0 wiring inspection, Table 1, Table 2 – Liebert 600T User Manual
Page 32
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Wiring Inspection
10.0 W
IRING
I
NSPECTION
1. Verify all power connections are tight.
2. Verify all control wire terminations are tight.
3. Verify all power wires and connections have proper spacing between exposed surfaces, phase-to-
phase and phase-to-ground.
4. Verify that all control wires are run in individual, separate, steel conduit.
Table 1
Power Wiring Terminals - Factory Supplied
UPS Module Rating
Connection Type
65 & 80 kVA
Rectifier input is top entry, to lugs in the top of the input circuit breaker. Lugs
will accommodate cabling up to 350MCM. DC link and critical bus output
connections are top entry, to frame-mounted terminal blocks with one 3/8-
16x1 stud per phase or polarity. All units have two access plates in the top
grille assembly. A bottom-entry access plate is also standard, to enable the
installer to pull AC cables through the module to the connections on top.
100-225 kVA
For “SpaceSaver” modules in the 48” frame, rectifier input wiring is
top-entry, directly to lugs on top of their respective circuit breakers.
DC link and critical bus output connection are top entry, to frame-
mounted lugs.
Standard modules with top-and-bottom entry have access plates and
a wireway on the right side of the modules. All power connections are
to bus bars in the wireway
.
Use 75°C copper wire. Select wire size based on the ampacities in Table 310-16 (see Table 3 of this
manual) and associated notes of the National Electrical Code (NFPA 70).
Use commercially available solderless lugs for the wire size required for your application. Connect wire to
the lug using tool and procedure specified by the lug manufacturer.
Table 2
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
48
256
29
Circuit Breakers With Compression Lugs (For Power Wiring)
Cable 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
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
Use the values in this table unless the equipment is labeled with a
different torque value.