What Is the Difference Between H05V-U and H07V-U?
A comparison of H05V-U and H07V-U solid PVC installation wires by voltage class, conductor construction and selection criteria.
Technical Comparison
| Technical Attribute | H05V-U | H07V-U |
|---|---|---|
| Rated voltage | 300/500 V | 450/750 V |
| Conductor construction | Solid copper (U) | Solid copper (U) |
| Insulation | PVC (V) | PVC (V) |
| Product family | Solid PVC installation wire | Solid PVC installation wire |
| Primary selection context | Suitable 300/500 V fixed-wiring applications | Suitable 450/750 V fixed-wiring applications |
H05V-U and H07V-U are harmonised PVC-insulated wires with solid copper conductors. In some markets both may be described using the same local trade name, so the full designation must be checked before an order or substitution is approved.
The main distinction is voltage class
H05V-U belongs to the 300/500 V class, while H07V-U belongs to the 450/750 V class. The final U identifies a solid conductor construction. Both are considered in the context of protected fixed wiring, subject to the permitted cross-section, installation method and applicable rules.
Which one should be selected?
A higher voltage class does not automatically make a cable preferable in every installation. System voltage, project specification, routing in conduit or equipment, terminal compatibility, conductor size and short-circuit conditions all affect the decision. A change from one designation to another should be approved through a competent project assessment.
