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Table 3 - Wire Size Requirements.
*Wire must be rated 75°C or higher. Use copper conductors only.
kVA
Rating
Minimum Input Wire
Size
Minimum Output Wire
Size
Minimum
Ground
Wire Size
Required
Supply
Breaker
160
500 kcmil or (2) 2/0
AWG
300 kcmil
3 AWG
300 A
200
(2) 3/0 AWG
500 kcmil or (2) 2/0
AWG
2 AWG
350 A
250
(2) 300 kcmil
(2) 4/0 AWG
1 AWG
450 A
Table 4 - Recommended Crimp Lugs
Bolt Size
Wire
Thomas & Betts Two
Hole Connectors
Thomas & Betts Single
Hole Connectors
3/8
2/0
54210
54110
3/0
54211
54111
4/0
54212
54112
250 kcmil
54213
54174
300 kcmil
54214
54179
350 kcmil
54215
256-30695-112
400 kcmil
54216
54116
500 kcmil
54218
256-30695-339
Table 5 - Maximum Current Ratings
kVA Rating
Rated Input
Current (Amps)
Rated Output Current
(Amps)
160
212
192
200
265
241
250
331
301
Table 6 - Terminal Tightening Torques
INPUT / OUTPUT/NEUTRAL TERMINAL TORQUE
Bolt Size
Torque
3/8 - 16
260 inch - pounds
GROUND LUG TORGUE
Wire Size
Torque
#6 AWG – 300 kcmil
275 inch - pounds
LOW VOLTAGE TERMINALTORQUE
Wire Size
Torque
# 26-10 AWG
5.3 – 7.0 inch - pounds