TOSHIBA
4.1.1 Recommended Wire Size and Tightening Torque for UPS Input/Output Terminals
of UPS Input and Output Terminals
Main Input &
Bypass Input
AWG
(H1 – H3,
BYP1, BYP2, BYP3)
AWG
(N, BYPN)
Tightening Torque
(in-lbs.)
208 VAC 300 MCM to 500 MCM 400 MCM to 500 MCM 375
380, 400, 415 VAC 2/0 AWG to 500 MCM 400 MCM to 500 MCM 375
480 VAC 1/0 AWG to 500 MCM 400 MCM to 500 MCM 375
600 VAC 1/0 AWG to 500 MCM 400 MCM to 500 MCM 375
Output AWG
(L1, L2, L3)
AWG
(OUTN)
Tightening Torque
(in-lbs.)
208 V/120 VAC 300 MCM to 500 MCM 400 MCM to 500 MCM 375
Battery Circuit AWG
(POS, NEG)
Tightening Torque
(in-lbs.)
288 VDC Nominal 400 MCM to 600 MCM 500
Input/Output
Ground
AWG
(GND)
Tightening Torque
(in-lbs.)
2 AWG minimum (see note 1) (see note 2)
All wire sizes are per NEC
Use copper wiring with at least 90°C rated insulation
Neutral Conductors are rated @ 1.73 or 200% of phase conductors, per NEC
Note 1: Use a UL listed lug suitable for the wire size used.
Note 2: Use tightening torque recommended by manufacturer of lug used.
14 4200FA User’s Manual