[31395] in North American Network Operators' Group
Re: Is there an electrician in the house?
daemon@ATHENA.MIT.EDU (Robert M. Enger)
Thu Sep 21 21:28:22 2000
Message-Id: <4.3.2.7.2.20000921211247.00e06600@seka.erols.net>
Date: Thu, 21 Sep 2000 21:25:33 -0400
To: rdobbins@netmore.net, Phil Reese <preese@www.tv>
From: "Robert M. Enger" <enger@seka.erols.net>
Cc: nanog@merit.edu
In-Reply-To: <39CAAFCD.9172312A@netmore.net>
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Errors-To: owner-nanog-outgoing@merit.edu
If your load, including inrush surge, really is below
the rating of the circuit, then you should be able
to build your own "twofer".
Buy a double-deep quad-box, some 10/3 S cord, and
the correct sockets and plugs.
http://www.leviton.com/sections/prodinfo/receptic/sheets/vomax.htm
If you want to be conservative, have a MASTER electrician
build them for you.
Bob
At 06:03 PM 9/21/00 -0700, Roland Dobbins wrote:
> From the URL you sent:
>
> Note: The CCPDUs plug directly
> into the back of Matrix-UPS and
> should not be used with wall
> outlets.
>
>A grounding issue, maybe?
>
>You could just buy the Matrix battery back-ups to use with the CCPDUs,
>then plug the single cord from the Matrix into the provided socket.
>Redundant, but it should solve the problem - and shouldn't cost
>$5K/month, either.
>
>
>Phil Reese wrote:
> >
> > My company is finishing up the build out of a number of ccTLD DNS and
> > web server data centers in collocation space. We've run into the
> > following issue that I'd be interested in this group's opinion.
> >
> > Our data centers will have a number of Linux servers running on 110v
> > power, no problem there, just plug into the power strips provided. Then
> > we'll have a couple IBM S80 servers and two trays of disks that both
> > require 208v 30amp and an L6 plug. Now the max rated power of all the
> > devices is well within the two 208/30 circuits we've ordered.
> >
> > The difficulty is that the collocation company provides a single L6
> > receptacle per circuit deployed. We'd planned on putting one S80 server
> > and one tray of disks on each of the two circuits. HOWEVER, each box
> > has its own cord and plug, i.e., two plugs. APC, and I'm sure others,
> > make essentially a 208/30amp outlet strip
> > (http://www.apc.com/products/accessories/wiring_ccpdu.cfm , cost between
> > $185-$200) that we'd planned to use.
> >
> > As we finish up the build out, the collocation company has informed us
> > that the device, such as the APC, are not allowed. Their only suggested
> > solution is to purchase as many circuits as we have plugs to connect.
> > Of course each additional 30 amp circuit will cost us just over
> > $1k/month! All totaled, we'd need an additional 5 circuits between our
> > east and west coast locations, or just over $5k/mo, $60k/yr, versus
> > $1000 one time fee to APC!
> >
> > By definition, collocation companies need to be paranoid about
> > everything. However, when I asked them what is the issue with the APC
> > device they just invoked 'this could cause an overload and potential
> > fire hazard' as their technical position on why this passive, UL listed,
> > device isn't allowed.
> >
> > Can anyone explain their side of the story, citing a bit more
> > technologically based explanation?
> >
> > Phil Reese
>
>--
>------------------------------------------------------------
> Roland Dobbins <rdobbins@netmore.net> // 818.535.5024 voice
======================
Robert M. Enger
enger@seka.erols.net
Work: +1.703.208.5555
Cell: +1.202.256.2222
PGP Key ID: 0x5A815C1F
