Copper-clad steel (CCS) stranded conductor is a bimetallic composite wire consisting of a high-strength steel core metallurgically bonded with a continuous copper outer layer. Multiple CCS single wires are concentrically stranded to form a flexible, durable conductor engineered for grounding, earthing, and power transmission applications.
A typical 7-strand CCS conductor features one central wire surrounded by six outer wires in a hexagonal arrangement. The copper cladding (6%~10% of wire diameter per ASTM B227) provides conductivity and corrosion protection, while the steel core delivers mechanical strength — up to 2–3 times that of pure copper.
|
Parameter |
Grade 30 HS/EHS |
Grade 40 HS/EHS |
|
Conductivity |
30% IACS |
40% IACS |
|
Cu Thickness |
≥ 6% of dia. |
≥ 10% of dia. |
|
Density |
8.15 g/cm³ |
8.24 g/cm³ |
|
Stranding |
7-wire (1+6) / 19-wire |
7-wire (1+6) / 19-wire |
· Power substation and transmission tower grounding grids
· Telecommunication tower and data center earthing systems
· Railway and transit signal bonding and lightning protection
· Renewable energy (solar/wind farm) grounding networks
· Industrial plant equipment grounding and static dissipation


Copper Clad Steel technical support and services include: