## Common ground
All options refer to stranded wire ropes cables made from different metals.
## Options at a glance
**7312.10 – Iron or steel**
- **Defining trait:** Made from iron or steel, offering high tensile strength and durability.
- **Typical examples:** Crane cables, elevator cables, mining hoists.
- **Best fit when:** High strength and load-bearing capacity are required.
**7413.00 – Copper**
- **Defining trait:** Made from copper, primarily used for electrical conductivity rather than mechanical strength.
- **Typical examples:** Electrical grounding cables, power transmission cables (in specialized applications).
- **Best fit when:** Conductivity is the main purpose, not structural support.
**7614 – Aluminium**
- **Defining trait:** Made from aluminium, lighter than steel but less strong; used where weight matters.
- **Typical examples:** Overhead power lines, marine mooring cables, aerial lifts.
- **Best fit when:** Weight reduction is critical and moderate strength suffices.
## Key differences
| Feature | 7312.10 (Steel) | 7413.00 (Copper) | 7614 (Aluminium) |
|------------------|-----------------|------------------|------------------|
| Primary use | Mechanical strength | Electrical conduction | Lightweight structure |
| Density | High | Very high | Low |
| Tensile strength | Very high | Moderate | Medium |
## How to choose
- Is the cable used for lifting, hoisting, or heavy load support? → 7312.10
- Does it carry electrical current as its main function? → 7413.00
- Is weight reduction more important than strength? → 7614
## Overlaps & pitfalls
A cable may combine conductivity and strength (e.g., copper-clad steel), but the primary function determines classification. If the product is mainly for mechanical use, even if conductive, it belongs in 7312.10. The main function must be prioritized—no rule is given, so users should choose based on the cable’s **primary purpose**