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4300 Series Ancillary Cabinets Installation and Operation Manual
10.7 Join the 431A Cabinet with the 431M
The Toshiba Auxiliary Cabinet (431A) is equipped with four 14 mm mating holes located on the front and
back of the left and right sides of the cabinet.
1. Remove the top and bottom 431A Front panels.
2. Remove the cable access plate at the lower-front right side of the 431A Cabinet. (See Figure 10-7)
3. Remove the cable access plate at the lower-front left side of the 431M Cabinet.
4. Position the 431A cabinet to the left of and adjacent to the 431M Cabinet.
5. Align the four 14 mm bolt holes on the right side of the 431A Cabinet with the matching four 14 mm bolt
holes on the left side of the 431M Cabinet.
6. Bolt the cabinets together with four 3/8-16 in. x 2 in. long bolts.
7. Select the power cables per Table 10.3.
• Cable size for the UTILITY and LOAD terminals are dependant on the Input/Output Voltages to the
transformers.
• The UPS Input/Output cables will be the same size: 3Phase /4Wire 208/120V.
8. Run the power cables from 431M power terminals TB1 to 431A power terminals TB1 per Figure 10-8.
9. Run the appropriately sized power cables from 431A TB2 to the Utility and Load per Figure 10-8.
Figure 10.7 - 431A Cable
Access Plate
Figure 10-8 - Power Cabling Between Auxiliary Cabinet, MBS, and UPS
1
431A
Utility Power
L1
L2
L3
N
(Optional)
Critical Load
N
L1
L2
L3
(Optional)
TB1
(To UPS IN)
(From Utility)
TB2
(From UPS OUT)
(To LOAD)
H1 H2 H3 N N L1 L2 L3
H1 H2 H3 N N L1 L2 L3
431M
NEUTRAL
N N N N
UPS OUT UPS IN
A
B
C
A
B
C
UTILITY
IN
LOAD IN
A
B
C
A
B
C
4300 Series
UPS
TB1
H1
H2
H3
N
N
L1
L2
L3
(UPS OUT) (UPS IN)
+
-