As you can see in this photo, lack of maintenance over the years has caused this expensive repair. About 7000.00 worth. Generally mechanical lugs should be torqued per specs annually and if this is not done deterioration is the result. Failure could come at time when you count on your power the most, and emergency repairs could take much longer if on a weekend or at nights. Giffen Electric can visually inspect, use thermal heat detection device and re-torque to the recommended manufacture specification at a fraction of the cost.