Direct answer: They are not the same cable and cannot be used as direct substitutes. Both are copper-core, circular-sheathed low-voltage cables with the same 6 mm² conductor, but the insulation material, voltage rating, long-term temperature rating, applicable standard and flame-retardant grade are all different — Korean projects cannot replace TFR-CV with domestic BVV.
Further reading: TFR-CV 6sq Korean Tray Flame Retardant Power Cable · KS C IEC 62930 Korean PV DC Cable Standard · Cable Export Certifications Hub · Cable Manufacturer Directory
Core Comparison Table
| Item | Korean TFR-CV 6sq | Chinese BVV 6sq |
|---|---|---|
| Standard | KS C IEC 60502-1 (Korean power cable) | GB/T 5023 (Chinese building wire) |
| Voltage rating | 0.6/1 kV AC | 300/500 V AC |
| Insulation | XLPE (cross-linked polyethylene) | PVC (polyvinyl chloride) |
| Max. conductor temp | 90 °C | 70 °C |
| Sheath | FR-PVC flame-retardant sheath (Tray Flame Retardant grade) | Ordinary PVC sheath (no mandatory tray FR for plain BVV) |
| Conductor | Class 2 compacted stranded hard copper | Class 1 solid hard copper (also multi-core stranded versions) |
| Positioning | Industrial tray-laid LV power cable; PV inverter AC output, factory distribution | Building / residential wiring; indoor conduit, exposed lighting & power |
| Certification | KC/KS (mandatory for Korean projects) | CCC (China 3C) |
Key Differences Explained
1. Insulation Material & Temperature (the biggest gap)
TFR-CV uses XLPE (cross-linked polyethylene) insulation, rated 90 °C — higher current carrying capacity and better anti-aging. BVV uses PVC insulation, capped at 70 °C, with larger current derating in high-temperature environments.
2. Voltage Rating
- TFR-CV: 0.6/1 kV — suitable for 1 kV low-voltage distribution circuits.
- BVV: 300/500 V — only for conventional residential lighting/power below 400 V; not usable in 1 kV distribution circuits.
3. Flame Retardancy
TFR = Tray Flame Retardant — TFR-CV leaves the factory already meeting tray flame-retardant tests, a hard requirement for Korean solar plants and factory tray installations. Plain BVV is not flame-retardant by default; only ZR-BVV has flame-retardant properties, and its FR system differs from the Korean TFR tray-flame-retardant standard.
4. Application Boundary
- ✅ TFR-CV: Korean PV AC side, factory tray wiring, plant power distribution
- ✅ BVV: Chinese residential, indoor fixed wiring of buildings
- ❌ Korean EPC projects — submitting BVV will fail acceptance, as it does not meet the KEC electrical code
FAQ
Q1: Can TFR-CV 6sq and BVV 6sq be used as direct substitutes? A: No. Both are 6 mm² copper circular-sheathed cables, but the insulation (XLPE vs PVC), voltage rating (0.6/1 kV vs 300/500 V), long-term temperature (90 °C vs 70 °C), flame-retardant grade and standards differ — they belong to different product systems and cannot be swapped directly.
Q2: Why is BVV's voltage rating much lower than TFR-CV's? A: BVV per GB/T 5023 is a building wire designed for 300/500 V residential lighting/power circuits; TFR-CV per KS C IEC 60502-1 is a power cable designed for 0.6/1 kV distribution. Voltage class drives insulation thickness and test requirements — BVV must not be used in 1 kV distribution circuits.
Q3: Does plain BVV have flame-retardant properties? A: Plain BVV is not flame-retardant by default; only ZR-BVV (flame-retardant type) has FR properties, and its FR test system differs from the Korean TFR tray-flame-retardant standard. Korean tray projects require the TFR grade; plain or even ZR-BVV usually fails KEC acceptance.
Q4: Can BVV pass acceptance in Korean projects? A: No. Korean EPC projects require KS C IEC 60502-1 with KS (KC) certification. BVV belongs to the Chinese GB/T 5023 + CCC system and does not satisfy the KEC electrical code, so it cannot pass acceptance. Quote TFR-CV, not BVV, for Korean projects.
Q5: How do the conductor structures of TFR-CV and BVV differ? A: TFR-CV uses a Class 2 compacted stranded hard-copper conductor, suited to tray routing and moderate bending; BVV commonly uses a Class 1 solid hard-copper conductor (also multi-core stranded versions), oriented to fixed wiring. The conductor class also affects installation method and flexibility.
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