KVVR Flexible Control Cable — GB/T 9330 Copper Core PVC Insulated PVC Sheathed Flexible Multi-Core Control Cable with Class 5 Stranded Conductor, Numbered Cores, 450/750 V Rating for Industrial Control Panels, Machine Tool Wiring, Conveyor System Control, and Building Automation Interconnection
Industrial, Mining & Control Cables /KVVR Control Cable

KVVR Flexible Control Cable — GB/T 9330 Copper Core PVC Insulated PVC Sheathed Flexible Multi-Core Control Cable with Class 5 Stranded Conductor, Numbered Cores, 450/750 V Rating for Industrial Control Panels, Machine Tool Wiring, Conveyor System Control, and Building Automation Interconnection

KVVR flexible control cable: GB/T 9330, copper core PVC insulated PVC sheathed, Class 5 flexible copper, 450/750V. 2-61 cores, 0.5-10 mm². Numbered cores, optional shield (KVVRP). For control panels, machine tools, conveyors, building automation. Flame retardant. CCC, CE, RoHS.

Key Features

GB/T 9330 compliant — the Chinese national standard for PVC insulated and sheathed control cables; the K (控制 Kòngzhì) in KVVR designates 'control cable', VV designates PVC insulation and PVC sheath, and R (柔软 Róuruǎn) designates flexible Class 5 stranded copper conductor — the standard flexible control cable for the Chinese and Asian industrial markets
KVVRP shielded variant — identical KVVR cable with the addition of a tinned copper braid shield (≥80% coverage); the 'P' (屏蔽 Píngbì) suffix designates the shielded type; specified for control cables sharing cable trays with power cables in factory and process plant installations where EMI protection is required
450/750 V rated voltage — a higher voltage rating than the 300/500 V European equivalent (VDE 0812/0815), providing additional insulation margin for the 220/380 V AC control circuits common in Chinese industrial electrical systems where contactor coils and control transformers operate at 220 V or 380 V AC
Class 5 flexible stranded bare copper conductor — the flexible stranding is the defining feature of the 'R' (KVVR) type; the cable is designed for control panel internal wiring where the cable must be routed through the confined space of the panel between the trunking, terminals, and devices, requiring the flexibility that solid (KV) or stranded (KVV) conductors cannot provide
Numbered white or black cores — the core numbering follows the GB/T 9330 standard identification system; the core number is printed along the core insulation; the numbering is essential for control panel wiring where each core connects to a specific terminal per the electrical schematic, and misidentification of a core number causes wiring errors
2–61 cores, 0.5–10 mm² — the standard control cable cross-section and core count range per GB/T 9330; the range covers all standard industrial control applications from simple 2-core circuits to complex multi-core I/O marshalling cables
Flame retardant PVC insulation and sheath — the PVC compound is formulated with flame-retardant additives per GB/T 18380 (equivalent to IEC 60332-1-2); the cable self-extinguishes when the flame source is removed; flame retardance is mandatory for control cables in industrial control panels where a cable fire could destroy the panel's entire control system
CCC (China Compulsory Certification) certified for the Chinese domestic market — KVVR and KVVRP control cables sold in China must carry the CCC mark; Yichi KVVR cables are CCC-certified, meeting the mandatory safety requirements for control cables in the Chinese market

Applications

Industrial control panel internal wiring — KVVR cable for the point-to-point connections inside motor control centres, PLC panels, and distribution boards; the flexible Class 5 conductor routes easily through the panel trunking and the numbered cores simplify the wiring and fault-finding processMachine tool and production machinery control — multi-core KVVR cable connecting the machine's operator panel, limit switches, pushbuttons, solenoid valves, and indicator lamps to the control cabinet; the cable's flexibility accommodates the routing through the machine's articulated cable management systemConveyor and material handling system control — KVVR cable for the distributed control circuits along conveyor lines connecting motor starters, position sensors, pull-wire emergency stops, and belt alignment switches back to the main control panelBuilding automation and HVAC control — KVVR cable for the DDC (direct digital control) panel connections to VAV box controllers, damper actuators, temperature sensors, and valve actuators in commercial building automation systemsPower plant and substation control — KVVRP screened cable for the control and protection circuits in power generation and substation switchgear where the cable routes through cable trenches and trays alongside medium and high voltage power cables, requiring the EMI protection of the overall screenWater and wastewater treatment plant control — KVVR cable for the process control instrumentation and actuated valve control circuits in water and wastewater treatment plants

Technical Specifications

Standard GB/T 9330.2 (Plastic insulated control cables — Part 2: PVC insulated and sheathed control cables); the standard covers KVVR (flexible), KVV (stranded), KVVP (stranded screened), and KVVRP (flexible screened) types; the standard defines the conductor, insulation, core colour/identification, sheath, and test requirements
Type Designation — K System (Chinese Control Cable) K = 控制 Kòngzhì (control); V = PVC (聚氯乙烯 Jù Lǜ Yǐ Xī) insulation or sheath; R = 柔软 Róuruǎn (flexible Class 5 conductor); P = 屏蔽 Píngbì (screened with copper braid)
Type — KVVR Copper core, PVC insulated, PVC sheathed, flexible (Class 5) control cable — no screen
Type — KVVRP As KVVR with tinned copper braid screen (confusingly, the P suffix applies to the overall construction, not just the core — KVVRP means KVVR + screen)
Type — KVV (Non-Flexible) Copper core, PVC insulated, PVC sheathed, stranded (Class 2) control cable — for fixed installation where flexibility is not required and solid/stranded conductors are acceptable; lower cost than KVVR
Rated Voltage (U₀/U) 450/750 V (the standard Chinese control cable voltage class; higher than the 300/500 V European equivalent, reflecting the 220/380 V AC control circuit voltages common in Chinese industrial electrical systems)
Conductor Material Bare copper (standard); tinned copper on request for humid and corrosive environments; IEC 60228 Class 5 flexible stranded; single wire diameter 0.20–0.41 mm depending on cross-section
Conductor Cross-Sections — Standard Range 0.5, 0.75, 1.0, 1.5, 2.5, 4, 6, 10 mm²
Core Count — Standard Range 2, 3, 4, 5, 7, 10, 12, 14, 16, 19, 24, 27, 30, 37, 44, 48, 52, 61 cores per GB/T 9330 Table 2
Core Insulation — PVC PVC type J-70 (70°C) per GB/T 9330; the insulation thickness per the rated voltage and conductor cross-section per GB/T 9330 Table 3: 0.6 mm (0.5–1.5 mm²); 0.8 mm (2.5–6 mm²); 1.0 mm (10 mm²)
Core Identification — KVVR White cores with black printed numbers (the standard identification system per GB/T 9330); the numbering is sequential starting from 1; the number '1' may be in black and all other numbers in blue or vice versa, per the manufacturer's standard — the key requirement is that each core is uniquely and permanently identified
Core Identification — Alternative Colour-coded cores (black, brown, red, orange, yellow, green, blue, violet, grey, white) with numbered printing on request; the colour + number combination provides dual identification — the installer identifies the core by both colour and number
Core Assembly Concentric layering of the numbered cores around a central filler or core; each layer is stranded in alternating directions (S-lay then Z-lay) to balance the cable and prevent it from untwisting when cut; non-hygroscopic filler elements in the interstices maintain cable circularity
Binder Tape PVC or polyester tape wrap over the core assembly; provides a smooth surface for the screen (KVVRP) or sheath (KVVR) application
Overall Shield — KVVRP Tinned copper braid; ≥80% coverage per GB/T 9330; the drain wire is integrated into the braid construction for convenient termination; the screen provides EMI protection and must be earthed at one end (typically the control panel end) to prevent ground loop currents
Outer Sheath — PVC PVC type ST5 (flexible) per GB/T 9330; black RAL 9005 (standard industrial); grey or other colours on request; the sheath thickness per GB/T 9330 Table 6 calculated from the diameter over the core assembly or screen
Maximum DC Conductor Resistance at 20°C — Copper Per GB/T 3956 (equivalent to IEC 60228 Class 5); 39.0 Ω/km (0.5 mm²) to 1.83 Ω/km (10 mm²)
Insulation Resistance at 20°C — PVC ≥20 MΩ·km (core-to-core at 500 V DC, 1 min) per GB/T 9330
Test Voltage (AC) — Routine 3 000 V AC / 5 min (core-to-core) for 450/750 V rated cable per GB/T 9330; the test voltage is higher than the 2 000 V required for 300/500 V cable, reflecting the higher voltage rating
Temperature — Continuous 70°C conductor temperature (PVC type J-70)
Temperature — Installation (Minimum) 0°C (PVC becomes brittle below this temperature; do not install PVC-sheathed control cable at sub-zero temperatures without pre-warming)
Temperature — Fixed (After Installation) -15°C to +70°C
Minimum Bend Radius — KVVR (Unscreened) 8× cable OD (flexing during installation); 6× cable OD (fixed routing)
Minimum Bend Radius — KVVRP (Screened) 12× cable OD (flexing); 8× cable OD (fixed routing); the larger bend radius for the screened type accommodates the braid screen
Current Rating — Single Core in Multi-Core Cable (Typical, 30°C Ambient, PVC 70°C) 0.5 mm² = 3 A; 0.75 mm² = 6 A; 1.0 mm² = 10 A; 1.5 mm² = 16 A; 2.5 mm² = 25 A; de-rate for core count per GB/T 16895 (equivalent to IEC 60364-5-52)
Flame Retardant GB/T 18380.12 (equivalent to IEC 60332-1-2); single cable vertical flame test; the PVC compound is inherently flame-retardant
Certifications CCC (China Compulsory Certification — mandatory for the Chinese domestic market); CE; RoHS; ISO 9001 manufactured; GB/T 9330 type test certificate available on request

Detailed Description

What Is KVVR Flexible Control Cable?

KVVR is the Chinese national standard designation for a flexible (R — 柔软 Róuruǎn) multi-core control cable with PVC insulation (V) and PVC sheath (V), defined by GB/T 9330.2. The designation tells the cable's complete construction at a glance:

  • K (控制 Kòngzhì) — Control cable (the application)
  • V (聚氯乙烯 Jù Lǜ Yǐ Xī) — PVC insulation on each core
  • V — PVC outer sheath
  • R (柔软 Róuruǎn) — Flexible Class 5 stranded copper conductor
KVVR is the Chinese market equivalent of the European VDE 0815 / ÖLFLEX unscreened control cable, but with a higher voltage rating (450/750 V vs 300/500 V) reflecting the higher control circuit voltages (220/380 V AC) common in Chinese industrial electrical systems. The KVVRP variant adds a tinned copper braid screen (P — 屏蔽 Píngbì) for EMI protection — the direct equivalent of the European VDE 0812 / ÖLFLEX screened control cable.

KVVR vs KVV — Flexible vs Non-Flexible

ParameterKVVR (Flexible)KVV (Non-Flexible)
Conductor classIEC 60228 Class 5 (flexible stranded)IEC 60228 Class 2 (stranded)
FlexibilityGood — routes easily through panel trunking and conduit bendsModerate — holds its shape, suitable for straight fixed cable tray runs
TerminationFerrule recommended for screw-clamp terminals; can be terminated directly in cage-clamp terminals up to 2.5 mm²Direct termination in screw and cage-clamp terminals without ferrule
CostHigher (the additional stranding step)Lower
Best forControl panel internal wiring, machine tool connections, any application where the cable is routed through confined spacesFixed installation on cable tray and in conduit where the cable is pulled once and never moves
Minimum bend radius8× cable OD10–12× cable OD

The 'R' in KVVR is the key differentiator — it specifies a flexible conductor for applications where the cable must be bent, routed, and connected in confined spaces. KVV (without the R) is a stranded conductor control cable for fixed, straight-run installations. The cost difference is modest, and KVVR is the default specification for any control panel or machine tool wiring where the installer routes the cable through the panel trunking during assembly.

Why Choose Yichi KVVR Flexible Control Cables

  • GB/T 9330 compliant with CCC certification — mandatory for the Chinese market: The cable is manufactured to the Chinese national standard and carries the CCC (China Compulsory Certification) mark. For control cables sold and installed in China, CCC certification is a legal requirement — a non-CCC cable cannot be legally sold or installed in a Chinese industrial facility
  • 450/750 V rated — higher voltage margin than the European equivalent: The 450/750 V rating provides additional insulation safety margin for the 220/380 V AC control circuits standard in Chinese industrial electrical systems. The higher rating also provides margin for the switching transients that occur when contactor coils and relay coils are de-energised — the inductive voltage spike can reach several times the nominal control voltage
  • KVVR and KVVRP — unscreened and screened from the same manufacturer: Select the cable for the installation's EMI environment. KVVR for dedicated control cable routes; KVVRP for cable trays shared with power cables. Both types manufactured with the same core construction, numbering system, and PVC materials — consistent quality and consistent dimensional tolerances
  • Numbered cores per GB/T 9330 — white cores with permanent black print: The standard Chinese control cable identification system. The numbering is permanent — printed with durable ink that does not smudge, rub off, or become illegible during cable stripping and termination. The installer identifies each core by the number printed on the white insulation at the stripped conductor end
  • Meter marking on the sheath — measure cable length from the reel: Sequential meter numbers printed on the outer sheath enable accurate cable length measurement directly from the reel, reducing installation waste and enabling accurate stock control

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Product: KVVR Flexible Control Cable — GB/T 9330 Copper Core PVC Insulated PVC Sheathed Flexible Multi-Core Control Cable with Class 5 Stranded Conductor, Numbered Cores, 450/750 V Rating for Industrial Control Panels, Machine Tool Wiring, Conveyor System Control, and Building Automation Interconnection

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