How does anyone get shocked by only 12 volts?
Thanks,
Rob
Beats me. I would assume you’d feel it if you had breaks in the skin. Or maybe if you were *extremely *sweaty. Other than that, not sure.
Generally speaking, anything above 50 V is considered an electrocution risk. The higher the voltage (across your body), obviously, the more danger there is.
If the lights flicker you are never going to know it.
Sure sure. I’m not saying everybody is wrong, I’m just saying I don’t believe it. To me, ‘feeling’ as a sense has less temporal resolution than sight.
Maybe not, though. What kind of frequency do vibrators and other massagers operate at? Because you can definitely feel those. I think 20 frames/second is enough to fool our eyes into seeing continuous motion.
I don’t know. I can’t take everyone’s word for it and I’m not going to go experiment on myself. So I guess what I’m saying is… cite?
You seem to me like exactly the kind of person who’d know the difference.
Awesome, thanks.
I assume this means something.
I can hear a 60 cycle hum, see a 60 Hz flicker on a CRT and am annoyed by cheap fluorescent lights. Incandescent lights don’t flicker noticeably, but that’s not because the human body can’t perceive a 60 Hz phenomenon.
Nope, they were AC. Alinco magnet stationary field, wound armature with sliding contacts (not really slip rings) and no commutator. Phones have been rung with AC pretty much since they have had ringers.
D’oh. You’re right, of course.
Yes. It means an electrical engineer who has gotten many AC shocks and recently a DC shock really doesn’t need to ask this question.
If this was directed at me, I was very sweaty and it was my forehead that touched the battery terminal. The terminal might also have had vaseline on it.
I was removing the metal bumper mount on my car, and was probably grounded reasonably well.
This is highly unlikely, human sensitivity of hearing drops off below 100Hz quite dramatically. You can hear such frequencies directly but the sound levels have to be very high indeed.
What you highly likely can hear is the first harmonic, 120Hz which is well inside your hearing range, you may also hear other harmonics which when reacting with each other can produce sounds lower than your 120Hz.
The 60Hz flicker is usually only visible due to the strobing effects against other devices which operate slightly out of phase but at or very near the same frequency. On very badly depleted phosphors and fluorescant materials where persistance is extremely short then you might just see some flicker, but such low persistant materials have largely been relegated to history.
Mostly these irritations are something our brains recognise as a pattern in comparison to something else rather than in their own right.
Worst shock I ever had was only 50V, but I was stripping back telephone cable, with my teeth, up a crane 50 feet up and I dared not let go of anything, very interesting experience.
I’ve had much higher voltage shocks, which comes from working with valves, tvs and stuff like that, but that 50V was still the worst.
I though it was 49 volts. No big difference.
It’s 48 V nominal, actually. But, the actual voltage can range around that value by several percent.
Actually, most of what people call “60-cycle hum” is in fact 120 Hz hum. The hum is generally caused by either magnetostriction in transformer or inductor cores or by magnetic repulsion/attraction in adjacent conductors. Both of these effects complete two full cycles for every one electrical cycle.