Filter
Top Products
Specifications and Technical Data
88
11.0 SPECIFICATIONS AND TECHNICAL DATA
11.1 Lug Size and Torque Requirements
Use commercially available solderless lugs for the wire size required for your application. Refer to
Table 24. Connect wire to the lug using tools and procedures specified by the lug manufacturer.
11.2 Cable Lengths: Floor to Connection Point Inside UPS
To help calculate the total cable length required, refer to Table 26 for the distance from the floor to
selected connection points inside the Liebert NX. Determine the cable length required to reach the
Table 24 Torque specifications
Nut and Bolt CombinationS
Bolt Shaft Size
Grade 2 Standard
Electrical Connections
with Belleville Washers
Lb-in N-m Lb-in N-m
1/4 53 6.0 46 5.2
5/16 107 12 60 6.8
3/8 192 22 95 11
1/2 428 22 256 29
Circuit Breakers With Compression Lugs (For Power Wiring)
Wire Size or Range Lb-in N-m
#6 - #4 100 11
#3 - #1 125 14
1/0 - 2/0 150 17
3/0 - 200 MCM 200 23
250 - 400 MCM 250 28
500 - 700 MCM 300 34
Circuit Breakers With Compression Lugs (For Power Wiring)
Current Rating Lb-in N-m
400 - 1200 Amps 300.00 34.00
Terminal Block Compression Lugs (For Control Wiring)
AWG Wire Size or Range Lb-in N-m
#22 -#14 3.5 to 5.3 0.4 to 0.6
NOTE: Use the values in this table unless the equipment is labeled with a different torque value.
Table 25 Battery torque rating
Battery
Initial Torque
in-lb (N-m)
UPS12-100MR 40 (4.5)
UPS12-150MR 25 (2.8)
UPS12-210MR 25 (2.8)
UPS12-300MR 110 (12.4)
UPS12-350MR 110 (12.4)
UPS12-400MR 110 (12.4)