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Conductor Sizing For Typical Motor/Power Feeder

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  1. Provides conductor size given load requirements per NEC code.
  1. Single Branch Circuit or Feeder Load
  1. National Electric Code NFPA - 70.
Step 1: Load Data
1.1 Load Voltage
1.2 Conductor Load
Step 2: Conductor Data
2.1 Conductor Type
2.2 Conductor Insulation
2.3 Temperature Rating of Conductor (in degrees Celsius)
Step 3: Installation Data
3.1 Min. Equipment Terminal Rating (in degrees Celsius)
3.2 Equipment Terminal Rating
3.3 Highest Ambient Temperature
3.4 Conductor Length
3.5 Number of Current Carrying Conductors
Step 4: Solve
4.1 Proof steps
4.2 Solve for conductor sizing