Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
Hero999 said:It also depends on the whether the current is DC or AC and frequency also has an effect, 50Hz is more deadly than DC but 50kHz AC is safer than DC.WHAT DO I KNOWi am novice right.
Also not that the resistance of your skin generally drops at higher voltages, so you may measure your resistance a 1M with a multimeter and think you'll be alright if you're connected to 500V DC as only 0.5mA will flow though you but you're wrong your resistance is likely to drop to <5k so >100mA will flow which is deadly.
raybo said:Hero999 You got that wrong DC is more up to chook you pretty good. Actualy AC is safer because at some time there is no voltage and no current flow. If you are lucky you could disconnect during that time. DC on the other end it will hold on to you and pass current internaly.
raybo said:DON I am glad that your research only mention current. Voltage is consequencial. I can cook humburgers with the microwave with not nearly 10 amps. And in the hospitals the revive shock machine the meter reads 100ma max 20ma is nominal and last for seconds 10amps we have lunch.
dknguyen said:I don't think this part is right. Edison discovered that it takes a lower AC voltage to electrocute you than a DC voltage. Also, according to Wikipedia (questionable) it claims the minimum current where you can no longer let go of the line as 15mA for AC, and 45mA for DC. Wouldn't that make low frequency AC (where the skin effect doesn't come in) much more dangerous than an equivelant DC line since it could shock you more easily and hold you onto the line more easily? It seems (if the Wiki claim is accurate) that AC is will hold you onto the line more easily than DC. It also seems that AC having no voltage and no current flow at some times has no effect on making it easier to let go of AC...in fact it would seem to make it harder to let go.
https://en.wikipedia.org/wiki/Electric_shock
It would seem that an AC line will pull you in more easily because it takes less current than DC to do so, but it's harder to let go of an DC line than AC because it contracts your muscles in one direction only, and causes no convulsions. AC- easier to get stuck on but easier to pull away. DC- harder to get stuck on, but once you are stuck it's harder to pull away. A strange kind of balance between dangerousness.
Hero999 said:What are you talking about? 100mA would kill you for sure!
Most batteries can supply more than 100mA but thier voltage is to low to overcome your body's resistance an allow a lethal current to flow, but the 120V AC is a high enough voltage to allow a deadly current to flow.