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One 1.5 mm² class 5 core, 30 strands of 0.25 mm, PVC insulated and rated 1000 V DC. 19.5 A, 13.3 Ω/km, 29 mV/A/m across the go-and-return pair. This is the workhorse small size on a home solar job: panel-to-charge-controller runs on a one or two panel array, the wiring inside a DC board, and 12 V and 24 V circuits that carry real current over a short distance. About 1.33 kg of copper in 100 m. 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.
1.5mm DC wire is quoted at the day's copper rate, per metre.
1.5 mm² single-core DC cable is quoted at the day's copper rate, per metre — send the metres and your city on WhatsApp and today's number comes back. It is a 1000 V DC-rated single core on class 5 flexible copper, 30 strands of 0.25 mm, and the published 19.5 A is a reference figure rather than a working one. On solar work this size is chosen by voltage drop, not by current: at 29 mV/A/m it suits short panel runs, DC board links and small 12 V or 24 V load circuits, and almost nothing longer.
Solar DC cable gets quoted per metre, per foot and per coil like everything else, and the unit is often left unsaid. Per foot always reads cheapest because a foot is under a third of a metre. A coil price means nothing without the coil's length. Convert to a rate per metre before comparing, and remember you are buying two legs: a DC circuit needs positive and negative, so the metres you need are roughly twice the one-way route.
| Quoted as | Length in metres | To get the per-metre rate |
|---|---|---|
| Per metre | 1 m | Nothing to do |
| Per foot | 0.305 m | Multiply the per-foot rate by 3.281 |
| Per yard | 0.914 m | Multiply the per-yard rate by 1.094 |
| Per 90 m coil | 90 m (295 ft) | Divide the coil price by 90 |
| Per 45 m half coil | 45 m (148 ft) | Divide by 45 |
| Per 100 m drum | 100 m (328 ft) | Divide by 100 |
Coil lengths are not standardised in Pakistan, so get the metre count written down before you pay. We quote per metre against the length you give us. The price per meter page covers every conversion, and the solar cable price list carries the rest of the DC range.
The useful question on a DC circuit is not how many amps the cable will take but how far it will reach before the volt drop eats the array's output. The column below works that out at a representative 8 A string on a 100 V array, where the 3% that solar work designs to is a 3.0 V budget. Volt drop is current × route metres × mV/A/m ÷ 1000, and the tabulated mV/A/m already counts both the positive and the negative leg, so the route length is one-way.
| Size | Strands (class 5) | Current (reference) | Voltage drop | Route at 8 A, 3% of 100 V | Copper in a 90 m coil |
|---|---|---|---|---|---|
| 0.75 mm² | 24/0.20 | 6 A | 62 mV/A/m | 6 m | 0.6 kg |
| 1 mm² | 32/0.20 | 10 A | 44 mV/A/m | 9 m | 0.8 kg |
| 1.5 mm² | 30/0.25 | 19.5 A | 29 mV/A/m | 13 m | 1.2 kg |
| 2.5 mm² | 50/0.25 | 27 A | 18 mV/A/m | 21 m | 2.0 kg |
| 4 mm² | 56/0.30 | 36 A | 11 mV/A/m | 34 m | 3.2 kg |
| 6 mm² | 84/0.30 | 46 A | 7.3 mV/A/m | 51 m | 4.8 kg |
Read down that route column and the pattern is the whole of DC cable sizing: every step up in size roughly doubles the distance you can cover for the same loss. It also shows why battery-side runs jump so far up the range. A 24 V battery circuit has a 3% budget of only 0.72 V, about a seventh of the budget on a 100 V array, so the same current reaches roughly a seventh as far — which is how a 6 A run that is fine on the roof becomes badly undersized between the controller and the batteries.
One more limit belongs on the record: the sheath on this cable is PVC with a 70°C conductor rating, and the reference current assumes 30°C ambient. A Lahore rooftop in June is nowhere near 30°C, so the figure derates before you have connected anything. Size from your panel's rating plate, add the ambient correction, and have your solar installer or a licensed electrician confirm it. The cable size calculator is a starting point, not the answer.
| Property | Value |
|---|---|
| Conductor | Plain annealed copper, class 5 flexible stranded |
| Nominal area | 1.5 mm² × 1 core |
| Strand construction | 30 / 0.25 mm (typical) |
| Max conductor resistance at 20°C | 13.3 Ω/km |
| Current capacity (single conductor, DC reference) | 19.5 A |
| Voltage drop | 29 mV/A/m |
| Voltage rating | 1000 V DC |
| Insulation / sheath | PVC / PVC, 70°C conductor rating |
| Conductor copper weight | ≈ 13.3 kg/km |
| Reference standards | IEC 60228 (conductors), IEC 60227 (PVC cables) |
Panel-to-charge-controller wiring on a one or two panel system, where string current stays in single figures and the roof-to-board distance is short.
Links between breakers, fuses, isolators and terminals inside a DC combiner or board, where runs are measured in centimetres.
Lighting, fans and DC sockets fed from a battery bank — sized on volt drop, not on the 19.5 A.
Volt drop is current × route metres × 29 mV/A/m ÷ 1000, and the 29 already counts the positive and the negative leg, so use the one-way route length. Solar work is designed to 3% on the DC side. A 6 A string on a 100 V array has a 3.0 V budget: 3.0 × 1000 ÷ (6 × 29) = 17 m of route — a real roof-to-board distance, which is why this size works on small arrays. Take the same 6 A down to a 24 V battery circuit and 3% is 0.72 V, worth 4.1 m. Take it to a 20 m controller-to-battery run and the drop is 6 × 20 × 29 ÷ 1000 = 3.5 V, which on 24 V is 14.5% — nowhere near acceptable. Battery and inverter runs are why installers jump to 6mm DC cable and larger, even where the amps look small.
DC cable is bought in small quantities and a short coil is easy to miss, because the whole thing weighs less than a bag of cement. Three checks settle it.
Conductor mass = area × cores × 8.89 kg/km per mm². For 1.5 mm² single core that is 1.5 × 1 × 8.89 = 13.3 kg/km, so a 90 m coil holds only about 1.2 kg of copper before insulation and sheath.
A class 5 core at this size is about 30 strands of 0.25 mm. Cut the end square and count under good light. Check the print on the sheath too: a DC cable should carry a 1000 V DC rating, and 450/750 V building wire is not a substitute on a solar string.
Get the metre count in writing before you pay, then check it with a measuring wheel. A short coil is the quietest way a per-coil price stops being the price you calculated.
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