Staco Energy FirstLine, User Manual, Page: 20 / 43

FirstLine UPS
Form No. 003-2323 Rev B 16
Table 7-Terminal Block Wiring
UPS
Rating Voltage Input
Transformer
Type
Phase
Conductor
Min/Max Neutral
Conductor
Min/Max Neutral Conductor with
non-linear loads
Min/Max Ground Wire
Min/Max
25kva 208/120 NA #2/2-0 #2/2-0 #2/2-0 #8/1-0
208 isolation #2/2-0 (none) (none) #8/1-0
220/127 NA #2/2-0 #2/2-0 #2/2-0 #8/1-0
480/277 auto #4/2-0 #4/2-0 #4/2-0 #10/1-0
480 isolation #4/2-0 (none) (none) #10/1-0
30kva 208/120 NA #1-0/2-0 #1-0/2-0 #1-0/2-0 #6/1-0
208 isolation #1-0/2-0 (none) (none) #6/1-0
220/127 NA #1-0/2-0 #1-0/2-0 #1-0/2-0 #6/1-0
480/277 auto #4/2-0 #4/2-0 #4/2-0 #10/1-0
480 isolation #4/2-0 (none) (none) #10/1-0
37.5kva 208/120 NA #1-0/2-0 #1-0/2-0 #1-0/2-0 #6/1-0
208 isolation #1-0/2-0 (none) (none) #6/1-0
220/127 NA #1-0/2-0 #1-0/2-0 #1-0/2-0 #6/1-0
480/277 auto #3/2-0 #3/2-0 #3/2-0 #8/1-0
480 isolation #3/2-0 (none) (none) #8/1-0
OUTPUT -Minimum wire size required to support rated load. Smaller wire may be used if rated
load current is not needed and the appropriate circuit protection is applied.
UPS
Rating Voltage
Output
Transformer
Type
Phase
Conductor Neutral
Conductor Neutral Conductor with
non-linear loads
Ground Wire
25 kVA 208/120 NA #2 #2 #2 #8/1-0
220/127 NA #2 #2 #2 #8/1-0
480/277 auto #4 #4 #4 #10/1-0
30 kVA 208/120 NA #1 #1 #1 #6/1-0
220/127 NA #1 #1 #1 #6/1-0
480/277 auto #4 #4 #4 #10/1-0
37.5kVA 208/120 NA #1-0 #1-0 #1-0 #6/1-0
220/127 NA #1-0 #1-0 #1-0 #6/1-0
480/277 auto #4 #4 #4 #8/1-0
Note: No output circuit protection is required if the output conductor sizes are at least as large as
the input conductors, unless the UPS is equipped with an input isolation transformer. If the UPS is
equipped with an input isolation transformer, the UPS is considered a separately derived source
and circuit protection for the output conductors must be provided.
Use at least 75°C-rated copper wire. Minimum wire size is based on 120/208 full load ratings
applied to NEC Code Table 310-16. Code may require a large AWG size than shown in this table
because of temperature, number of conductors in the conduit, or long service runs. Follow local
requirements.