Feeder Schedule

FOUR-WIRE FEEDER SCHEDULE FEEDER NAME 20-4 30-4 40-4 60-4 70-4 100-4 125-4 150-4 175-4 200-4 225-4 250-4 300-4 350-4 400-4 450-4 500-4 600-4 700-4 800-4 1000-4 1200-4 1600-4 2000-4 2500-4 WIRE SIZE #12 #10 #8 #6 #4 #2 #1 #1/0 #2/0 #3/0 #4/0 #250 MCM #350 MCM #400 MCM #500 MCM (2) #4/0 (2) #250 MCM (2) #350 MCM (2) #500 MCM (2) #600 MCM (3) #400 MCM (3) #600 MCM (4) #600 MCM (5) #600 MCM (6) #600 MCM GROUND WIRE SIZE #12 #10 #10 #10 #8 #8 #6 #6 #6 #6 #4 #4 #4 #2 #2 (2) #1 (2) #1 (2) #1 (2) #1/0 (2) #1/0 (3) #2/0 (3) #3/0 (4) #4/0 (5) #250 MCM (6) #350 MCM CONDUIT SIZE 3/4" 3/4" 1" 1 1/4" 1 1/4" 1 1/4" 1 1/2" 2" 2" 2" 2 1/2" 2 1/2" 3" 3" 3 1/2" (2) 2 1/2" (2) 2 1/2" (2) 3" (2) 3 1/2" (2) 3 1/2" (3) 3 1/2" (3) 3 1/2" (4) 3 1/2" (5) 3 1/2" (6) 3 1/2" 208V MAX. 480V MAX. LENGTH LENGTH 98' 227' 109' 250' 123' 285' 128' 295' 169' 390' 176' 406' 171' 394' 182' 420' 182' 418' 192' 443' 203' 468' 202' 466' 211' 487' 194' 450' 191' 442' 203' 468' 202' 466' 210' 487' 219' 505' 207' 478' 205' 474' 207' 478' 207' 478' 207' 478' 199' 459' THREE-WIRE FEEDER SCHEDULE FEEDER NAME 20-3 30-3 40-3 60-3 70-3 100-3 125-3 150-3 175-3 200-3 225-3 250-3 300-3 350-3 400-3 450-3 500-3 600-3 700-3 800-3 1000-3 1200-3 1600-3 2000-3 2500-3 WIRE SIZE #12 #10 #8 #6 #4 #2 #1 #1/0 #2/0 #3/0 #4/0 #250 MCM #350 MCM #400 MCM #500 MCM (2) #4/0 (2) #250 MCM (2) #350 MCM (2) #500 MCM (2) #600 MCM (3) #400 MCM (3) #600 MCM (4) #600 MCM (5) #600 MCM (6) #600 MCM GROUND WIRE SIZE #12 #10 #10 #10 #8 #8 #6 #6 #6 #6 #4 #4 #4 #2 #2 (2) #1 (2) #1 (2) #1 (2) #1/0 (2) #1/0 (3) #2/0 (3) #3/0 (4) #4/0 (5) #250 MCM (6) #350 MCM CONDUIT SIZE 3/4" 3/4" 3/4" 1" 1 1/4" 1 1/4" 1 1/2" 2" 2" 2" 2 1/2" 2 1/2" 2 1/2" 3" 3 1/2" (2) 2 1/2" (2) 2 1/2" (2) 2 1/2" (2) 3 1/2" (2) 3 1/2" (3) 3" (3) 3 1/2" (4) 3 1/2" (5) 3 1/2" (6) 3 1/2" 208V MAX. 480V MAX. LENGTH LENGTH 98' 227' 109' 250' 123' 285' 128' 295' 169' 390' 176' 406' 171' 394' 182' 420' 182' 418' 192' 443' 203' 468' 202' 466' 211' 487' 194' 450' 191' 442' 203' 468' 202' 466' 210' 487' 219' 505' 207' 478' 205' 474' 207' 478' 207' 478' 207' 478' 199' 459' TWO-WIRE FEEDER SCHEDULE FEEDER NAME 20-2 30-2 40-2 60-2 70-2 100-2 125-2 150-2 175-2 200-2 225-2 250-2 300-2 350-2 400-2 450-2 500-2 600-2 700-2 800-2 1000-2 1200-2 1600-2 2000-2 2500-2 WIRE SIZE #12 #10 #8 #6 #4 #2 #1 #1/0 #1/0 #2/0 #4/0 250 MCM 350 MCM #400 MCM #500 MCM (2) #4/0 (2) #250 MCM (2) #350 MCM (2) #500 MCM (2) #600 MCM (3) #400 MCM (3) #600 MCM (4) #600 MCM (5) #600 MCM (6) #600 MCM GROUND WIRE SIZE #12 #10 #10 #10 #8 #8 #6 #6 #6 #6 #4 #4 #4 #2 #2 (2) #1 (2) #1 (2) #1 (2) #1/0 (2) #1/0 (3) #2/0 (3) #3/0 (4) #4/0 (5) #250 MCM (6) #350 MCM CONDUIT SIZE 3/4" 3/4" 3/4" 3/4" 1" 1 1/4" 1 1/4" 1 1/2" 1 1/2" 1 1/2" 2" 2" 2 1/2" 2 1/2" 2 1/2" (2) 2" (2) 2" (2) 2 1/2" (2) 2 1/2" (2) 3" (3) 2 1/2" (3) 3" (4) 3" (5) 3" (6) 3" 208V MAX. 480V MAX. LENGTH LENGTH 98' 227' 109' 250' 123' 285' 128' 295' 169' 390' 176' 406' 171' 394' 182' 420' 182' 418' 192' 443' 203' 468' 202' 466' 211' 487' 194' 450' 191' 442' 203' 468' 202' 466' 210' 487' 219' 505' 207' 478' 205' 474' 207' 478' 207' 478' 207' 478' 199' 459' NOTES: 1. Conduits smaller than 3" may be upgraded to the next larger size when used for underground installations or long runs. 2. Conduit sizes indicated are minimum recommended sizes, and may be increased for long circuits, or where multiple bends are necessary. 3. The feeder name represents its base ampacity and the number of wires (not including ground). 4. The base ampacity indicated in the feeder name does not account for voltage drop, fault current or temperature 5. All feeders for 120/208V panelboards with isolated ground (IG) bus shall include a separate IG conductor tied to the IG bus. 6. The rating of the overcurrent protection device may be lower, but not higher, than the rating of the feeder that it protects. 7. Maximum limits on the number of turns and conduit length should be verified for all underground installations. 8. Maximum feeder length is the length that produces a 3% voltage drop at the specified voltage, when the load is at the full ampacity of the feeder, and has a power factor of 90%. 9. Maximum feeder length does not apply if the feeder is sized for voltage drop rather than ampacity.