SMA America, LLC
6 Electrical Connection
Installation Manual
SB3-5TLUS22-IA-en-10
39
6.3 AC Connection
6.3.1 Conditions for the AC Connection
Cable requirements:
☐ Wire size L1, L2 and N: 12 AWG to 6 AWG (3.3 mm² to 13.3 mm²)
☐ Wire size equipment grounding conductor: 6 AWG (13.3 mm²)
☐ If the ambient temperature is high or there are several cables in one conduit, the wire size must
be as large as possible.
☐ Stripping length:
1
⁄
2
in. (12 mm)
☐ Comprising copper in the form of solid or stranded wire, not fine-stranded wire
☐ Designed for ambient temperatures of at least +194°F (+90°C).
☐ The lines must be dimensioned in accordance with the local and national directives for the
dimensioning of lines, from which the requirements of the minimum wire size can be derived.
Influencing factors for cable dimensioning are, for example, the nominal AC current, the type of
cable, the routing method, cable bundling, ambient temperature, and maximum desired line
losses.
Additionally required mounting material (not included in the scope of delivery):
☐ 1 listed conduit fitting (
3
⁄
4
in. (19 mm)), for outdoor installation rain-proof or moisture-proof
☐ 1 listed conduit (
3
⁄
4
in. (19 mm))
F
Screw terminals
For the connection of the PV strings (input A+)
G
Screw terminals
For the connection of the PV strings (input B‒)
H
Screw terminals
For the connection of the PV strings (input A‒)
Item
Designation
Explanation
