1. Introduction
In both engineering procurement and residential wiring projects, buyers often notice significant price gaps between different cable manufacturers—sometimes 10% to 20% or more—for cables that appear to have the same model and specifications. This discrepancy is rarely due to branding alone; rather, it reflects fundamental differences in raw materials, manufacturing processes, quality control, and compliance with national standards.
This guide will help you make informed purchasing decisions by breaking down cable cost structures, highlighting key differences between genuine and substandard products, and offering practical verification tips.
2. Cable Cost Structure Overview
|
Component |
Approx. Share of Total Cost |
Impact on Performance |
|---|---|---|
|
Copper Conductor |
~70% |
Determines conductivity, heat resistance, and service life |
|
Insulation / Sheath Materials |
~20% |
Affects flame retardancy, mechanical protection, and durability |
|
Manufacturing & QC Overheads |
~10% |
Ensures dimensional accuracy, compliance, and safety testing |
3. Raw Material Differences: Oxygen-Free Copper vs. Ordinary Copper
High-quality cables:
-
Use oxygen-free copper (OFC) with conductivity ≥ 100% IACS (International Annealed Copper Standard).
-
Offer stable electrical performance, low resistance, reduced energy loss, and minimal heating.
Low-cost alternatives:
-
Often use recycled copper or mixed-grade copper with conductivity between 85–92% IACS.
-
Result in higher resistance, greater heat generation, faster insulation aging, and increased fire risk.
