CALCULATIONS AND BRANCH FEEDER
CIRCUITS (2026 Edition) Questions and Answers
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• NEC Table 430.52 -✓✓Maximum rating/setting of motor branch
circuit-short circuit and ground fault protection
• NEC 440.22 -✓✓Air Conditioning equipment will be no less than
175% of the nameplate amperage rating.
• Individual Branch Circuit -✓✓Connected to a single load with no
ampacity restrictions
• NEC 210.23(A)(2) limits cord-connected equipment to
____________________ percent of the branch-circuit ampere rating. -
✓✓80
• 210.23(A)(2) -✓✓Fastened-in-place loads may be connected with a
lighting/non-fastened load in one branch circuit; However, the fastened-
in-place load must NOT exceed 50% of the branch circuit current rating.
• 220.14 -✓✓Every outlet/receptacle per yoke is considered to pull 180
VA.
• Circuits must be de-rated when ________________ -✓✓The voltage
drop exceeds 3% of the service voltage for branch circuits (5% for
feeder AND branch circuits tied together); The number of conductors in
a raceway exceeds 3; When single conductors/multiconductors are
installed without any separation for 24" or more (no raceway)