Date:         Fri, 9 Jul 2010 20:28:26 -0500
Reply-To:     Alan Felder <dieseldoofus@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Alan Felder <dieseldoofus@GMAIL.COM>
Subject:      Re: 12 Volt Appliances: Correct Formula to Figure Amps Consumed?
In-Reply-To:  <AANLkTim5VAZQ6UOrcV3Vli0MWxT6oD1NmX6czoc_AYJT@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1

Hmmm...  that's odd.  I got 1 amp from that second url, but I did click off
the "3 phase" checkmark, since its dc current.

On Fri, Jul 9, 2010 at 8:08 PM, neil n <musomuso@gmail.com> wrote:

> Hi all.
>
> Viewing this:  http://tinyurl.com/23utmeo in the store, I wondered how
> many amps it would use. On the back it says: 12 Watts, 12 Volts. Only
> vaguely recalled Ohm's Law at that moment, didn't obviously know the
> resistance of the unit, so couldn't calculate amps used. Bought it
> anyway.
>
> At home checked current draw. Low -  0.45 amps. High - 0.6x amps
>
> But entering 12 volts and 12 watts here,
> http://www.the12volt.com/ohm/page2.asp shows 1 Amp. Here:
> http://www.csgnetwork.com/ohmslaw2.html  0.58 amps. They both *appear*
> to use the same formula though the latter gives closer to what I
> measured on high speed, hence the makers rating I assume.
>
> What am I missing or doing wrong? Or more to the point, what formula
> should I memorize?
>
> Looks were deceiving. Had it been over 1 amp draw, I likely wouldn't
> have purchased it thus saving time. As it turns out, for my needs,
> 0.45 amps/hour over a few nights use, shouldn't draw down my group 42
> aux. battery too far.
>
> Thanks!
>
> Neil.
>
>
> --
> Neil Nicholson '81 VanaJetta 2.0 "Jaco"
>
> http://tubaneil.googlepages.com/
>
>
> http://groups.google.com/group/vanagons-with-vw-inline-4-cylinder-gas-engines
>



--
Alan Felder
Austin TX
82 Diesel Westy