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41 A on three phases, 7/1.04 class 2 copper, 450/750 V. Four cores for 400 V feeders and motor runs, PVC insulated and sheathed, drawn on the Pilone line in Lahore.
Quoted per metre at the day's copper rate. Send the length in metres and your city and the coil figure comes back with it.
Check the coil before you pay for it
Every coil leaves our factory with a QR code printed on the packaging. Scan it and the factory record for that batch opens: brand, cable size, batch number, year of manufacture and conductor. Compare the batch number on screen with the one printed on your coil — if the two do not match, it did not come from us.
41 A on three phases — roughly 22.7 kW at 400 V.
6mm² 4 core standard cable carries 41 A with three conductors loaded, clipped direct at 30°C. On a 400 V three-phase supply that is 41 × 400 × 1.732 = 28.4 kVA, about 22.7 kW once a 0.8 power factor is allowed for. It is the size for a small sub-board feeder or a pump motor, behind a breaker rated below 41 A. The rate is quoted per metre at the day's copper price.
6mm² 4 core standard cable is rated 41 A with three loaded conductors on BS 7671 reference method C (clipped direct) at 30°C ambient; the same copper carries 46 A when only two conductors are loaded. Its conductors are class 2 stranded copper, seven strands of 1.04 mm each, resistance capped at 3.08 Ω/km by IEC 60228, voltage drop 7.3 mV per amp per metre. Derate all of it for conduit, grouping and ambient above 30°C, and have a licensed electrician confirm the size for the run.
| Property | Value |
|---|---|
| Conductor | Plain annealed copper, class 2 stranded |
| Nominal area | 6 mm² × 4 cores |
| Strand construction | 7 / 1.04 mm per core |
| Market strand code | 7/.044 (computes to 6.87 mm²) |
| Max conductor resistance at 20°C | 3.08 Ω/km |
| Current capacity (method C, 3 loaded) | 41 A |
| Current capacity (method C, 2 loaded) | 46 A |
| Voltage drop | 7.3 mV/A/m |
| Voltage rating | 450/750 V |
| Insulation / sheath | PVC / PVC, 70°C conductor rating |
| Conductor copper weight | 213 kg/km (4 × 53.3 kg/km) |
| Copper in a 90 m coil | 19.2 kg |
| Reference standards | IEC 60228 (conductors), IEC 60227 (PVC cables) |
Long feeders fail on voltage drop before they fail on heat. Take it phase to neutral, which is the conservative way to do it by hand: a 30 A feeder run 40 m on 6mm² drops 30 × 40 × 7.3 ÷ 1000 = 8.8 V, against the 11 V that BS 7671's 5% allowance gives on a 220 V phase. Push the same feeder to 60 m and the drop is 13.1 V, over the line, and the answer is 10mm 4 core standard cable at 4.4 mV/A/m. Run your own numbers in the voltage drop calculator, or read the sizing rules on three-phase cable size.
Two quotes for the same cable are not comparable until you know the unit. Shops in this market price per foot, per metre, and per coil, and coil is not a fixed quantity: 30 m, 45 m and 90 m packs are all sold, some sellers quote 301 ft, and some sell 80-yard lengths. The table below turns each pack into metres, feet, and the weight of copper inside it.
| Pack | Length | In feet | Copper inside |
|---|---|---|---|
| Cut length | 1 m | 3.281 ft | 0.21 kg |
| Half coil | 45 m | 148 ft | 9.6 kg |
| Full coil | 90 m | 295 ft | 19.2 kg |
| 301 ft coil | 91.7 m | 301 ft | 19.6 kg |
Use it as a check you can run yourself. Copper weighs 8.89 kg per km for every mm², so 6 mm² across four cores is 24 × 8.89 = 213 kg per km, and 9% of a kilometre is a 90 m coil holding 19.2 kg of bare copper. A real coil weighs more than that once the PVC is counted; it should never weigh less. That is a method, not an accusation against any seller. More conversions on the price per metre page.
Feeder from a main panel to a smaller board — three phases plus neutral in one sheath.
Three-phase pumps and small machines up to about 22.7 kW at 400 V and 0.8 power factor.
Floor-to-floor distribution on trays and in trunking, where each floor takes a different phase.
Buyers arrive with a kW figure from a machine plate, not an amp figure. Three steps convert one to the other on a 400 V three-phase supply.
41 A × 400 V × 1.732 = 28.4 kVA. The 1.732 is the root-three factor for three-phase.
28.4 kVA × 0.8 = 22.7 kW. Use the power factor printed on the motor plate, not 0.8, when you have it.
The breaker sits below the cable: a 32 A three-phase MCB under a 41 A cable, not the other way round.
Work backwards for your own machine: divide the plate kW by 0.8 to get kVA, then by 1.732 × 400 to get amps. A 15 kW motor is 15 ÷ 0.8 = 18.75 kVA, and 18,750 ÷ (1.732 × 400) = 27 A — comfortably inside 6mm² before derating, and worth checking against the run length for voltage drop.
| Cable | Current | Where it goes |
|---|---|---|
| 6mm 4 core standard cable (this page) | 41 A | Three phases and neutral at 400 V |
| 6mm 3 core standard cable | 46 A | Single phase with its own earth core |
| 6mm 2 core standard cable | 46 A | Line and neutral only, earth taken separately |
| 4mm 4 core standard cable | 32 A | One size down: light three-phase runs |
| 10mm 4 core standard cable | 57 A | One size up: longer feeders and bigger motors |
| 6mm 4 core flexible cable | 41 A | Class 5, for machine tails and portable panels |
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