Motor Calculations : Remembering!

[starbright28]

Is there a goo way of remembering how to do motor calculations for a test? Since you pretty much have to remember on how you do the problem, without notes, I'm wondering what a good way to remember this by.

I struggle with motor calcualtions. Tried doing one tonight, and referred to my notes. I still came up with the wrong answer, so not sure what I am doing wrong or right at this moment. Will re-visit here in a while.

Any input is welcome. I look forward on trying to remember this concept since I know it is on the test.

 

[celtic]

I struggle with motor calcualtions. Tried doing one tonight, and referred to my notes. I still came up with the wrong answer, so not sure what I am doing wrong or right at this moment. Will re-visit here in a while.

Have you checked ["Mike's Free Stuff"] ?

http://www.mikeholt.com/mojonewsarchive/EC-HTML/HTML/Motor_Calculations_-_Part_1~20030303.htm

http://www.mikeholt.com/mojonewsarchive/EC-HTML/HTML/Motor_Calculations_-_Part_2~20030306.htm

EC&M has some good stuff, also:
http://www.ecmweb.com/nec/code_calc_072304/

http://www.ecmweb.com/nec/index12.html

Here's one from the Engineering Toolbox:
http://www.engineeringtoolbox.com/electrical-systems-t_33.html

Post the question...let your "team" help you out.

 

[bphgravity]

This is as basic as it gets:

Step 1: Find the FLC of motor using Article 430 tables.

Step 2: Find motor running overload protection per 430.32

Step 3: Find branch circuit conductor size per 430.22

Step 4: Find branch circuit overcurrent protection per 430.52

Step 5: Find motor feeder conductor size per 430.24

Step 6: Find feeder overcurrent protection per 430.62

 

[starbright28]

thanks - any help is appreciated to help in aid of remembering on how to do motor calculations.

 

[starbright28]

Help!!!

Help!!!

EDIT: i talked with my dad and he too gets the same answer. 250 kcmil. IS anyone going to respond to my posts anymore? I seem to be getting not replied. Maybe I will just post new threads for my questions then.

Second Edit: deleted message because of no replies and put into new thread.