You got the wrong picture. You do not need a wrench in your hand to have current to flow through you. All you have to do is just touch the battery terminal. Put one hand on the chassis, and touch the battery positive terminal with the other, and current will flow through you because you are now a complete circuit. But unless you are really hot, sweating like a pig, and sick you would never feel a thing. Even if you were hot, sweaty, and sick it would not produce enough current to hurt you or enough to make you jump. Just a little tingle.
Current is produced by applying a Voltage to Resistance. Current = Voltage / Resistance. You body resistance is fairly high on the order of thousands of Ohm's , and 12 volts is very low voltage. So if the body resistance is say 10,000 ohms then 12 volts / 10000 ohms = .0012 amps. Barely enough to have a sensation or feel it.
A wrench on the other had is extremely low resistance on the order of almost 0 Ohms. Contact resistance is higher then the wrench resistance. Let's say total resistance .02 Ohms. Then 12 volts / .02 Ohms = 600 amps which results in 7200 watts. At 7200 watts your wrench turns into vapor and liquid white hot metal. That you are going to feel and remember the rest of your life. You get burned not electrocuted.
Now if you climb an electric pole and touch a 13,200 volt lines, High current will flow through you and you burst into flames. But you would never feel a thing. That is what happened to these two fine copper thieves.
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Current is produced by applying a Voltage to Resistance. Current = Voltage / Resistance. You body resistance is fairly high on the order of thousands of Ohm's , and 12 volts is very low voltage. So if the body resistance is say 10,000 ohms then 12 volts / 10000 ohms = .0012 amps. Barely enough to have a sensation or feel it.
A wrench on the other had is extremely low resistance on the order of almost 0 Ohms. Contact resistance is higher then the wrench resistance. Let's say total resistance .02 Ohms. Then 12 volts / .02 Ohms = 600 amps which results in 7200 watts. At 7200 watts your wrench turns into vapor and liquid white hot metal. That you are going to feel and remember the rest of your life. You get burned not electrocuted.
Now if you climb an electric pole and touch a 13,200 volt lines, High current will flow through you and you burst into flames. But you would never feel a thing. That is what happened to these two fine copper thieves.
solar3.jpg
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