Somewhat relevant to this discussion:

>From the Australian Standards (with some editing):
*

APPLIED PART
*

A part of the EQUIPMENT which in NORMAL USE:

=97 necessarily comes into physical contact with the PATIENT for the EQUIPM=
ENT
to perform its function; or

=97 can be brought into contact with the PATIENT; or

=97 needs to be touched by the PATIENT.

*PATIENT LEAKAGE CURRENT*

Current flowing from the APPLIED PART via the PATIENT to earth or flowing
from the PATIENT to earth originating from the unintended appearance
of a voltage
from an external source on the PATIENT.

*ALLOWABLE VALUES OF PATIENT LEAKAGE CURRENT*

=97 DC: 0.01mA (normal conditions), 0.05 mA (fault conditions)

=97 AC: 0.1 mA (normal conditions), 0.5 mA (fault Conditions)

*Transient currents occurring during the first 50 ms following a fault shall
be **disregarded.*


2009/7/6 Ruben J=F6nsson <ruben@pp.sbbs.se>

>
> > >
> > > Ohm's law works very well for most metals. It is not a very good model
> > > for the human body. Sweat and grip pressure greatly change the amount
> > > of current which will flow for a given voltage. I also greatly suspect
> > > that, as the voltage climbs, there is a nonlinear increase in the
> > > amount of current due to electrochemical breakdown of the skin. Also,
> > > all bets are off once the skin is punctured because the internal body
> > > fluids are MUCH more conductive.
> > >
> > > Sean
> >
> > But it would still technically follow ohm's law since the resistance
> > of your body would change?
>
> All currents flowing in a circuit follow ohm's law.
>
> However, as soon as the current is not a DC current and/or the load is not
> a
> pure resistive value or changes with voltage, time, temperature or whatev=
er
> it
> becomes a bit more complex. To complicate matters even more, the load can
> have
> inductive or capacitive components which makes the current, voltage and
> resistance (or rather resitance + reactance) to change when the frequency
> is
> changed. The current actually also becomes out of phase with the voltage.
>
> /Ruben
>
>
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D
> Ruben J=F6nsson
> AB Liros Electronic
> Box 9124, 200 39 Malm=F6, Sweden
> TEL INT +46 40142078
> FAX INT +46 40947388
> ruben@pp.sbbs.se
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D
>
> --
> http://www.piclist.com PIC/SX FAQ & list archive
> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist
>
-- =

http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist