CV and NYY are two of the most common power cables — and they’re often confused. Both are widely used, but they’re built for different jobs. Choosing between them comes down to the installation method, not just price. This guide compares CV cable vs. NYY cable so you can pick the right one.
CV Cable (XLPE / PVC)
- Insulation: cross-linked polyethylene (XLPE).
- Operating temperature: up to 90°C.
- Short-circuit tolerance: 250°C.
- Structure: compact, lightweight design.
- Best for: indoor installation on cable trays and raceways in buildings and industrial facilities.
- Limitation: cannot be directly buried.
NYY Cable (PVC / PVC)
- Insulation: PVC with a double sheath.
- Operating temperature: up to 70°C.
- Short-circuit tolerance: 160°C.
- Structure: larger diameter, heavier, dual-layer protection.
- Best for: direct burial, conduit installation, outdoor wet environments, and mechanical-impact resistance.
- Designed for: underground and external applications.
CV vs. NYY at a Glance
| Feature | CV Cable | NYY Cable |
|---|---|---|
| Insulation | XLPE | PVC (double sheath) |
| Operating temp | 90°C | 70°C |
| Short-circuit temp | 250°C | 160°C |
| Build | Compact, lightweight | Larger, heavier, dual-layer |
| Best use | Indoor tray/raceway | Direct burial, outdoor, wet |
| Direct burial | No | Yes |
The Key Operational Difference
Because of its superior thermal tolerance, CV cable carries a higher current capacity in the same conductor size. NYY, on the other hand, trades some current capacity for mechanical durability and moisture protection. In short: CV maximizes efficient current distribution in controlled indoor environments, while NYY maximizes rugged protection for underground and exposed runs.
Which Should You Choose?
Prioritize the installation method over cost alone: choose CV for controlled indoor environments that need efficient current distribution, and NYY for underground or exposed outdoor applications that need robust protection.
Get CV and NYY Cable from TETA Intertrade
TETA Intertrade is a wholesale specialist supplying TIS-standard CV and NYY cable in the full range of sizes for building, industrial, and outdoor work. We help you match the right cable to your installation method — safe, efficient, and durable.
Frequently Asked Questions (FAQs)
Can CV cable be buried directly in the ground?
No. CV cable is designed for indoor cable trays and raceways and cannot be direct-buried. For direct burial, use NYY, which has a double sheath built for underground and wet conditions.
Why does CV cable carry more current than NYY of the same size?
CV uses XLPE insulation with a higher operating temperature (90°C vs. 70°C), so the same conductor size can safely carry more current before overheating.
Which cable is better for outdoor and wet environments?
NYY. Its double PVC sheath, larger build, and moisture and impact resistance make it the right choice for outdoor, wet, and mechanically demanding installations.
Should I choose based on price?
No — choose based on the installation method. Using the wrong cable for the environment (e.g. CV underground) leads to failure. Match the cable to the job first, then compare price within suitable options.
