[54427] in North American Network Operators' Group
Re: DC power versus AC power
daemon@ATHENA.MIT.EDU (David Lesher)
Mon Dec 30 10:44:28 2002
From: David Lesher <wb8foz@nrk.com>
To: nanog@merit.edu (nanog list)
Date: Mon, 30 Dec 2002 10:31:06 -0500 (EST)
In-Reply-To: <004f01c2b018$4ac14900$ae876540@amer.cisco.com> from "Stephen Sprunk" at Dec 30, 2002 09:01:26 AM
Reply-To: wb8foz@nrk.com
Errors-To: owner-nanog-outgoing@merit.edu
Unnamed Administration sources reported that Stephen Sprunk said:
>
>
> > 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?
5ma is correct.
It takes very little current to cause fibrillation.
GFI's compare the current going out the hot lead of a receptacle
with that coming back the neutral. If there is more out than back,
it makes the assumption the rest is going through Jill Winecooler/
Joe Sixpack to ground, and trips.
--
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