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6
Installation
kW
P
h
a
s
e
Recommended Over Current Protection
Rating
208 240 277 480
Voltage Copper Aluminum Copper Aluminum Copper Aluminum Copper Aluminum
208 240 277 480
Wire
Gauge
EMT
Conduit**
Wire
Gauge
EMT
Conduit**
Wire
Gauge
EMT
Conduit**
Wire
Gauge
EMT
Conduit**
Wire
Gauge
EMT
Conduit**
Wire
Gauge
EMT
Conduit**
Wire
Gauge
EMT
Conduit**
Wire
Gauge
EMT
Conduit**
3 1 20 20 15 10 14 1/2 12 1/2 14 1/2 12 1/2 14 1/2 12 1/2 14 1/2 12 1/2
6
1 40 35 30 20 8 3/4 8 3/4 10 1/2 8 3/4 10 1/2 10 1/2 14 1/2 12 1/2
3 25 20 NA 10 12 1/2 10 1/2 14 1/2 12 1/2 NA NA NA NA 14 1/2 12 1/2
9
1 55 50 45 25 6 3/4 4 1 8 3/4 6 3/4 8 3/4 6 3/4 12 1/2 10 1/2
3 35 30 NA 15 10 1/2 8 3/4 10 1/2 10 1/2 NA NA NA NA 14 1/2 12 1/2
12
1 75 65 55 35 4 1 3 1 6 3/4 4 1 6 3/4 4 1 10 1/2 8 3/4
3 45 40 NA 20 8 3/4 6 1 8 3/4 8 3/4 NA NA NA NA 14 1/2 12 1/2
15
1 95 80 70 40 3 1 1 1 1/4 4 1 2 1 1/4 4 1 3 1 8 3/4 8 3/4
3 55 50 NA 25 6 1 4 1 1/4 8 3/4 6 1 NA NA NA NA 12 1/2 10 1/2
18
1 110 95 85 50 2 1 1/4 1/0 1 1/2 3 1 1 1 1/4 4 1 2 1 1/4 8 3/4 6 3/4
3 65 55 NA 30 6 1 4 1 1/4 6 1 4 1 1/4 NA NA NA NA 10 1/2 10 1/2
24
1 145 125 110 65 1/0 1 1/2 3/0 2 1 1 1/4 2/0 1 1/2 2 1/4 1/0 1 1/2 6 3/4 4 1
3 85 75 NA 40 4 1 1/4 2 1 1/4 4 1 1/4 3 1 1/4 NA NA NA NA 8 3/4 8 3/4
27
1 165 145 125 75 2/0 1 1/2 4/0 2 1/0 1 1/2 3/0 2 1 1 1/4 2/0 1 1/2 4 1 3 1
3 95 85 NA 45 3 1 1/4 1 1 1/2 4 1 1/4 2 1 1/4 NA NA NA NA 8 3/4 6 1
30
1 185 160 140 80 3/0 2 250MCM 2 2/0 1 1/2 4/0 2 1/0 1 1/2 3/0 2 4 1 2 1 1/4
3 105 95 NA 50 2 1 1/4 1/0 2 3 1 1/4 1 1 1/2 NA NA NA NA 8 3/4 6 1
36
1 220 190 165 95 4/0 2 300MCM 2 1/2 3/0 2 250MCM 2 2/0 1 1/2 4/0 2 3 1 1 1 1/4
3 125 110 NA 55 1 1 1/2 2/0 2 2 1 1/4 1/0 2 NA NA NA NA 6 1 4 1 1/4
45
1 275 235 205 120 300MCM 2 1/2 500MCM 2 1/2 250MCM 2 350MCM 2 1/2 4/0 2 250MCM 2 1 1 1/4 1/0 1 1/2
3 160 140 NA 70 2/0 2 4/0 2 1/2 1/0 2 3/0 2 NA NA NA NA 4 1 1/4 3 1 1/4
54
1 325 285 245 145 400MCM 2 1/2 600MCM 3 300MCM 2 1/2 500MCM 2 1/2 250MCM 2 350MCM 2 1/2 1/0 1 1/2 3/0 2
3 190 165 NA 85 3/0 2 250MCM 2 1/2 2/0 2 4/0 2 1/2 NA NA NA NA 4 1 1/4 2 1 1/4
60
1 360 315 275 160 500MCM 2.5 700MCM 3 400MCM 2.5 500MCM 2.5 300MCM 2 1/2 500MCM 2 1/2 2/0 1 1/2 4/0 2
3 210 180 NA 90 4/0 2.5 300MCM 2.5 3/0 2 4/0 2.5 NA NA NA NA 4 1.25 3 1.25
72
1 NA NA NA NA NA NA NA NA NA NA NA NA 300MCM 2.5 600MCM 3 3/0 2 250MCM 2
3 250 220 NA 110 250MCM 2.5 350MCM 2.5 4/0 2.5 300MCM 2.5 NA NA NA NA 2 1.25 1/0 2
81 3 NA NA NA 125 NA NA NA NA NA NA NA NA NA NA NA NA 2/0 2 4/0 2 1/2
108
1 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
3 NA NA NA 170 NA NA NA NA NA NA NA NA NA NA NA NA 2/0 2 NA NA
* Table 1 - Minimum Branch Circuit and Wire Sizing Guide. Based on N.E.C. ANSI/NFPA 70 - 2002; Article 422.10(A); Article 240.6(A); Annex C Table C1 (EMT); Table 310.16
(Based on 75 C Type THW wire).
** Conduit size based on NEC Code, Annex C Table C1 Maximum Number of Conductors or Fixture Wires in Electrical Metallic Tubing (EMT); 3 wires for single phase; 4 wires
for 3 phase.
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