Dc Cable Requirements; Connecting The Dc Cables In The Dc Disconnect - SMA Sunny Boy 6000TL‑US Installation Manual

5 Electrical Connection
5.5.1 DC Cable Requirements
Only use solid wire or stranded wire
• Use the free of charge "Sunny Design" at www.SMA-America.com to design your PV
plant.
DC cabling to the Combiner Box
Use copper wire that is rated for 10 to 6 AWG (6 to 16 mm²) and 194°F (90°C) (National
®
Electrical Code
690.35).
DC cabling Between the Combiner Box and the Inverter
Use copper wire that is rated for min. 8 AWG (10 mm²) and 194°F (90°C) (National Electrical
®
Code 690.35).
5.5.2 Connecting the DC Cables in the DC Disconnect
1. Lay a conduit from the Sunny Boy Combiner Box to the DC Disconnect
(see Section 5.2 "Inserting the Cables in the DC Disconnect", page 31).
2. Open the DC Disconnect as described in Section 8.3 "Opening the DC Disconnect", page 58.
3. Pull the DC cable from the Sunny Boy Combiner Box through the conduit into the DC Disconnect.
Open terminals fully before insertion of the cables.
4. Connect the grounding conductor to terminal (B)
for the grounding conductor.
If necessary:
Connect the grounding cable of the PV frame to
terminal (A) for the grounding conductor.
40 SB6-11TL-US-IA-en-13
SMA America, LLC
Installation Manual