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Three 2.5 mm² class 5 conductors — line, neutral and earth — 50 strands of 0.25 mm each, PVC insulated and sheathed to 300/500 V. 27 A with the two current-carrying cores loaded on reference method C, 18 mV/A/m, 7.98 Ω/km. This is the earthed flex for a single-phase machine that has to be moved, plugged in or dropped down a bore: pump leads, irons, washing machines, site tools. The trade still orders this size by the old code 7/.029. Drawn on the Pilone line in Lahore.
Prices track the daily copper rate. Bulk and coil pricing on request.
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.
| Property | Value |
|---|---|
| Conductor | Plain annealed copper, class 5 flexible stranded |
| Nominal area | 2.5 mm² × 3 cores |
| Strand construction | 50 / 0.25 mm per core (typical) |
| Max conductor resistance at 20°C | 7.98 Ω/km |
| Current capacity (method C, 2 loaded) | 27 A |
| Voltage drop | 18 mV/A/m |
| Voltage rating | 300/500 V |
| Insulation / sheath | PVC / PVC, 70°C conductor rating |
| Conductor copper weight | ≈ 66.6 kg/km (3 × 22.2 kg/km) |
| Reference standards | IEC 60228 (conductors), IEC 60227 (PVC flexible cables) |
Control panel down to a submersible or surface pump. Fifty 0.25 mm strands per core take the bending and the pull without the conductor breaking up.
Irons, washing machines, water coolers and kitchen equipment — anything with a metal body that needs its earth inside the same sheath.
Three-pin extension boards, grinders and drills, where the lead is coiled and uncoiled every day.
Three core here means line, neutral and earth — not three phases. The earth core is the reason people buy this build rather than the two-core: every appliance with a metal body needs one, and running it separately down a bore or along a tool lead is not practical. Two cores carry current and the earth does not, which is why the rating is the 27 A two-loaded figure and not the three-phase one. At 27 A that is about 5.9 kW on a 220 V single-phase supply (220 × 27 ÷ 1000). If the earth is already at both ends, 2.5mm 2 core flexible cable does the job with less copper; for a bigger pump or a longer drop, step up to 4mm 3 core flexible cable at 32 A. One caution on the name: this is 2.5 mm², not 25 mm² — the submain size is 25mm 3 core standard cable.
Worked example — a 6 A pump 40 m from the panel.
Voltage drop is current × length × the tabulated 18 mV/A/m, divided by 1000. So 6 × 40 × 18 ÷ 1000 = 4.3 V, which is 2.0% of 220 V — inside the 5% BS 7671 allows on a power circuit, 11 V here. Load the same lead to its full 27 A and the 11 V budget is spent at 11 ÷ (27 × 18 ÷ 1000) = 22 m. On a deep bore the length runs out long before the current does — check yours with the voltage drop calculator.
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