Wiring the Sunny Boy Wiring the AC Output
SB3000US-4000US-11-SE1607 SMA America 5-7
Wiring the AC Output
This subsection provides complete, step-by-step procedures for wiring the AC output
from the Sunny Boy to the utility grid.
AC Connection Requirements
WARNING: All electrical installations must be done
in accordance with all local electrical codes and
with the National Electrical Code (NEC), ANSI/
NFPA 70. Use #6 AWG (maximum), 90 °C (194
°F), copper wire for all AC wiring connections to the
Sunny Boy. Voltage drop and other considerations
may dictate that larger size wires be used. Use only
solid or stranded wire but not fine stranded wire.
WARNING: The National Electrical Code (NEC)
states that the inverter must be connected to a ded-
icated circuit, and that no other outlets or devices
can be connected to the same circuit. See NEC Sec-
tion 690-64(b)(1). The NEC also imposes limitations
on the size of the inverter and the manner in which
it is connected to the utility grid. See NEC Section
690-64(b)(2).
WARNING: To reduce the risk of fire, connect only
to a circuit provided with the required branch circuit
overcurrent device sized in accordance with the Na-
tional Electrical Code, ANSI/NFPA 70. The maxium
size overcurrent device shall not be more than 30
amperes.
The following diagrams show the potential losses in AC wires with respect to the
cross-sectional area of the cable and the length of the cable. Use the following
diagrams to determine the best wire size to use for your particular installation.
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