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     Human electrical resistance


       Summary: Learn how much current it takes to stop the human heart, and more.

  

The electrical resistance of the human body depends on the condition of your skin at the time of measurement. If your skin is wet, you could have a resistance of only about 1100 Ohms. With dry skin, the amount is much higher at around 495,000 Ohms.

 

The electrical resistance of your internal body is much smaller at about 85 Ohms up to 575 Ohms.

 

             
 

Now let's talk about how this applies to getting zapped by electricity.

When working with any kind of electricity, you need to make sure you are staying dry. This means if you are going to be working in a hot place where you will sweat, then take a towel with you, or  take frequent breaks and dry off. If you get shocked while wet, you are much more likely to feel the jolt, and in some cases this can be the difference between life and death. Now let's discuss the reason that getting shocked could lead to death. Whenever you hear on the news or internet, "Oh wow, he just got shocked by 50,000 volts", you are thinking, how in the world is he still alive? Well here is the answer to this time aged question.

The amount of voltage is not the issue in most cases, it's the amount of current (amperage) introduced into the human body that can kill. It only takes about .015 amps across the heart to kill a person. That's it, .015 amps! So the bottom line is no matter how little the voltage might be, always disconnect power at the breaker, and then check with a meter at the wall outlet, switch, whatever you are working on, to make sure power is really off. Have fun, BE SAFE, and always respect electricity.  

                                         

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