15 amp receptacle was being replaced. It has three wires- red, black, and white. Power was not turned off. Attached red wire. Attached black wire- big spark. Main breaker flipped. (60 amp service) as well as double 15amp breaker that the circuit is on. Connected receptacle as was before. Now main breaker still flips when 15 amp circuit is flipped on. What could it be? Change the 15 amp breaker?