nanog mailing list archives
Re: Want to move to all 208V for server racks
From: Jay Ashworth <jra () baylink com>
Date: Thu, 2 Dec 2010 15:54:15 -0500 (EST)
----- Original Message -----
From: "Ingo Flaschberger" <if () xip at> in europe GFIs are always needed for prection and by law. to avoid the cascading effects the GFCIs are better. break current ranges from 10mA (bath) up to 300mA; for servers I use the 30mA with pulse protection (internal delay) to avoid the server powersupply capacitor loading GFCIs "flip".
And that, indeed, is one of the circumstances in which Chris Lewis and Steve Bellovin's Wiring FAQ suggests that you should *not* use a GFCI: in places where the inevitable "nuisance trip" is troublesome, like powering servers. That FAQ is a bit dated, of course. And indeed, I never liked GFCI breakers for the usages for which they're mandated in the US, cause the milliamp currents they're supposed to trip on are no match for all that copper resistance... Cheers, -- jra
Current thread:
- Re: Want to move to all 208V for server racks, (continued)
- Re: Want to move to all 208V for server racks Leo Bicknell (Dec 02)
- Re: Want to move to all 208V for server racks Owen DeLong (Dec 02)
- Re: Want to move to all 208V for server racks Kevin Day (Dec 02)
- Re: Want to move to all 208V for server racks Jay Ashworth (Dec 02)
- Re: Want to move to all 208V for server racks Ingo Flaschberger (Dec 02)
- Re: Want to move to all 208V for server racks Ingo Flaschberger (Dec 02)
- Re: Want to move to all 208V for server racks Kevin Day (Dec 02)
- Re: Want to move to all 208V for server racks Ingo Flaschberger (Dec 02)
- Re: Want to move to all 208V for server racks Kevin Day (Dec 02)
- Re: Want to move to all 208V for server racks Ingo Flaschberger (Dec 02)
- Re: Want to move to all 208V for server racks Jay Ashworth (Dec 02)
- Re: Want to move to all 208V for server racks Steven Bellovin (Dec 02)
- Re: Want to move to all 208V for server racks Darren Bolding (Dec 02)
- Re: Want to move to all 208V for server racks Seth Mattinen (Dec 02)
- Re: Want to move to all 208V for server racks Ricky Beam (Dec 02)
- Re: Want to move to all 208V for server racks Antonio Querubin (Dec 02)
- Re: Want to move to all 208V for server racks mikea (Dec 02)
- Re: Want to move to all 208V for server racks Antonio Querubin (Dec 02)
- Re: Want to move to all 208V for server racks Jay Ashworth (Dec 02)
- Re: Want to move to all 208V for server racks Gary Buhrmaster (Dec 02)
- Re: Want to move to all 208V for server racks Nathan Stratton (Dec 02)