[rescue] Sequent info anywhere (on the web)?

[Chris Kennedy]

Greg A. Woods wrote:

> Drives, esp. older ones, require LOTS of power.
> 
> 220vac is a very common household service, even at 30A

All true.  However, most older power-hog drives aren't
220 1ph, they're 208 3ph. 

> I have a 200A service panel, an upgrade done in about 1983 by a former
> owner -- many houses in North America still have 100A or even just 60A
> service panels though.  My colleage, also with two of these same 3.1Kva
> UPS units, but with almost four times as many square feet as our house,
> had only 100A, and had to get it upgraded in order to hook up even one
> UPS.  :-)

It's hard to imagine that people still have 60A service panels.  Scary,
even.

Chris
Who just upgraded to 400A service, has a 60KW 12-wire reconnectable
generator sitting on a trailer waiting to be installed, along with a 
small army of PV's (just to make things interesting). I _did_ ask the local
power company about getting 3ph; the engineer literally laughed...

--
Chris Kennedy
chris at mainecoon.com
http://www.mainecoon.com
PGP fingerprint: 4E99 10B6 7253 B048 6685  6CBC 55E1 20A3 108D AB97


> -----Original Message-----
> From: rescue-admin at sunhelp.org [mailto:rescue-admin at sunhelp.org]On
> Behalf Of 
> Sent: Friday, January 18, 2002 11:36 AM
> To: rescue at sunhelp.org
> Subject: RE: [rescue] Sequent info anywhere (on the web)?
> 
> 
> [ On Friday, January 18, 2002 at 13:45:14 (-0500), William Enestvedt wrote: ]
> > Subject: RE: [rescue] Sequent info anywhere (on the web)?
> >
> >    (Information follows for the archives.) I was moving floor tiles and
> > poking at outlets, and it looks like the CPU box runs on regular wall
> > current, as does the terminal and the tape drive. The external drive
> > cabinet, however, runs under the raised floor to some scary-ass 220 box
> > (which is on a separate 30-amp circuit).
> 
> Drives, esp. older ones, require LOTS of power.
> 
> 220vac is a very common household service, even at 30A.
> 
> (Most everyone on the grid has at least one of an electric stove,
> an electric water heater, an electric clothes dryer, etc., and they all
> take 220vac, sometimes up to 40A or so.)
> 
> I just recently installed, at home, two 20A 220vac circuits for my new
> UPS's.  (the UPS units are 3.1kva each, and though they're only supposed
> to draw 16A when charging, the code requires 20A circuits for anything
> over 12A continuous, and indeed they came with 20A twist-lock connectors)
> 
> I have a 200A service panel, an upgrade done in about 1983 by a former
> owner -- many houses in North America still have 100A or even just 60A
> service panels though.  My colleage, also with two of these same 3.1Kva
> UPS units, but with almost four times as many square feet as our house,
> had only 100A, and had to get it upgraded in order to hook up even one
> UPS.  :-)
> 
> The thing you should really be concerned about is that depending on your
> circumstances you may need about as much more current for cooling
> purposes, at least at some times of year.  Electronics equipment almost
> always turns all of the power it draws into heat.  Even if those drives
> only draw 15A at 220vac or so, that's like having a clothes dryer running
> full blast all of the time, with the vent directed into your room.
> 
> -- 
> 								Greg A. Woods
> 
> +1 416 218-0098;  <gwoods at acm.org>;  <g.a.woods at ieee.org>;  <woods at robohack.ca>
> Planix, Inc. <woods at planix.com>; VE3TCP; Secrets of the Weird <woods at weird.com>
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