How to Size a Motor using WOLF method

Published 2018-05-21
In this video we talk about how to size a motor using the WOLF method. What is the WOLF method? Well it is a simple way to size the conductors as well as sizing the Over loads and the Fuse.

W = FLC x125%


OL = FLA x art 430.32 depending on the nameplate info

F = FLC x art 430.52 depending on type of fuse or breaker


To find the FLC you need to refer to the NEC in Article 430.247 - 430.250.

FLC - Full Load Current
FLA - Full load Amps

All Comments (21)
  • Dude you’re amazing… helping me through what would take me years to figure out myself
  • I really appreciate your videos. I've been a journeyman for 13 years and I feel like your videos are very easy to understand and it wasn't this easy in school. :-) thanks again
  • I am studying for my license exam in NC. You're videos help so much. It's step by step for dummies like me 😁
  • @blayton1212
    Very well done ! . I lot of guys teach this, but you take out all the mobo jumbo and get right to the point !
  • @DS-zo8xs
    Thank you so much. 3rd year apprentice here that needed a little extra help.
  • Welcome back Craig , your videos are always very through , thank you Rick
  • @jarrydee2799
    about to take my masters test in michigan in a few months.. Thank you for these videos. I used them for my Jman test and now for my masters
  • @levigodro9827
    Your explanations are great !!! I wish you we’re instructing in our school !!! Thanks and keep up the great videos !!! Thanks
  • Thanks so much! This simplified the problem a lot and helped me to understand. Appreciate it!
  • Love the video man, you did a great job explaining motors and made it a relatively easy process to understand. One question though, where did you get the under 100 amp rule use the 60 degree column for table 310.16 for wire sizing?
  • @sarag1158
    Taking my CA code test on Friday. Grounding and Bonding and Motors are a weak spot for me. Thanks for the videos.
  • @ubaidansari8030
    very well explained sir, could you please tell the book name from which you have referred the chart.
  • @michaelm4865
    Thank you for the video. I am curious if there is no stated fuse type to use, then how would you make your selection in 430.52?
  • @bigjesskennelz
    I'm still wondering why you used the 460 column for 480v? I'm not sure if I missed it on the video. Awesome videos though.