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26 Wiring Inspection
10.0 WIRING INSPECTION
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)
CableSizeorRange 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.