Contact Amp: Fill & Download for Free

Well, let's see:Nothing happens. I’m still alive and posting on Quora.Why? Let’s measure the current. (My right finger is on the negative meter probe, and the meter is set to the 2 mA range)0.026 mA; that's 26 micro amps, that’s 12V × 26µA = 312 micro watts of power being dissipated in my body (as heat).Nothing is going to get burned with 312 micro watts.You may wonder why a battery capable of providing 1000 amps, only provides 26 micro amps. Because of resistance, as others have said. Skin resistance is very high, and current is voltage divided by resistance.Now, if I drop a wrench (with essentially 0 ohms of resistance, Yes I know it’s not really 0 ohms, but close enough for our purposes) across the battery, the current would be 12(volts) divided by 0(ohms), or infinite current. Of course, that’s not possible, but the battery will provide everything it can. This will probably be about 1000 amps. So 12(volts) times 1000(amps) is 12,000 watts. That’s a lot of power, and will easily melt parts of the wrench. A metal watch band or ring can get hot enough to melt, and seriously burn you if the battery somehow contacts it in two places.So, your answer is nothing will happen because your skin resistance is way too high to conduct any significant current at 12 volts.For the adventurous out there put a 9 volt battery on your finger and you will feel nothing. Put the same battery on your tongue and it will hurt A LOT. (Don’t say I didn’t warn you). That is because a wet tongue has much lower resistance than skin.Edited:Wow, almost 1000 upvotes. Thank you.I am adding a picture of what can happen to a wrench.

Those specifications are usually available on the spindle manufacturer’s website for the specific spindle you have. If you purchased a fully built machine, the machine manufacturer should also have that information. Lastly, on the ones I’ve seen, those specs are often on a label located somewhere on the spindle, itself. If the spindle is already mounted, that label is probably obscured. If you want to try to measure the amperage yourself, I’d suggest using a clamp-type non-contact amp meter clamped over the spindle power cable where it connects to the spindle. When measuring, make sure you are taking the measurements while the spindle is working hard, like cutting hardwood or aluminum. The current draw under load is far higher than the free spinning current draw.

I've answered this kind of question before. They dont train for this (Tacrics, Techniques and Procedures). It adds unnecessary risk too. Contact amps everyone up, high level thinking goes away and is mostly replaced with muscle memory. The last thing you want to do is add complication into the picture. Imagine if you will, someone grabs the blue TRAINING grenade by accident, when they should have grabbed the green one in another pouch. Yeah, you just alerted your target. There is no benefit to this. At all. There are flash bangs that are useful in certain circumstances, but those wont be used by line soldiers.