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Single core stranded copper building wire, code 3/.029 — three strands of 0.029 inch wire, which computes to 1.28 mm². The trade sells that build as 1.5 mm², but 1.28 mm² is less copper than a 1.5 mm² conductor, so the 1.5 mm² reference figures cannot simply be assumed for it. Confirm the declared nominal size and maximum conductor resistance on the quotation. PVC insulated, 450/750 V. This is the lighting-circuit wire that gets pulled through conduit on a house job. 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, stranded (3/.029 in) |
| Calculated area | 1.28 mm² (3 × 0.426 mm²) |
| Trade name | Sold as 1.5 mm² |
| Calculated resistance at 20°C | ≈ 13.5 Ω/km (plain copper, 1.28 mm²; the IEC 60228 limit for 1.5 mm² class 2 is 12.1 Ω/km) |
| Current capacity | Not tabulated for this construction; size the circuit on the declared nominal size once its resistance is confirmed |
| Voltage drop (calculated) | ≈ 32 mV/A/m single-phase at 70°C (1.5 mm² table value: 29) |
| Voltage rating | 450/750 V |
| Insulation | PVC, 70°C conductor rating |
| Standards referred to | IEC 60228 resistance limits, for comparison only; no compliance with a standard is claimed on this page |
Board to ceiling rose to switch, looped in conduit. The size almost every lighting circuit in a Pakistani house is wired in.
Two-way switching, fan regulators and light points, where the load is a few amps and the run is short.
Bought by the coil during first fix. Three strands pull round a conduit bend more easily than a solid conductor of the same size.
The buyer here is a house wireman at first fix, ordering coils by the colour for a 5 or 10 marla build. 3/.029 is the lighting size and it should stay on lighting: socket circuits normally step up to the next code, 7/.029, which the trade sells as 2.5 mm² — see 7/.029 copper cable. For an AC point, a geyser or a stove the jump is bigger again, to 4mm (7/.036) single core copper cable. The honesty on the code cuts both ways: 3/.029 computes to 1.28 mm² and is sold as 1.5 mm², and Pilone labels by the same market convention every other maker uses, which is why both numbers are printed here. If you want a true metric 1.5 mm² conductor, ask for it by the mm² name — 1.5mm single core solid cable.
Worked example — a 5 A lighting circuit 30 m from the board.
Voltage drop is current × length × mV/A/m, divided by 1000. Using about 32 mV/A/m, worked from the calculated 1.28 mm² at a 70°C conductor temperature: 5 × 30 × 32 ÷ 1000 = 4.8 V, which is 2.2% of 220 V — inside the 3% (6.6 V) that BS 7671 Appendix 4 gives for lighting circuits fed from the public supply. At 10 A the same 6.6 V is spent at 6.6 ÷ (10 × 32 ÷ 1000) ≈ 20 m. That is short, and it is the reason long runs on a big plot move up a size even when the load has not changed — check yours with the voltage drop calculator.
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