The tin coating offers excellent protection against the elements, making it more resistant to corrosion than bare copper wire. The tin coating also extends the life span of the wire, making the need for repairs less frequent.

Tinned copper wire is very useful for grounding due to its ability to resist corrosion in outdoor and wet environments. However, it is slightly less conductive than bare copper wire, so it's a good idea to weigh up which features are more important for your project, corrosion resistance or conductivity.