SMA SB 3800-U - Manual (Page 35)

SB3800U-12:SE2006 SMA America 5-7
Wiring the DC Input
This subsection provides procedures for wiring the DC input from the PV array (via the
DC disconnect enclosure) to the SB3800U. Figure 5-4 shows a simplified wiring
diagram of a PV system.
Figure 5-4 Simplified Electrical Wiring Diagram of a PV System
DC Connection Requirements
WARNING: All electrical installations must be done in
accordance with all local electrical codes and with all local
electrical codes and with the National Electrical Code
(NEC), ANSI/NFPA 70. For installation in Canada the
installations must be done in accordance with applicable
Canadian standards. Use #10AWG (minimum), 90 degC,
copper wire for all DC wiring connections to the Sunny
Boy. Voltage drop an other considerations may dictate
that larger size wires be used.
Note: Use the online SMA string size calculator at
www.sma-america.com to determine the correct string
configuration (see Figure 5-5).
Note: Series fusing may be required depending on the type
of PV module used in the system. See NEC 690.9.
DC-breaker and
combiner box
600 V DC
208 or 240 V AC
60 Hz System
via Approved
Disconnect
Störung
Failure
Betrieb
Operation
Erdschluss
Earth Fault