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 |
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