RVVP 2x4.0mm² Braided Copper Shielded Servo Motor Power Cable High Load EMI Protection 300/500V

RVVP 2x4.0mm² Braided Copper Shielded Servo Motor Power Cable High Load EMI Protection 300/500V

Cable Designation & Meaning

Construction: Two 4.0 mm² fine-stranded copper conductors, PVC insulation on each core, laid up together, tinned copper braid shield (≥80% coverage) over the laid-up cores, PVC outer sheath.

Applicable Standards

• GB/T 5023.5-2008 / IEC 60227-5 — Polyvinyl chloride insulated cables — Flexible cables (cords)
• GB/T 3956-2008 / IEC 60228 — Conductors of insulated cables (Class 5 flexible)
• GB/T 18380.3 / IEC 60332-3 — Flame retardant (Category A/B/C as specified)
• GB/T 5023.2-2008 / IEC 60227-2 — Test methods

RVVP 2×4.0 mm² — Flexible Shielded Power Cable

1. Overview & Ratings

RVVP 2×4.0 is a shielded power cable rated 450/750 V — the largest standard RVVP 2-core size. It uses pure annealed bare copper (not tinned) for both the conductor and braid, maximizing conductivity. Two 4.0 mm² cores carry up to 28–35 A for motor feeds, main power runs on large machines, and auxiliary power to sensitive equipment. The 85% pure copper braid suppresses EMI/RFI so that power circuits run alongside electronics without noise coupling. OD ≈ 11.5 mm, ≈ 135 kg/km (est.). Max conductor temperature 70 °C, -15 to +70 °C. Intended for dry indoor environments; for damp or outdoor duty, specify tinned copper variant. Not for mains distribution or direct burial.

2. Construction Stack (Inner → Outer, expanded)

3. Electrical Characteristics

DC resistance ≤ 4.61 Ω/km at 20 °C per GB/T 3956 — roughly 38% lower than the 2.5 mm² variant, cutting voltage drop to ≈ 0.46 V per 100 m at 10 A. Rated voltage 450/750 V. Estimated ampacity ≈ 28–35 A in free air at 30 °C. Insulation resistance ≥ 25 MΩ·km. Routine AC withstand test at 2500 V for 5 minutes. Typical capacitance ≈ 190 pF/m at 1 kHz. The pure copper braid has lower resistance than tinned braid, reducing transfer impedance and improving shielding at higher frequencies. Suitable for motor feeds and 220 V AC auxiliary power runs up to 30–50 m.

Insulation & Sheath Data

Electrical Parameters

Reference values: RVVP 2×4.0 at 25 A per core, 24 V DC → max load ≈ 600 W​ per core (medium-low-power device supply). At 230 V AC → max load ≈ 5,750 VA​ per core (light power use).

4. Thermal & Flame Behaviour

Operating range -15 to +70 °C continuous. Short-circuit withstand up to 160 °C for ≤ 5 seconds. PVC insulation and jacket are flame-retardant per IEC 60332-1. The cable is halogen-containing (PVC), emitting HCl gas on burning — avoid in enclosed switchrooms. For public or enclosed spaces, specify LSZH alternatives. The heavy 1.2 mm Type ST jacket provides robust oil and abrasion resistance for presses, machine tools and welding cells. Note: bare pure copper oxidizes in humid environments — install in dry indoor or conduit-protected locations. UV resistance is limited.

Temperature Characteristics

Fire Performance (RVVP — PVC, Non-Low-Smoke)

5. Installation Practice & Handling

Minimum bending radius ≥ 6×OD ≈ 69 mm for fixed installation; 12×OD ≈ 138 mm for drag-chain applications. The 4.0 mm² core and 11.5 mm OD make this the bulkiest RVVP 2-core variant — plan cable trays and bending allowance accordingly. Terminate the braid shield to earth via a robust shield gland or drain wire, as the cable carries higher power and fault energy. Use heavy-duty ferrules on the 56-strand conductor. Route at least 300 mm away from motor and VFD power cables. After installation, verify insulation resistance, shield continuity and polarity before energizing.

6. Typical Service Applications

Motor feed wiring between drive output and motor terminal, main power runs on large machines and production lines, auxiliary 24 V DC and 220 V AC power to control cabinets, power to solenoid valves and actuators in heavy-duty machinery, and interconnection between main distribution and field devices. The 4.0 mm² cross-section is the sweet spot for runs up to 30–50 m where current demand is 20–35 A and EMI protection is required — for example, near servo drives, robot cells and welding equipment. Not for: mains AC distribution, high-speed fieldbus, direct burial, outdoor UV exposure, or damp environments.

7. Testing & Quality Assurance Regime

Routine tests (100% production): DC resistance, AC voltage withstand (2500 V/5 min), insulation resistance, conductor construction, wall thickness, dimensional check, print legibility, mass per length, visual appearance, and packing. Type tests (per batch): shield coverage plus fault-current withstand, heat aging (100 °C/7 days), cold bend (-15 °C), jacket tensile, flame retardancy, and shielding effectiveness. Every drum ships with mill test certificate, ROHS and REACH declarations. The fault-current test is standard for power-grade RVVP.

Cable Parameters

Cable Test Parameters

Cable Cross Section Structure

Construction Description

8. Factory Advantages

Pure annealed copper conductor at 56×0.30 mm stranding delivers maximum conductivity (4.61 Ω/km) with Class 5 flexibility. Thicker 1.0 mm insulation and 1.2 mm heavy-duty jacket match the 450/750 V power rating. Pure copper braid at ≈ 85% coverage offers lower transfer impedance than tinned braid. Low DC resistance minimizes voltage drop on longer power runs. Heavy-duty oil-resistant Type ST jacket for press and machine tool duty. 100% routine electrical QA on every drum. Cut-to-length on wooden drums. Full traceability with MTC and certification support for industrial machinery tenders.

9. Packaging, Storage & Logistics

Cut to customer-specified length on export-grade wooden drums, with both ends heat-sealed. At ≈ 135 kg/km, drums are essential for lengths over 100 m to avoid coil distortion and cable damage. Drums wrapped in waterproof film and corrugated cardboard, labelled with product type, core count, cross-section, length, weight, production date and drum number. Standard lengths 100/200/500/1000 m. Store dry indoor, -10 to +40 °C, below 75% RH, away from direct sunlight and chemical solvents. FOB Shanghai/Nanjing/Qingdao; CIF and DAP available. Sample lead time 5–7 days; bulk production 15–25 days.

10. Procurement Specification

State cable designation "RVVP 2×4.0 pure copper", required length per drum, and core colour preference. Request the routine AC withstand test record (2500 V), shield coverage certificate, and fault-current test result. Note that this is a pure copper (bare) variant for dry indoor use — for damp or outdoor applications, specify the tinned copper variant. Specify any regional certification requirements (UL 2464, CE, etc.) at order time. Payment: 30% T/T deposit, balance against B/L copy. Documents: MTC, ROHS/REACH, COO, commercial invoice, packing list. For drag-chain duty, specify RVVSP variant.

11. Cable Industry FAQ

Q1: Why pure copper instead of tinned? Bare pure copper has slightly higher conductivity than tinned copper (lower resistance), making it ideal for indoor power circuits where corrosion is not a concern.

Q2: Where should I NOT use bare copper? Damp or humid environments, outdoor exposure, or anywhere moisture may cause oxidation — specify tinned copper variant instead.

Q3: What is the current rating? ≈ 28–35 A in free air at 30 °C; derate in bundles or conduits.

Q4: Can it power motors? Yes — it is designed for motor feeds and heavy-duty auxiliary power up to 35 A at 450/750 V.

Q5: What is the voltage drop at 10 A? ≈ 0.46 V per 100 m — roughly half the drop of 2.5 mm², ideal for longer power runs.

Q6: How does the pure copper braid compare? Pure copper braid has lower resistance than tinned braid, reducing transfer impedance and improving shielding performance at higher frequencies.

Q7: Is it suitable for drag chains? Not as standard — specify RVVSP (flexible braid) variant for continuous-flex applications.

Q8: What is the bending radius? ≥ 6×OD ≈ 69 mm for fixed; 12× for moving applications.

Q9: What is the temperature range? -15 to +70 °C continuous.

Q10: What proof ships? Routine AC test record (2500 V) + shield coverage + fault-current test + MTC.

Q11: Why is the OD so large? The 11.5 mm diameter reflects the 4.0 mm² conductor, thicker insulation (1.0 mm), and heavy-duty 1.2 mm jacket required for power-grade service.