Rescue the kid from park

A teacher was given in-charge to take care of the students. The teacher took care with full responsibility. In spite of that, a kid went inside a park, which is under construction. Since it is Sunday, no men are working inside. As there is a forest at backside of the park, it was electrically fenced. So, the teacher informed the guard. The guard is none other than you. The guard is none other than you. Now, you need to switch off the electrical circuit and then you need to search and rescue the kid.