SMA America, LLC
Technical Data
Installation Guide
SBCBTLUS-IUS094510
33
11.1 Cable requirements
Use only 194 °F (90 °C) copper wire for all DC wiring connections to the screw terminals between
• PV modules and Sunny Boy Combiner Box
• Sunny Boy Combiner Box and Sunny Boy
Connection - Sunny Boy Combiner Box
The conductor cross-section must be adjusted to the maximum current.
*The listed terminals are rated to a temperature of +221 °F (+105 °C).
Terminal
Torque
Wire Size
String Inputs*
15 in-lbs. (1.7 Nm)
14 AWG … 6 AWG (2.5 mm² … 16 mm²)
Combined Out*
40 in-lbs. (4.5 Nm)
6 AWG … 2 AWG (16 mm² … 35 mm²)
Equipment grounding*
40 in-lbs. (4.5 Nm)
8 AWG … 2 AWG (10 mm² … 35 mm²)
