ANNEALED TINNED COPPER
Copper wire is coated with tin in order to keep its conductive characteristics while becoming much more resistant to corrosion by protecting it from the elements. It also provides much more strength and durability to the wire. Tinned copper wire can last up to 10 times longer than untinned wire. Because of its superior corrosion resistance and greater strength, tinned wire is preferable wherever the wire is exposed to water and other corrosive elements. It is used in overhead wire applications for subways, light and heavy transit, mine trains, buses, industrial cranes and marine projects, among others. It is also easier to solder, so it allows for stronger connections.