SMA Sunny Central 250U Installation Manual page 52

6 Electrical connection
If necessary, tighten the screw terminal to the busbar again using a torque wrench with a torque of
27 ft‒lbs. (37 Nm).
Connecting AC cables to busbars with cable lugs
B C
A
D
Figure 40: Connection of AC cables to busbar with copper cable lug
Position Description
A Screw head - size: M 12
B Spring washer
C Washer
D Cable lug
E Busbar
F Nut - size: M 12
52 DisconACDC_SCUS-IUS103110
E
C B
F
SMA America, LLC
A
B C
C
B
F
Installation Guide