen (LSZH) Mandates: Neither V-K nor V2-K compounds are halogen-free. In underground railway networks, public transit hubs, or enclosed marine applications specifying LSZH materials, H07Z-K (EN 50525-3-41) must be specified.
• Continuous Flexing / Drag Chain Applications: H07V2-K is intended for static or flexible internal equipment wiring. For continuous dynamic motion inside cable tracks or dynamic robotics, specified Class 6 polyurethane (PUR) or TPE-insulated cables are required.

CJDL CABLE Engineering Insight: For panel and switchgear builders, upgrading from H07V-K to H07V2-K (90°C rated, 450/750 V, 1.5–240 mm²) is a direct thermal upgrade that extends current-carrying capacity inside enclosed MCC and transformer housings without changing conductor class or bending radius. H05V2-K should only substitute where phase-to-earth voltage stays ≤300 V.

References

[1] Wikipedia. Polyvinyl chloride[EB/OL]. 2026-09-29.

[2] Wikipedia. IEC 60228[EB/OL]. 2026-09-29.

[3] Wikipedia. IEC 60502[EB/OL]. 2026-09-29.