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E2 Exam 2 Cheat Sheet (DRAFT) by

Page 2 of an E2 exam cheat sheet

This is a draft cheat sheet. It is a work in progress and is not finished yet.
 

Motor branch circuit & Feeder sizing

1-Find FLA Go to 430.250 find volts match to HP= FLA. ADD 125%
2-Cond­uctor Ampacity Go to 310.16 find small conductor( next size up)
3-Over­current Protec­tio­n(OCPD)FLA + Inverse time breake­r=250% of FLA 430.52. Then 240.6 Round up for standard breaker size.
4- Feeder 125% largest + 100% others.
Service Calc +25% largest motor FLA