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Table 6 - Wire Size Requirements and Maximum Current Ratings
*Wire must be rated 75°C or higher
480 V Input:
UPS
rating
(kVA)
Rated
Current
(A)
Supply
Breaker
(A)
Minimum Wire
Size
Ground
Wire
Size
65 89 125
1/0
#6
80 109 150
2/0
#6
100 136 175
3/0
#6
125 160 200 250
kcmil #4
480 V Output:
UPS
rating
(kVA)
Rated
Current
(A)
Load
Breaker
(A)
Minimum Wire
Size
65 78 125
#2
80 96 150
1/0
100 120 175
2/0
125 150 200
4/0
208 V Input:
UPS
rating
(kVA)
Rated
Current
(A)
Supply
Breaker
(A)
Minimum Wire Size
Ground
Wire
Size
65
209
300
500 kcmil or 2 X 4/0
#4
80
256
350
2 X 350 kcmil
#3
100
317
400
2 X 350 kcmil
#3
125
360
450
2 X 500 kcmil
#2
208 V Output:
UPS
rating
(kVA)
Rated
Current
(A)
Load
Breaker
(A)
Minimum Wire Size
65
180
225
400 kcmil or 2 X 2/0
80
222
300
500 kcmil or 2 X 4/0
100
277
350
2 X 250 kcmil
125
346
450
2 X 500 kcmil
