Flashcards
Load Calculations - Branch and Feeder Circuits
Cards in this deck (12)
- 1NEC Article 210 covers..branch circuits, except ones that supply only motor loads
- 2Branch circuits are rated by...the max. rating of the overcurrent device. NEC 210.3
- 3branch circuits shall be rated..15, 20, 30, 40 and 50A except for circuits serving individual equipment
- 4branch circuit conductors are required to be sized with and ampacity..rating no less than the maximum load to be served
- 5resistance in parallel eq.R = r1 x r2 / r1+ r2
- 6resistance in series eq.r = r1 + r2
- 7one switch can serve as both a disconnecting means and the controllert
- 8In NEC 430.250 the hp for motors is in what columnfar left
- 9NEC 430.6 states what about a motors full load current nameplate ratingis used to size ground fault protection for a torque motor
- 10for a sealed refrig. motor the nameplate rating will be used tothe current rating for
disconnecting means
controller
branch circuit conductor
oc devices
motor overload protection - 11what are the 2 types of oc protection for motor branch circuitsoverload
short circuit - 12—
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- Flashcards on Load Calculations - Branch and Feeder Circuits, created by Todd Kinderman on 29/10/2016.
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- Todd Kinderman
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