Buyers must prioritize conductor material, typically Oxygen-Free Copper (OFC) for high conductivity or Aluminum/CCA for cost-sensitive projects. Ensure the insulation material (e.g., PVC, XLPE, or LSZH) matches the environment; for instance, XLPE is superior for high-voltage heat resistance, while LSZH (Low Smoke Zero Halogen) is mandatory for public safety in confined spaces. Always verify the American Wire Gauge (AWG) or mm² cross-sectional area to ensure it meets the required current-carrying capacity to prevent overheating.