SAG582140600
System Application Guide
Revision E, November 15, 2018
Spec. No. 582140600 (Model 8100
DB
)
Page 54 of 67
DC Input Connections
General
DC input cable size varies depending on power requirements, therefore no specific information is provided for cable size.
Refer to Table 18 for recommended cable sizes and lugs at rated maximum bay load (640 A per distribution panel, 1800 A per
side 6-panel bay, 2400 A per side 8-panel bay). Note that loads typically should not exceed 80% of capacity; therefore, input
cables have been sized for an overcurrent protection device rated at 800 A. All lugs for customer connections must be
ordered separately. Customer needs to supply lug mounting bolts and hardware
.
Maximum size of wire to be connected to a single lug position and maximum lug width are as shown in Figure 17.
DC input (-48V) leads terminated in the appropriate lug are connected to the List 43 bay input feed and shunt assembly. See
Figure 17. When making connections, observe correct polarity.
DC input return leads terminated in the appropriate lug are connected to the optional internal ground/return bars or to
optional external ground/return bars. See Figure 17. When making connections, observe correct polarity.
External
Overcurrent
Protection Device
Rating
Ambient
Operating
Temperature
(1)
Loop
Length (Ft)
1.0 Voltage
Drop
(2)
Loop
Length (Ft)
0.25 Voltage
Drop
(2)
Recm 90
°
C
Wire Size
(AWG)
(1)
Recommended
Crimp Lug
(3)
800 A
40 °C
84.5
21.1
750 kcmil
245348100
168.9
42.2
(2) 750 kcmil
1
Wire sizes based on recommendations of the American National Standards Institute (ANSI) approved National
Fire Protection Association's (NFPA) National Electrical Code (NEC). Table 310.15 (B) (16) for copper wire at 90
°C conductor temperature. For operation in countries where the NEC is not recognized, follow applicable codes.
2
Recommended wire sizes are sufficient to restrict voltage drop to the voltage shown in the column heading, or
less, at rated full load output current of the system for the loop lengths shown in this column. Loop length is the
sum of the lengths of the positive and negative leads.
3
Two-hole lug, 3/8 bolt clearance hole, 1" centers. Lugs should be crimped per lug manufacturer’s specifications.
Table 18
Recommended DC Input Wire Size and Lug Selection
