Quote:
Originally posted by DodgeViper
Remember, AMP X VOLTS = WATTS
1.26 AMP X house current 117 VOLTS =147.42 WATTS
147.42 WATTS of energy added to the water.
This would not be a good buy.

Didn't really pay attention to this the first time I saw it.
Amps X Volts = Watts is only guaranteed to be true for DC systems.
For AC systems where the voltage and current are sine waves the equation is:
Amps X Volts X Cosine(phase angle) = Watts
The current through a pump is usually substantially phase shifted with respect to the voltage, which means that the power consumption will be substantially less than the Amps X Volts.
Also, centrifugal pumps draw less power when their output is restricted than when it is wide open. It's very hard to say how much power this pump would consume in a watercooling setup.
Quote:
Originally posted by UnLoadeD
I was looking at the 15rt's but the .82amps kinda scared me off. Do you guys think that would add too much heat to the water?

It's seems odd to me that the MD15 draws .82 Amps when the MD20's only draw 0.5 Amps. I'm not sure what to make of that. I think nikhsub1 said somewhere that the power consumption of the MD15 was only a few Watts higher than an Eheim 1250. I haven't seen the power consumption spec'd though.
My MD20RT (220 Volt version) is spec'd to have a maximum current draw of 0.28 Amps and a max power consumption of 57 Watts. It has a big capacitor inside that probably reduces the phase angle of the current though. I'd guess the MD15 just doesn't have a phase correction cap. (This is not a big deal IMO.)
I did some testing on a Danner Mag5. (Spec'd for 45 Watts power consumption) At 122.6V it drew 0.8 Amps with a power consumption of 35 Watts with a 'low' flow restriction. It drew 0.76 amps with a power consumption of 24.6 Watts with a 'high' restriction.
If you can't find a power consumption spec for the MD15, just ask nikhsub1, but I don't think it's something to be too concerned about though.