← Running quickly in to save someone might be your first impulse, but, if the danger of electric shock remains, you will only injure yourself as well. Take a moment to look out for any danger.
← It is very important that you call for help as quickly as possible. Explain your situation as calmly and clearly as you can when you make the call.
← If you can do so safely, turn off the electrical current. Don’t try to rescue someone near a high-voltage line. Shutting off the current at the power box, the circuit breaker, or the fuse box is the safest option.
← Don’t touch the victim if the electricity hasn’t been shut off. Once you’re sure there is no current, use a rubber or wooden stick, or any other non-conducting tool to move the victim. Cover them with a thermal blanket and wait for the emergency services with them.
Adapted from: https://www.wikihow.com/Treat-a-Victim-of-Electrical-Shock