>=20
> 30 volts is certainly enough to feel unpleasant, especially if your skin =
is
> in reasonable condition (i.e. not dried out).  With wet hands many people
> can feel a 9v battery through their skin.
>=20
> However, it won't be anything like the kind of shock you would get from h=
igh
> voltages, and is not usually enough to be dangerous in skin contact
> situations.  Electrical safety regulations set a threshold of 50v were
> insulation requirements etc. become much stricter.
>=20
> Mike
>=20

The safety term to look for is "accessible parts". The maximum voltage for =
this
varies with location (dry or wet) and AC or DC voltage.

>From IEC/EN61010-1

Limits are 33Vrms, 46.7V peak or 70V DC for dry areas and 16Vrms, 22.6V pea=
k or
35V DC for wet locations.

Higher voltages can be accessible if maximum current are less than certain
values measured with a specific circuit (test circuit that represents the
impedance of the human body).

We manufacture a high voltage power supply (around 20kV) thas is still an
accessible parte since the current is so low.

You also need to look at stored energy.

/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=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
www.liros.se
Tel +46 40142078
=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=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

--=20
http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.