Re: DATACENTER: Clamp ammeters (fwd)

[Robert Chew <robert@verio.net>]

--
Robert David Chew  rchew@verio.net [Verio, Inc., Oregon Office (503) 227-5665, x216]

---------- Forwarded message ----------
Date: Fri, 20 Nov 1998 19:14:25 -0800 (PST)
From: Robert Chew <robert@verio.net>
To: Peter Polasek <pete@cobra.brass.com>
Cc: datacenter@shorty.com
Subject: Re: DATACENTER: Circuit Breaker with a built in power meter?

On Fri, 20 Nov 1998, Peter Polasek wrote:
> 
> Anybody have any specific recommendations for a high quality inductive
> Amp meter?

John Fluke:

model 31	400Amps AC 2%, 0.01A resolution, bar graph	
$229 in Jensen Catalog

model 33	400Amps AC 2%, 0.01A resolution, bar graph, Min Max
$269 in Jensen Catalog

model i410	400Amps AC/DC 3.5%
$174 in Jensen Catalog

This last is a current probe that needs to be used with a digital multimeter,
but will do DC if you are using -48V.

Robert

> On Thu, 19 Nov 1998, Ken Woods wrote:
> 
> > 
> > Only if you can clamp across the neutral.
> > Otherwise, you're going to get false readings.
> > 
> > Another suggestions would be to add up the power being consumed by the
> > equipment that is on each circuit, (this will probably be in watts), and 
> > then convert that to amps.
> > 
> > Also, don't assume that a 15A breaker will support 15A.  It won't.
> > 
> > -- 
> > Ken Woods 
> > kwoods<at>verio.net 
> > 
> > 
> > 
> > On Thu, 19 Nov 1998, scott w wrote:
> > > 
> > > Get a clamp amp meter.  It measures amperage unintrusively using
> > > inductance.
> > > 
> > > scott
> > > 
> > > On Thu, 19 Nov 1998, Mark Vickers wrote:
> > > 
> > > > I'm building a new datacenter and will have 300 15amp circuits.  I'd like
> > > > to come up with a way to figure out how close we are to blowing the fuse on
> > > > each one of them.
> > > > 
> > > > -Vickers
> > > > 
> > > 
> > 
> > 
> > 
> > 
> 

--
Robert David Chew  rchew@verio.net [Verio Northwest, Oregon Division (503) 227-5665]