Multi Core Control Cable 5 Core 0.75mm² RVV for Building Automation

Cable Designation & Meaning

Construction: Light PVC sheathed flexible cord, round profile (5-core)

Note: RVV 5×0.75 is a light PVC sheathed flexible cord per GB/T 5023.5 / IEC 60227-5. Conductor is Class 5 fine-stranded flexible copper. 5-core configuration is commonly used for control circuits, instrumentation, and low-current multi-conductor applications requiring 5 separate conductors. 5-core RVV is normally round profile. This is the smallest standard gauge in the RVV 300/500 V 5-core series.

RVV 5×0.75 mm² — Cable Specification & Engineering Data 

1. Product Overview & Rating Summary. RVV 5×0.75 is a five-core flexible PVC-insulated PVC-sheathed cord rated at 300/500 V AC (50 Hz) and 70 °C conductor temperature, built around five equal 0.75 mm² annealed copper Class 5 flexible conductors — each PVC-insulated and collectively jacketed in a second PVC oversheath. Manufactured and type-tested to GB/T 5023.5 (60227 IEC 53) / IEC 60227-5, with flexible conductors per GB/T 3956. Finished diameter is about 10.1 mm and nominal mass about 110 kg/km (≈ 11 kg per 100 m), supplied on 100 m reels or cartons. With all five cores energised, the cord carries about 6 A in free air at 25 °C (engineering estimate) — a compact multi-core flexible cord for low-current signal, control and light-power circuits where five independent conductors are routed in one sheath, such as sensor loops, inter-instrument wiring and small appliance internal leads.

2. Layer-by-Layer Construction (Conductor to Jacket).

3. Electrical Characteristics. Each 0.75 mm² conductor is held to a maximum DC resistance of 26.0 Ω/km at 20 °C, rising to around 33.0 Ω/km at the 70 °C operating point. Every length survives the routine 2.0 kV AC power-frequency proof held for five minutes. Finished-cable insulation resistance remains above 0.012 MΩ·km at 70 °C, and typical figures include per-core capacitance ≈ 110 nF/km and 50 Hz AC impedance ≈ 26.0 Ω/km (R-dominant, reactance negligible at this small cross-section). With all five cores energised, reference loading is about 6 A in free air at 25 °C, and the loop voltage drop at 6 A is about 0.31 V per metre.

Electrical Parameters

Reference values: RVV 5×0.75 — typical current carrying capacity 4–7 A per core depending on bundling, ambient temperature, and reference standard. For 3-phase+N+PE at 400 V, max balanced load ≈ 4.9 kW (7 A per phase). Voltage drop at 7 A is ~23.2 V/km per core (~5.8% per 100 m at 400 V line-to-line, so limit run length to ~30 m for 7 A per phase).

4. Thermal Response & Flame Behaviour. PVC insulation sustains a 70 °C continuous conductor temperature. The cord is rated for service ambients between −15 and +70 °C, must not be uncoiled below 0 °C without pre-conditioning, and uses 25 °C as the reference ambient for ampacity. Flame behaviour meets the single-cable vertical test GB/T 18380.12 (IEC 60332-1), meaning the cord self-extinguishes when the flame source is removed. Because both insulation and sheath are halogenated PVC, the cord emits smoke and hydrogen chloride in a fire; low-smoke zero-halogen projects must specify an LSZH variant.

Temperature Characteristics

• Max. conductor operating temp.: 70 °C
• Max. short-circuit temp. (≤5 s): 160 °C
• Emergency overload temp.: 85 °C
• Min. installation ambient temp.: −15 °C (PVC flexible, cold-bend limited)
• Service ambient range: −15 °C to +70 °C (PVC sheath)
• Flame retardant: general PVC (not ZR rated unless specified)

Fire Performance (RVV)

For low-smoke halogen-free → use RVVZ variants (LSZH sheathed) or H05Z-K

For flame-retardant → specify ZR-RVV (less common)

For higher temp → use silicone rubber or XLPE insulated flex

For heavier duty → use YCW, YZW, or H07RN-F (rubber sheathed, 450/750 V)

5. Installation Practice & Handling. Bends must not fall below 6 times the actual outer diameter — about 61 mm for this size. Termination requires stripping 10–12 mm and always using a ferrule on the flexible Class 5 strands to prevent wire fraying. Reels held below 0 °C in storage must be warmed indoors before uncoiling; pulling tension should stay within 56 N, and the cord must never be used as a pulling rope. The 6 A reference requires derating whenever ambient temperature or bundling deviates from reference conditions. This cord is not for direct burial, outdoor UV exposure or continuous repetitive flexing — for those duties choose an armoured cable, a UV-stabilised jacket or a continuous-flex (trunking) cable respectively.

Mechanical & Installation Parameters

• Minimum bending radius: ≥ 6 × OD (flexible cord) → ≈ 44 mm at Ø7.4 mm
• Max. pulling tension: light, avoid pulling; use strain relief gland
• Direct burial: NOT suitable (light sheath, no armour)
• Conduit ID: ≥ 1.5 × OD → ≥ 11 mm; use 16 mm conduit
• Fixing: cable clips, cable ties; not for tray (light cord)
• Flexing: suitable for light flexing, not continuous flexing (use drag-chain cable for continuous flex)
• Elevation: no limit

6. Typical Service Applications. This five-core 0.75 mm² cord is the compact multi-conductor lead for low-current control, signal and light-power circuits: temperature and pressure sensor wiring, PLC / DCS I/O signal cables, communication and instrumentation interconnects, small appliance internal power and control leads, LED lighting and driver supply wiring, security and access-control panel wiring, door intercom and video-doorbell leads, audio / signal cable bundles, control panel and enclosure internal wiring, small pump and solenoid valve control circuits, motor auxiliary and limit-switch leads, vending and arcade machine internal wiring, test-equipment bench leads, and light-duty industrial control cabinet interconnects. Approved installation methods include fixed wiring inside appliances, cable trunking and indoor ducting in dry locations, both indoors and in covered sheltered spaces.

7. Testing & Quality Assurance Regime. Routine tests on every length include conductor DC resistance verification (≤ 26.0 Ω/km) at 20 °C, the 2.0 kV AC / 5 min withstand, insulation resistance ≥ 0.012 MΩ·km at 70 °C, conductor continuity across all five cores, and dimensional inspection covering insulation ≥ 0.60 mm, sheath ≥ 1.00 mm and overall diameter ≈ 10.1 mm. Sample and type tests comprise PVC insulation and sheath tensile strength (≥ 10 MPa) with elongation (≥ 100 % insulation / ≥ 125 % sheath), PVC heat deformation at 80 °C, PVC shrinkage at 150 °C, the single-cable vertical flame test, bending and cold-bend tests at −15 °C, and the voltage test after flexing. A factory test certificate accompanies each reel.

Cable Parameters

Cable Test Parameters

Cable Cross Section Structure

Cable Construction Description

8. Standards & Conformity. Design and production are governed by GB/T 5023.5 and IEC 60227-5 for 300/500 V flexible cords (60227 IEC 53). Conductors satisfy GB/T 3956 / IEC 60228 Class 5 — the 0.75 mm² conductor as 24 wires of 0.20 mm (R ≤ 26.0 Ω/km). Flame behaviour is proven by GB/T 18380.12. General test methods follow GB 5023.1 / GB 5023.3, while surface marking complies with GB/T 6995. Cables can also be supplied to IEC, BS, DIN, UL or VDE requirements on request. Because the PVC jacket contains halogen, tunnels, metro systems, hospitals and other confined public areas call for an LSZH variant.

9. Packaging, Storage & Logistics. Standard delivery is 100 m per reel or carton, with bespoke cut lengths available on request. Each reel carries type, voltage, supplier identity, production year and sequential metre marking per GB/T 6995. Storage should be in dry, covered premises at −15 to +40 °C, shielded from direct sunlight, moisture, oils and sharp objects; reels remain sealed until installation. In cold conditions, condition reels indoors to ≥ 0 °C before uncoiling. During transit, reels must be secured against rolling and impact, and the cord must never be dragged across abrasive ground or sharp edges.

10. Procurement Specification. State "RVV 300/500 V 5×0.75" together with the required length or reel arrangement, insulation colour combination and marking preferences. Specify the sheath colour (black is standard) and the five-core colour-coding (black, red, blue, yellow, yellow-green as standard). Always request the factory test certificate to confirm the actual diameter (≈ 10.1 mm), weight (≈ 110 kg/km) and conductor resistance (≤ 26.0 Ω/km) for the production batch. Where low-smoke zero-halogen or continuous-flex construction is needed, order the LSZH or H05VV5-F variant respectively.

11. Cable Industry FAQ.

• Q1: Why use five equal 0.75 mm² cores instead of a multi-core data cable? RVV 5×0.75 is a general-purpose flexible power/signal cord: it carries both small AC power and low-level signals, has PVC insulation that tolerates rough handling, and is far cheaper and more robust than shielded data cable. For high-speed or noisy signals (RS-485, Ethernet, thermocouple), use shielded or specialised instrument cable instead.
• Q2: Can this cord carry 24 V DC control signals over 100 m? Yes — at 6 A capacity the loop voltage drop at 6 A is about 0.31 V/m, but for milliamps-level control signals the drop is negligible. 24 V DC / 100 m at < 1 A is well within limits; always confirm the receiver's minimum voltage threshold.
• Q3: What does Class 5 flexible conductor mean at 0.75 mm²? Class 5 (GB/T 3956) uses 24 thin wires of 0.20 mm rather than a single solid 1.0 mm wire. This gives the cord its flexibility and bend endurance — essential for appliance leads and control wiring that may be flexed during installation.
• Q4: Why is 0.75 mm² rated at only about 6 A? Cross-section directly determines current-carrying capacity. 0.75 mm² is a light-duty signal/control cross-section; 1.0 mm² already carries about 10 A and 1.5 mm² about 14 A. Oversizing unnecessarily increases cost, diameter and copper weight.
• Q5: Can RVV be used outdoors? Not in its standard form: the PVC jacket is not UV-stabilised and will degrade under prolonged sunlight. For outdoor use specify a UV-stabilised jacket or an armoured cable. For burial, use a steel-tape armoured power cable.
• Q6: Why five cores and not four? Five cores allow one extra independent circuit compared with four-core cords — e.g. live, neutral, earth, plus two signal/control wires — all in one sheath. This reduces conduit fill and installation time for sensor, intercom or multi-signal applications.
• Q7: What is the difference between flexible (Class 5) and solid (Class 1) conductors? Solid Class 1 conductors (single wire) are cheap and rigid, suitable for fixed wall wiring. Flexible Class 5 conductors (many fine wires) bend easily and resist fatigue from repeated movement — essential for appliance leads, patch cords and control cabinet wiring.
• Q8: Why can PVC only run at 70 °C while XLPE runs at 90 °C? PVC is a thermoplastic that softens and deforms at elevated temperature; XLPE is cross-linked into a thermoset network that retains its shape up to 90 °C. This is why RVV (PVC) is limited to 70 °C and YJV (XLPE) to 90 °C.
• Q9: Why does finished diameter vary between manufacturers for the same nominal size? Standards set minimum insulation and sheath thicknesses plus electrical performance, but not a precise overall diameter. Stranding compaction, filler design and sheath tolerance differ between plants — published 5×0.75 figures cluster around 10.1 mm — so the actual measured diameter must be used when sizing glands and clips.
• Q10: Which tests confirm acceptability on delivery and before energisation? At delivery, verify the factory test certificate (conductor resistance ≤ 26.0 Ω/km, 2.0 kV/5 min withstand, dimensions ≈ 10.1 mm), jacket legibility and reel integrity. After installation, complete an insulation-resistance test plus a 2.0 kV AC / 5 min withstand, then confirm all five conductors identified correctly before energising.
• Q11: What service life can be expected? When installed and operated within the stated temperature and voltage limits, PVC flexible cords are designed for a service life of around 10–15 years in dry indoor conditions; sustained overload, repeated flexing beyond the 6 × OD minimum radius, ultraviolet exposure, or operation above 70 °C will materially shorten that life.