CALCULATIONS AND BRANCH FEEDER
CIRCUITS Questions and Answers Latest
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• Air conditioning overcurrent protective devices can never exceed what
percentage of the motor-rated load current or the branch circuit selection
current (whichever is greater)? -✓✓225%
• Conductors must be derated when installed in conduit -✓✓on or above
rooftops
• Continuous loads are calculated at what percentage of the maximum
current rating of the overcurrent device? -✓✓80%
• For a given load and length, the branch circuit voltage drop should not
exceed -✓✓3%
• For resistance welders, the rating for the overcurrent protection device
should not exceed what percentage of the primary current rating of the
welder? -✓✓300%
• Show window lighting is calculated at 200VA per linear foot plus -
✓✓125%
• The allowable ampacity for eleven No. 12 THHN copper conductors in
a cable must be adjusted by -✓✓50%
• The load for 10' of multi-outlet assembly used to supply several loads
simultaneously is -✓✓1,800VA