. >> reporter: all the above ground wires from candlestick to the pg&e substation in daly city are brand-new. the wire is thicker, too, so it can carry more electricity and it is covered with a special plastic coating. >> mylar balloon comes into contact with that if a tree branch comes into contact with it or animal comes into contact, it's not going to result in an electrical outage. so, in other words, it's insulated, higher capacity, carrying more electricity, more reliably serving candlestick. we'll be ready for this game on saturday. >> reporter: work crews are also cutting trees around the power lines in the area and urging neighbors to trim their trees, as well. they are trying to spree end a repeat of what the mayor called a national embarrass -- they are trying to prevent a repeat of what the mayor called a national embarrassment, the lights went out twice on monday night football causing a significant game delay and putting the 49ers as well as the fans in the dark. officials say they believe the piece of equipment failed between this pole and the stadium and that caused candlesti