[132948] in North American Network Operators' Group
RE: Want to move to all 208V for server racks
daemon@ATHENA.MIT.EDU (John van Oppen)
Thu Dec 2 23:04:57 2010
From: John van Oppen <jvanoppen@spectrumnet.us>
To: 'Chris Adams' <cmadams@hiwaay.net>, NANOG list <nanog@nanog.org>
Date: Fri, 3 Dec 2010 04:02:49 +0000
In-Reply-To: <20101203033804.GB5521@hiwaay.net>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
GFCI breakers are very common, the slightly less common version are arc fau=
lt breakers which are starting to show up more as well.
GFCI breakers are often required on large services, most large (new) 480v s=
ervices I have seen (1000A and larger) a have Ground fault breakers, in fac=
t I have seen some bad outages on entire datacenters where the main breaker=
s had a lower ground-fault current setting (for tripping) than a branch cir=
cuit that had a phase-to-ground fault resulting in the main breakers trippi=
ng instead of the branch circuit. I don't know if the ground-fault breake=
rs are required just in Washington (I am in seattle) or if it is a NEC requ=
irement.
John
-----Original Message-----
From: Chris Adams [mailto:cmadams@hiwaay.net]=20
Sent: Thursday, December 02, 2010 7:38 PM
To: NANOG list
Subject: Re: Want to move to all 208V for server racks
Once upon a time, Ricky Beam <jfbeam@gmail.com> said:
> Just because someone is selling them doesn't mean they meet building=20
> codes. (esp. for residential use.) None of the dozen or so licensed=20
> electricians I've ever talked to will use them.
I saw GFCI breakers installed in a new house this year, and it passed inspe=
ction.
I think you experienced a recall of a specific device and are confusing tha=
t with a general removal. When Toyota recalled a model of car, that didn't=
mean all cars were banned.
--
Chris Adams <cmadams@hiwaay.net>
Systems and Network Administrator - HiWAAY Internet Services I don't speak =
for anybody but myself - that's enough trouble.
