THE PILOT'S FAILUE TO CONDUCT PROPER PREFLIGHT PREPARATIONS, RESULTING IN A TAKEOFF AT 175 POUNDS OVER MAXIMUM ALLOWABLE GROSS WEIGHT, WITH FULL FLAPS EXTENDED, AND ON THE IMPROPER RUNWAY FOR WIND CONDITIONS WHICH RESULTED IN THE AIRPLANE BEING UNABLE TO CLIMB AFTER LIFTOFF AND SUBSEQUENT COLLISION WITH ELECTRICAL LINES 1,625 FEET BEYOND THE DEPARTURE END OF THE RUNWAY.