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4200FA Installation and Operation Manual 29
6.3.1 Recommended Wire Size and Torque Requirements for 50kVA
Minimum wire sizes are based on NEC Table 310.16. Neutral wire is sized per NEC Article
310.15(B), Grounding wires sized per NEC Article 250.122. Maximum wire capacity of the power
terminal lugs is 250kcmil.
Table 6.7 50kVA Cabling Sizes
Minimum / Maximum Wire Size and Torque Requirements
UPS Input and Output Terminals TB1 50 kVA*
(USE MINIMUM 75 °C INSULATED COPPER WIRING)
INPUT:
OUTPUT:
(H1) (H2)
(H3)
AWG
NEUTRAL
AWG
(L1)(L2)
(L3)
AWG
NEUTRAL
AWG **
Tightening
Torque
208 V 2/0 – 250 kcmil 250 kcmil 208/120 V 2/0 – 250 kcmil 250 kcmil 200 in-lbs.
220 V 2/0 – 250 kcmil 4/0 – 250 kcmil 220/127 V 2/0 – 250 kcmil 4/0 – 250 kcmil 200 in-lbs.
240 V 2/0 – 250 kcmil N/A 240 V 1/0 – 250 kcmil N/A 200 in-lbs.
380 V 2 – 250 kcmil 1/0 – 250 kcmil 380/220 V 4 – 250 kcmil 1/0 – 250 kcmil 200 in-lbs.
400 V 3 – 250 kcmil 1/0 – 250 kcmil 400/230 V 4 – 250 kcmil 1/0 – 250 kcmil 200 in-lbs.
415 V 3 – 250 kcmil 1 – 250 kcmil 415/240 V 4 – 250 kcmil 1 – 250 kcmil 200 in-lbs.
480 V 4 – 250 kcmil 2 – 250 kcmil 480/277 V 6 – 250 kcmil 1 – 250 kcmil 200 in-lbs.
600 V 6 – 250 kcmil N/A 600 V 6 – 250 kcmil N/A 200 in-lbs.
Table 6.8 Bypass Cabling Sizes
Minimum / Maximum Wire Size and Torque requirements
UPS Optional Bypass Input Terminals TB4 50 kVA
(USE MINIMUM 75 °C INSULATED COPPER WIRING)
Phase: (A) (B) (C) (N)
Input: (H1) (H2) (H3)
50 kVA
AWG*
NEUTRAL AWG*
Tightening Torque
208/120 V 1/0 – 250 kcmil 250 kcmil 200 in-lbs.
220 V 1/0 – 250 kcmil 250 kcmil 200 in-lbs.
240 V 1/0 – 250 kcmil N/A 200 in-lbs.
380 V 2 – 250 kcmil 2/0 – 250 kcmil 200 in-lbs.
400 V 3 – 250 kcmil 2/0 – 250 kcmil 200 in-lbs.
415 V 3 – 250 kcmil 1 – 250 kcmil 200 in-lbs.
480 V 4 – 250 kcmil 2 – 250 kcmil 200 in-lbs.
600 V 6 – 250 kcmil N/A 200 in-lbs.