6 Electrical Connection SMA America, LLC
42 SB30-40-US-IA-en-33 Installation Manual
1. Connect the black insulated conductor to screw terminal "L1" (torque: 15 in-lb. (1.7 Nm)).
2. Connect the red insulated conductor to screw terminal "L2" (torque: 15 in-lb. (1.7 Nm)).
3. Connect the white insulated conductor to screw terminal "N" (torque: 15 in-lb. (1.7 Nm)).
4. Connect the green-yellow insulated conductor to screw terminal (torque: 15 in-lb. (1.7 Nm)).
5. Ensure that all screw terminals are correctly cabled and that the cables are securely positioned
in the screw terminals.
6.4 DC Connection
6.4.1 Inserting the DC Cables into the DC Disconnect
Additional required mounting material (not included in the scope of delivery):
☐ 1 rain-tight or water-tight sleeve (
3
⁄
4
in. (19 mm)).
☐ 1 rigid conduit (
3
⁄
4
in. (19 mm)).
Cable requirements:
☐ The DC cables must be designed for ambient temperatures exceeding +194°F (+90°C).
☐ The maximum cable length, which is dependent on the conductor cross-Section, must be
adhered to.
☐ Conductor material: Copper wire
☐ Conductor cross-Section: AWG 10 to 6 AWG (6 mm
2
to 16 mm
2
)
☐ The DC cables must be designed according to the installation requirements applicable on site.
Requirements:
☐ The DC cables connected to the inverter must be protected via a switch-disconnector.
☐ The DC switch-disconnector for the inverter must be designed for at least 600 V and 30 A.
☐ If additional DC switch-disconnectors outside of the inverter are required by the Authority
Having Jurisdiction (AHJ), these must be present.
☐ The grounding of the PV plant must be established as per the specifications of Paragraph
690.41 to 690.47 of the National Electrical Code
®
ANSI/NFPA 70 and is the responsibility
of the installer.
☐ All electrical installations must be carried out in accordance with all electrical standards
applicable on site and the National Electrical Code
®
(NE, ANSI/NFPA 70)
(see National Electrical Code
®
, Paragraph 690-64(b) (1 and 2)).
☐ Installations in Canada must be carried out in accordance with the applicable Canadian
standards.
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