Have always wondered this.
Why can I touch a 7VDC 140A system with no problems, but 120V with less than a mA can kill?
In: Physics
You have pretty high resistance.
The 7V system might have the “capacity” to provide 140A, but it can’t run that much through you. You’re probably 1M ohms, so only .007 ma will run through you.
To get 140A, you need a pretty fat wire that has only 0.05 ohms of resistance.
Latest Answers