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Strip one metre of conductor and weigh it. 2.5 mm² should read 22.2 g, 4 mm² should read 35.6 g.
Copper weighs about 8.89 kg per km for every mm² of cross-section, and that number does not care whose name is on the drum. So the one claim a buyer can settle without a laboratory is the one that matters most: whether the coil holds the cross-section it is sold as. We publish our own figures below so the same scale can be turned on us. What we will not do is publish measurements of Golden Cables' product, because we have not measured it.
The arithmetic behind the table is one line. A 10 mm² conductor masses 88.9 kg per km, so 88.9 ÷ 10 = 8.89 kg per km for every mm². Multiply that by the nominal size and you have the mass of any copper conductor, per kilometre or, dividing by a thousand, per metre in grams.
| Size | Class 2 strands | Copper per metre | Copper per 100 m |
|---|---|---|---|
| 1.5 mm² | 7/0.53 | 13.3 g | 1.33 kg |
| 2.5 mm² | 7/0.67 | 22.2 g | 2.22 kg |
| 4 mm² | 7/0.85 | 35.6 g | 3.56 kg |
| 6 mm² | 7/1.04 | 53.3 g | 5.33 kg |
| 10 mm² | 7/1.35 | 88.9 g | 8.89 kg |
| 16 mm² | 7/1.70 | 142.2 g | 14.22 kg |
Take a 100 m coil of 2.5 mm² two-core. The copper in it is 2 × 2.22 = 4.44 kg. The coil on the scale will read more than that, because PVC insulation, the outer sheath and the drum all have mass, and insulation thickness is not identical between makers. So a whole-coil weight only compares two coils of the same size, cores and construction — it is a screening test, not a verdict.
The decisive version takes five minutes. Cut exactly one metre, strip the insulation off a single conductor, and weigh the bare copper. 2.5 mm² reads 22.2 g, 4 mm² reads 35.6 g, 6 mm² reads 53.3 g. Measure the metre against a steel tape, not by eye, because a 5% error in length is a 5% error in the answer. If the reading is well under the figure, the conductor is not the cross-section on the label — and that is a fact about the coil in your hand, which is the only thing either of us can honestly argue about.
Two limits, stated plainly. The test checks cross-section, not what the metal is: a copper-clad aluminium conductor would come in far lighter, and how to tell the metals apart is on checking the conductor, not the label. And aluminium cable is a different metal at a different density, so none of these figures apply to it — see copper vs aluminium cable.
Once the copper in the coil is settled, the price follows it. Cable is priced off the day's copper rate, which is why we quote on WhatsApp instead of printing a figure that goes stale by the week. Pilone draws its own cable in Lahore and sells at the factory rate, with roots in the copper trade going back to 1992 and the cable line running since about 2020. Punjab is 1–2 days, the rest of Pakistan 2–4. The full supplier checklist — the questions to put to us as well as to anyone else — is on how to choose a cable company in Pakistan.
Send the cores, size and metres you need for today's factory rate from Lahore — then put a metre of it on the scale.