Re: Safety FAQ is here -- draft, asking for comments.
Regarding this post...
> Was the oddest thing. As I was reading the note- TV Olympics anouncer
> started talking about guy on crew team almost electrocuted with 30kV.
> Anyway, my understanding about electrocution potential of AC vs.
> frequency is that just as the human ear cannot hear much beyond 18khz,
> neither can the body respond in much of any other way than sensing
> heat dissipated at those frequencies. Reason for both insensitivities
> is supposed to be inherent slowness of nerves beyond these freqencies.
> I've demonstrated this pretty well with flyback transformer and short
> pulse at a variable rep rate. When I've adjusted pot beyond where my
> ear could hear mechanical vibration frequency, have only gotten skin
> burns. Below that shock seems to get worse, although I'm not sure if
> its inversely linear with frequency.
What you are describing is a classic example of the SKIN effect at
work :) NOT to be confused with voltage. 10:1 the 30kV was at 60Hz.
As frequency rises, current penetration becomes less (inversely
proportional to square root of the frequency). I don't think nervous
responses play any part in this.