Seth Mattinen wrote:
I have a pure curiosity question for the NANOG crowd here. If you run
your facility/datacenter/cage/rack on 120 volts, why?
I've been running my facility at 208 for years because I can get away
with lower amperage circuits. I'm curious about the reasons for using
high-amp
Oliver Hookins wrote:
Hi all, hopefully this isn't too off topic (since it's datacentre related).
We have an APC AP7952 rack PDU which has stopped working. I believe the
management module is faulty, and it is about 5 years old. APC don't service
these outside of warranty at all so I'm
- Original Message -
From: Oliver Hookins oliver.hook...@anchor.com.au
To: nanog@nanog.org
Sent: Wednesday, May 27, 2009 12:47 AM
Subject: Out of warranty APC PDU repair
Hi all, hopefully this isn't too off topic (since it's datacentre
related).
We have an APC AP7952 rack PDU which
On Wed May 27, 2009 at 03:17:24 -0400, Barton F Bruce wrote:
*This message was transferred with a trial version of CommuniGate(r) Pro*
- Original Message - From: Oliver Hookins
oliver.hook...@anchor.com.au
To: nanog@nanog.org
Sent: Wednesday, May 27, 2009 12:47 AM
Subject: Out of
On 2009/05/26 10:46 PM Aaron Wendel wrote:
Last time I looked at my bill I was being billed by the kWh
P=V*I
As a Holder of two different FCC licenses I can tell you voltage is not
what kills, it is amps and location that kill. Actually in certain cases
as long at you have good electrical isolation, high enough dielectric
breakdown voltage, and good grounding higher voltages can be safer and
more
The early problems with distance transmission of DC really didn't have
anything to do with the inherent properties of DC current, but with
the fact that, at the time, there was no good way to convert DC
voltages up and down in a similar fashion to the function performed by
transformers with AC.
Mark,
A EDNS referral from the root servers to the COM servers
already exceeded 512 bytes. The world hasn't fallen over.
Actually, I was thinking to myself yesterday that the email world is going to
be awfully
fun when IPv6 sets in and we're all running mail servers with nice long
fc00:836b:4917::a180:4179
And yes, before anyone points out, I just realised I posted an abbreviated
example. :)
Brian Raaen wrote:
As a Holder of two different FCC licenses I can tell you voltage is not
what kills, it is amps and location that kill. Actually in certain cases
as long at you have good electrical isolation, high enough dielectric
breakdown voltage, and good grounding higher voltages can be
Peter Dambier wrote:
Apropos, I remember a frenchman who fed his personal computer 288 Volts DC.
Gives a whole new meaning to French Fries :)
Mike, sorry
On Wed, 27 May 2009, Peter Dambier wrote:
Theory says no matter whether the setting of the powersupply is 120 AC ord 240
AC it
should work. Try at your own risk. I haven't :)
I have. Was in the Netherlands last week, and plugged my laptop power
supply into the 240v (or so) feed, without
Just wondering if anyone can tell me their
opinion on Savvis bandwidth/company preferably
from a web host perspective. Considering a
connection.
Thanks,
David
Have used them since the days of Cable Wireless - almost flawless.
--
***Stefan
http://twitter.com/netfortius
On Wed, May 27, 2009 at 12:35 PM, David Hubbard
dhubb...@dino.hostasaurus.com wrote:
Just wondering if anyone can tell me their
opinion on Savvis bandwidth/company preferably
from a
On Wed, May 27, 2009 at 1:35 PM, David Hubbard
dhubb...@dino.hostasaurus.com wrote:
Just wondering if anyone can tell me their
opinion on Savvis bandwidth/company preferably
from a web host perspective. Considering a
connection.
They might be a good provider for reaching Comcast (when
Paul Wall wrote:
On Wed, May 27, 2009 at 1:35 PM, David Hubbard
dhubb...@dino.hostasaurus.com wrote:
Just wondering if anyone can tell me their
opinion on Savvis bandwidth/company preferably
from a web host perspective. Considering a
connection.
They might be a good provider for reaching
On Tue, 26 May 2009, Joe Greco wrote:
http://www.cdw.com/shop/products/default.aspx?edc=1036852
Great, you're the latest person to invent a way to present a 5-15R that
offers something besides 120VAC. This is neither new nor novel, but it
*is* dangerous and risky, and in no way solves the
Seems like if the c14 was connected to a 240v PDU the 5-15 would deliver
240v to the equipment, arc/pop tripping the breaker on the PDU as soon
as it is connected killing power to everything on that PDU.
Or am I missing something, Also hard to believe it is UL since the c14
is rated 125/250v and
david raistrick wrote:
On Tue, 26 May 2009, Joe Greco wrote:
http://www.cdw.com/shop/products/default.aspx?edc=1036852
Great, you're the latest person to invent a way to present a 5-15R that
offers something besides 120VAC. This is neither new nor novel, but it
*is* dangerous and risky,
david raistrick wrote:
On Tue, 26 May 2009, Joe Greco wrote:
http://www.cdw.com/shop/products/default.aspx?edc=1036852
Great, you're the latest person to invent a way to present a 5-15R that
offers something besides 120VAC. This is neither new nor novel, but it
*is* dangerous and risky,
On Wed, 27 May 2009, Seth Mattinen wrote:
Here's the L-G voltage off the 208v taps from an isolation transformer in a
system with no neutral: http://ninjamonkey.us/not_120_volts.jpg
Not 120, but 90 give or take. 90 is at the low end of the acceptable
range for common household 110/120v
The ground is not supposed to carry any current where as the neutral is.
If you tried to carry current on the ground of a CGFI protected circuit
it would trip.
-Original Message-
From: david raistrick [mailto:dr...@icantclick.org]
Sent: Wednesday, May 27, 2009 6:30 PM
To: Seth Mattinen
On 27 mei 2009, at 18:03, Peter Beckman wrote:
I haven't seen a PC power supply which is incapable of both 120v/
60hz and
240v/50hz in a very long time.
After this nice voltage discussion, what about hertz? Would it be more
efficient for us Europeans to run our stuff at 60 Hz rather than
On Tue, 26 May 2009, Joe Greco wrote:
http://www.cdw.com/shop/products/default.aspx?edc=1036852
Great, you're the latest person to invent a way to present a 5-15R that
offers something besides 120VAC. This is neither new nor novel, but it
*is* dangerous and risky, and in no way solves
On Wed, 27 May 2009, Joe Greco wrote:
... and move right on to outright misstatements?
No, statements based on personal experience. I -fully- expected to get
208v out of them, but in testing didn't.
Perhaps the ten I ordered were unique. Or perhaps I don't know how to
operate a VOM, or
Seems like if the c14 was connected to a 240v PDU the 5-15 would deliver
240v to the equipment, arc/pop tripping the breaker on the PDU as soon
as it is connected killing power to everything on that PDU.
Well, the latter half of that is making all sorts of assumptions. Your
typical 208V 20A
On Wed, 27 May 2009, Seth Mattinen wrote:
Here's the L-G voltage off the 208v taps from an isolation transformer in a
system with no neutral: http://ninjamonkey.us/not_120_volts.jpg
Not 120, but 90 give or take. 90 is at the low end of the acceptable
range for common household
On Wed, May 27, 2009 at 07:25:50PM -0400, david raistrick wrote:
On Wed, 27 May 2009, Joe Greco wrote:
... and move right on to outright misstatements?
No, statements based on personal experience. I -fully- expected to get
208v out of them, but in testing didn't.
Note that it is also
Subject: Re: Why choose 120 volts?
Date: Thu, 28 May 2009 01:11:41 +0200
On 27 mei 2009, at 18:03, Peter Beckman wrote:
I haven't seen a PC power supply which is incapable of both 120v/
60hz and
240v/50hz in a very long time.
After this nice voltage discussion, what about hertz?
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