[54428] in North American Network Operators' Group
Re: DC power versus AC power
daemon@ATHENA.MIT.EDU (Steven M. Bellovin)
Mon Dec 30 10:48:07 2002
From: "Steven M. Bellovin" <smb@research.att.com>
To: "Stephen Sprunk" <ssprunk@cisco.com>
Cc: "joe mcguckin" <joe@via.net>,
"North American Noise and Off-topic Gripes" <nanog@merit.edu>
Date: Mon, 30 Dec 2002 10:46:45 -0500
Errors-To: owner-nanog-outgoing@merit.edu
In message <004f01c2b018$4ac14900$ae876540@amer.cisco.com>, "Stephen Sprunk" wr
ites:
>
>Thus spake joe mcguckin <joe@via.net>:
>> It only takes 30ma to put your heart into atrial fibrillation. In the
>> usa, gfi's are set to trip at 5ma.
>
>Did you mean 5A, or am I misunderstanding GFIs?
>
No -- 5 ma is correct. (GFIs measure the difference in current between
the hot and neutral leads -- if it exceeds 5 ma, it trips.)
--Steve Bellovin, http://www.research.att.com/~smb (me)
http://www.wilyhacker.com (2nd edition of "Firewalls" book)
