I got shocked a few times with 120v. I also got a 5 second continuous shock with this ignition; https://www.summitracing.com/parts/msd-4223. My finger was very warm for about half an hour and I was feeling as if I was gonna need to sit and rest a while. I couldn't pull my finger off, I had to move away with my body to disconnect from it. It even burnt some of my fingerprint away. I still have 3 small white dots where it got me. Never be careless again!!!