26 4300 Series Ancillary Cabinets Installation and Operation Manual
Table 10.3 - 431A Input/Output Power Cable Sizes
(Cable sizes for 75°C Copper Cable)
Recommended/Maximum Wire size and Torque Requirement
Trans-
former
Code Input/Output Trans-
former Voltage
Xfmr Type 30 kVA 50 kVA Tightening
Torque
Phase AWG* Neutral AWG* Phase AWG* Neutral AWG*
Input B 208VΔto208/120VY Input Iso 2 - 250 kcmil N/A 2/0 - 250 kcmil N/A 200 in.-lbs.
C240VΔto208/120VY Input Iso 3 - 250 kcmil N/A 1/0 - 250 kcmil N/A 200 in.-lbs.
N380VΔto208/120VY Input Iso 6 - 250 kcmil N/A 3 - 250 kcmil N/A 200 in.-lbs.
N400/415VΔto208/120VY Input Iso 6 - 250 kcmil N/A 3 - 250 kcmil N/A 200 in.-lbs.
S480VΔto208/120VY Input Iso 6 - 250 kcmil N/A 4 - 250 kcmil N/A 200 in.-lbs.
M600VΔto208/120VY Input Iso 6 - 250 kcmil N/A 6 - 250 kcmil N/A 200 in.-lbs.
X208/120V Y 4 wire input
(No Transformer)
N/A 1/0 - 250 kcmil 4/0 - 350 kcmil 250 kcmil 350 kcmil 200 in.-lbs.
K480/277V Y to 208/120V Y Input Auto 6 - 250 kcmil 3 - 350 kcmil 3 - 250 kcmil 2/0 - 350 kcmil 200 in.-lbs.
Output F 208/120V Y 4 wire input
(No Transformer)
N/A 1/0 - 250 kcmil 4/0 - 350 kcmil 250 kcmil 350 kcmil 200 in.-lbs.
H208/120V Y to 220/127V Y Output Auto 1 - 250 kcmil 4/0 - 350 kcmil 4/0 - 250 kcmil 350 kcmil 200 in.-lbs.
J208/120V Y to 240/139V Y Output Auto 2 - 250 kcmil 3/0 - 350 kcmil 3/0 - 250 kcmil 350 kcmil 200 in.-lbs.
P208/120V Y to 380/220V Y Output Iso 4 - 250 kcmil 1 - 350 kcmil 1 - 250 kcmil 4/0 - 350 kcmil 200 in.-lbs.
Q208/120V Y to 400/230V Y Output Iso 4 - 250 kcmil 1 - 350 kcmil 2 - 250 kcmil 3/0 - 250 kcmil 200 in.-lbs.
K208/120V Y to 480/277V Y Output Auto 6 - 250 kcmil 3 - 350 kcmil 3 - 250 kcmil 2/0 - 250 kcmil 200 in.-lbs.
M208/120V Y to 600/347V Y Output Iso 6 - 250 kcmil 4 - 350 kcmil 4 - 250 kcmil 1/0 - 250 kcmil 200 in.-lbs.
* Wire capacity for Phase lugs is 250 kcmil - 6 AWG, Neutral lugs is 350 kcmil - 6 AWG.