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Solid misinformation!
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Posted by Bill Homer [Email] (#3427) [Profile/Gallery] (more from Bill Homer) on Thu, 19 Jul 2012 18:50:04 Share Post by Email
In Reply to: DC setting on multi-meter is only one you want to use, TomR 97CSE, Thu, 19 Jul 2012 17:21:29
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1. The only useful measurement for finding an unknown current drain in your car's electrical system is to measure current; one does this by setting a multimeter to one of the DC current settings (most household meters do not have AC current measurement) and placing this device between the battery and the rest of the car's electrical system. The only useful DC Voltage setting for this investigation is if you measure the voltage drop over a resistor of known value and calculate current by applying I = V/R (derived from V = IR) - this is actually what many meters do to calculate current.

2. A 12 V car battery does not possess the electrical potential (voltage) to overcome the high resistance of the human body (typically 2000 to 50,000 Ohms, and usually to the higher side of that range unless you are very wet, cut open and have metal probes stuck in you, i.e. during surgery) and pass any significant amount of current. So, again using I = V/R, plug in 12V/50,000 Ohms = 0.00024 Amps or 0.24 milliAmps. One needs about 30 milliAmps (0.03 Amps) across the human heart to stop it - much easier with higher voltages.

Don't believe me? See the link or Google "electrocution with car battery" for 115,000 results.

posted by 108.71.134...

http://www.dansdata.com/gz013.htm

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