By amperage of the socket, I assume you're referring to the breaker that protects it. That usually wouldn't even come into play as the resistance of your skin will draw a low enough amperage that you'd get a shock without tripping the breaker. I've been shocked by 120 plenty of times. Older electricians used to wet their index and middle fingers and touch them across the leads to see if they were alive before working on them (that was b4 capacitive pen testers).