Ac Wiring With Sma Dc-Disconnect - SMA Sunny Boy 3000US Installation Manual

Wiring the Sunny Boy

AC Wiring With SMA DC-Disconnect

Use the following procedure to connect the AC wires to the Sunny Boy with the SMA
DC-Disconnect:
1. Turn OFF the main breaker in the main utility breaker box.
2. Remove interior breaker panel cover.
3. If you are replacing an existing inverter, disconnect the wires for the AC line
you are working with in the breaker box.
4. Install a 3/4-inch conduit fitting in the SMA DC-Disconnect AC wiring knockout
(the knockout on the right side of the SMA DC-Disconnect). Fasten the conduit
fitting on the inside of the SMA DC-Disconnect with the appropriate locknut.
5. Install 3/4-inch conduit between the main breaker box and the SMA DC-
Disconnect's AC wiring knockout.
6. Pull the AC wires through the conduit from the interior of the breaker box to the
interior of the SMA DC-Disconnect.
Note: Refer to Figure 5-5 on page 5-13 for steps 7 through
13.
CAUTION: Avoid using wire nuts to join any wires together
or to make any connections anywhere in the PV system. Wire
nuts are a frequent cause of unreliable, resistive connections,
and ground faults.
7. Connect the AC equipment-ground wire to the PE terminal labeled
in the SMA DC-Disconnect.
8. Connect the L1 (AC line 1or HOT) wire to the terminal labeled L1 in the SMA
DC-Disconnect.
9. Connect the L2 (AC line 2) wire to the terminal labeled L2 in the SMA DC-
Disconnect.
5-12
WARNING: You must connect the wires that carry
the AC voltage from the Sunny Boy to the utility grid
in the order described in this procedure. Deviating
from this procedure could expose you to lethal volt-
ages that can cause serious injury and/or death.
SMA America
Wiring the AC Output
SB3000US-4000US-11-SE1607