Vertiv Liebert EXM MBC, User Manual

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Vertiv
™
| Liebert
®
EXM
™
MBC Installation Manual | 43
3.2 Torque Requirements
All electrical connections must be tight.
Tables 21 and 22 provide the torque values for the connections to the Liebert EXM MBC. Use
these values unless the equipment is labeled otherwise.
250kcmil 54174 60154
300kcmil 54179 60160
350kcmil 256-30695-112 —
400kcmil 256-30695-1403 —
500kcmil 256-30695-339 —
Table 20 Recommended lug sizes (Compression Type) M12, 1/2" bolt
Cable Size
T&B Copper
Two-Hole
T&B Aluminum
Two-Hole
#6AWG
256-030695-
868
—
#4AWG
256-030695-
733
—
#2-3AWG 54811BE —
#1AWG 54857BE —
#1/0AWG 256-30695-593 —
#2/0AWG 54862BE 60238
#3/0AWG 54864BE 60244
#4/0AWG 54866BE 60250
250kcmil 54868BE 60256
300kcmil 54870BE 60262
350kcmil 54872BE 60267
400kcmil 54874BE 60269
500kcmil 54876BE 60273
600kcmil 54878BE 60275
700kcmil 54879BE 60277
750kcmil 54880BE 60278
Table 21 Busbar torque for power wiring
Bolt Shaft Size
Torque
Lb-in (Nm)
3/8" (M10) 192 (22)
1/2" (M12) 428 (48)
Table 22 Terminal block torque with compression lugs for control wiring
AWG Wire Size
or Range
Torque
Lb-in (Nm)
#22 - #14
3.5 to 5.3
(0.4 to 0.6)
Table 19 Recommended lug sizes (compression type) M10, 3/8" bolt
Cable Size
T&B Copper
One Hole
T&B Aluminum
One Hole