[DJ88]

Marc, You'll be using probably twice the power with the jacuzzi tho. Why go that route? 1/2 the power for more water volume..

Steve,

I know the numbers don't add up. I think they are not telling us about all the losses in the motor itself. Still tho this pumps pushes more water than anything else around. I'lls till use it but know I knwo what the 'real' numbers are and won't fool myself into thinking it is less than it is.

When I was told to measure what the motor is using they wanted me to measure across only a couple of poles in it. Right there it shows we aren't taking into account the whole load the motor is placing on your house circuitry.

I didn't liek the explanation but I have a feeling(after testing the MAK4) that it will be the same for everything I run these tests on. Which bites.

I can understand a manufacturer supplying the bench ratigs. BUt once it is assembled there shoudl also be ratings for the useable power ratings.

I was given a good analogy yesterday. When you buy a vheicle and are told it has x number of horsepower that is a bench rating. Once you slap it into a vheicle you lose a lot due to transmission, frictional losses etc etc etc. It is the same with these and any other pumps. There are losses. frictional, resistive etc. It just bites we are lead into believeing that the numbers we are given are the ones we actually see in real life.

As for the losses the ampmaster has I'd assume that it is more than line losses. Friction will play a big part in it. Whether it is due to friction in the windings, resistence of the water fom wanting to move or what ever. THey are there.

Dollar for dollar tho to get the equal in water volume moved you'd need to run three MAK4's which cost $269 a piece. You'd be using more power and two of these things is more expensive than one Ampmaster.

In the long run I will still use the ampaster. tho I am not happy with the little 'deception'.

sigh waht can you do. Manufacturers have us kinda over a barrel. Either we use the pumps they give us or we dont' use anything at all. We can use jacuzzi pumps but I'd hazard a guess they use a heck of a lot more power than the pumps we are using now.

If the plackard onthe jacuzzi says it draws 4.5 amps I'd bet it draws a lot more. I was told by DOlphin it is the standard in the industry to show bench ratings and not actual ratings. so I doubt the manufacturer of the jacuzzi pumps will be different.

clear as mud???

Marc we will have to test one and see for sure.

[ 25 May 2002, 11:17: Message edited by: DJ88 ]