What is the purpose of a safety wire through a turnbuckle used to tension guy lines?
Secure the guy line if the turnbuckle breaks
Prevent loosening of the turnbuckle from vibration✓Bonne réponse
Provide a ground path for lightning strikes
Provide an ability to measure for proper tensioning
Explication
Wind and vibration can slowly unscrew a turnbuckle and let a guy line go slack, which changes the tension pattern that keeps the tower standing. A safety wire threaded through the turnbuckle body and frame locks it so it cannot turn.