The answer is more obvious if you use slightly different terminology to ask it. You could re-phrase the question as: Why are the low-voltage wires in a building earthed , but high-voltage...
Low - Flo Rida featuring T-pain.
[Chorus:] Shawty had them Apple Bottom Jeans [Jeans] Boots with the fur [With the fur] The whole club was lookin at her She hit the flo [She hit the flo] Next thing...