nanog mailing list archives
Re: rack power question
From: Lamar Owen <lowen () pari edu>
Date: Mon, 24 Mar 2008 16:07:51 -0400
On Monday 24 March 2008, Robert E. Seastrom wrote:
Lamar Owen <lowen () pari edu> writes:While this discussion might seem out of the ordinary for a network operator's group, it is a very good discussion.The sad part is the extraordinariness of discussions that are so solidly on-topic as this one. Thanks for your contribution; I (at least) really appreciate it.
You're quite welcome. There is a whole 'nother side to this, too, especially for those who run DC power. The ampacity of conductors is quite a bit higher for DC; I have a copy of the best book on that subject, written by a telco engineer. Let's see: "DC Power System Design for Telecommunications" by Whitham D. Reeve, Wiley is the publisher. This is an expensive book; about $100 from Wiley; low price on Amazon right now is $75.75. This one goes over EVERYTHING when it comes to DC power distribution design and implementation. It was worth the price I paid, that's for sure. We have two 200A Lorains here, with A battery being 450Ah of C&D flooded cells, and B battery being a bank of 4 135Ah 12V sealed AGM batteries. Our core switches and all but one of our core routers have DC power supplies. Incidentally, all of this is fresh to me primarily because I'm in the process of building a new datacenter and moving our existing equipment into it, primarily for RFI mitigation reasons. -- Lamar Owen Chief Information Officer Pisgah Astronomical Research Institute 1 PARI Drive Rosman, NC 28772 (828)862-5554 www.pari.edu
Current thread:
- RE: rack power question, (continued)
- RE: rack power question John Lee (Mar 22)
- Re: rack power question Justin M. Streiner (Mar 23)
- Re: rack power question david raistrick (Mar 23)
- Re: rack power question Leo Bicknell (Mar 23)
- Re: rack power question Petri Helenius (Mar 23)
- RE: rack power question Ray Burkholder (Mar 23)
- RE: rack power question Jon Lewis (Mar 23)
- RE: rack power question John Curran (Mar 23)
- Re: rack power question Paul Vixie (Mar 23)
- RE: rack power question Mike Tancsa (Mar 23)
- Re: rack power question Petri Helenius (Mar 23)
- Re: rack power question Lamar Owen (Mar 24)