SMA America, LLC Electrical connection
Installation Guide SB30-40US-IUS103030 53
Positive grounding
1. Verify that your inverter is grounded as intended. Refer to section 6.7.2”DC input grounding”
(page48).
4. Torque all wires in the terminal blocks inside the SMA DC Disconnect to 15 in-lbs. (1.7 Nm).
2. Connect the negative DC wires to the terminal labeled PV
UNGROUNDED in the SMA DC Disconnect.
3. Connect the positive DC wires to the terminal labeled PV
GROUNDED in the SMA DC Disconnect.
5. Use a screwdriver in order to poke a hole in the groove
of the grommet.
6. Remove the membrane.
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