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I thought you were talking about the motor. I'll not disagree on what the complete pump/motor should draw. I'm happy with the motor not being pushed above its design load.

I disagree. Rated full load current is 10.5 amps.

At full rpm it draws 9.25 amps.

Update. I put this motor on using the xxx10 impeller. 1.65 hp at full rpm. After over 24 hours it's running below FLC. Perhaps the motor was defective. Thanks to all who pitched in.

Hah! I haven't had to do power factor calcs since I was a 2nd year apprentice! I remember PF=True Power/Apparent Power, and that's about all. SPX3005C is typically for a 1/2HP. ?????

Uncoupled draw is 6.5 amps. No tripping. Impeller with diffuser attached spins smoothly. When I turn off the power the motor spins down normally and the run switch clicks. Note how I have to close off almost all suction to get the amps to 9. Ring is SP 3005R and is installed correctly.

I keep head pressure at the cartridge filter at 15psi or less. Is this good or bad?

The pump is probably the one that was installed when the house was built in 1991. The only part left original is the housing, maybe the diffuser and seal plate. The new impeller is Hayward Super II & RS 1.0 HP and 1.5HP Up Rated Impeller - SPX3010C and my old diffuser and seal plate are still...

I'll buy your highlighted ring and try it. Cheap fix?

It's on the pump. Maybe I'll remove it again tomorrow and post a pic.

To get back to the present, the motor was only drawing 9.0 amps and its FLC rating was 9.3. I'm able to closely watch amps because I cut in an ammeter on the electric panel dead front. To get to 9 amps, I had to close off suction. If I opened the skimmer, bottom, and side (atlas) valves, the...

This is from a while back, not now.

Ugh, that's not my impeller.

I replaced the impeller, which is the pump. The diffuser shouldn't matter that much, should it?

Restricting the suction was how I got it to run under FLA. FLA is 9.3 and it tripped on 9.0.

Well, per the impeller chart I've used the 2 impellers that should be on a 1.5 hp motor. Other than buy a 1.65 hp variable speed motor kit that includes another impeller, I don't know what to do.

I'm certain everything is in correctly. The bottom line is that this motor is tripping at 9 amps, and flc is 9.3.

Just checked. 60 HZ exactly.

James, that's why I replaced that motor with this one I'm writing about. Everything else electrical in the house works fine. I agree something is off.

I did get a refund on the motor. Per the hayward chart I've got the right impeller. If this motor's tripping at or below flc then the problem is the motor, right?

233.6V under load, 9.1 amps. Ran for 90 seconds then tripped.