On Wed, 8 Dec 2010 09:42:04 -0800 (PST), jgharston wrote:

My last real shock was when somebody decided to phone me just as I was
holding the spade terminals under the connector screws. 50V 20mA is
enough to hurt.

Ringing is a little more than that, 80v AC 25Hz.

The 50v DC on a line can make you jump if you forget the block you
are connecting the CNR or music lines to also has a DEL and it's
peeing with rain...

--
Cheers
Dave.