SMA SUNNY BOY 4000-US - Without SMA DC Disconnect

Electrical connection SMA America, LLC
40 SB30-40US-IUS103030 Installation Guide
6.6.1 Without 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
in. conduit fitting in the AC wiring knockout of the inverter. Fasten the conduit fitting
on the inside of the Sunny Boy with the appropriate locknut.
5. Install a
3
⁄
4
in. conduit between the main breaker box and the AC wiring knockout of the
inverter.
6. Pull the AC wires through the conduit from the interior of the breaker box to the interior of the
Sunny Boy. Refer to the following figure.
7. Connect the AC equipment-ground wire to the PE terminal labeled in the Sunny Boy.
8. Connect the L1 (AC line 1 or UNGROUNDED) wire to the terminal labeled L1 in the Sunny Boy.
9. Connect the L2 (AC line 2) and N (AC line N) wire to the terminal labeled L2 and N in the
Sunny Boy.
10. Connect the wires to the terminal blocks in the Sunny Boy and tighten them to a torque of
15in‑lbs (1.7 Nm).
11. Verify that all connections are correctly wired and properly torqued. Pull on the cable in order
to make sure that it is sufficiently fixed in the terminal.