Customization should be checked before price. Ask for conductor material, insulation type, shielding structure, voltage rating, jacket color, and test standards. A serious supplier can provide drawings, samples, and a complete bill of materials. IEC 60502-1 remains a useful reference for extruded-insulation power cables. Small details matter. A tighter bending radius may require different shielding and jacket compounds.

Pricing needs more than a unit figure. Copper content, raw-material formulas, testing, packaging, tooling, and export documentation can change the final cost. The World Bank’s Commodity Markets Outlook has repeatedly shown meaningful copper-price fluctuations, so request a quotation validity period and a transparent adjustment formula. Otherwise, the cheapest offer may become expensive later. I would also compare prices at the same specification level, not by meter alone.

Lead times and minimum order quantities often expose practical weaknesses. The International Energy Agency’s Electricity 2024 report forecasts global electricity demand to grow by about 3.4% annually through 2026. Demand pressure can affect production schedules. Ask whether materials are stocked or purchased after confirmation. Request separate timelines for sample approval, first production, and repeat orders. A flexible supplier may accept a lower trial quantity, but the price could rise. That trade-off deserves calculation. In my view, written answers are safer than optimistic promises, although even a written schedule can fail when specifications keep changing.