SMA SC 500U Installation - Manual (Page 54)

SMA Solar Technology AG
54 SC500U-IUS093411 Installation Guide
☑ The AC cables are now connected.
13. Connect phase B to the terminal marked "B". Tighten
the screw terminal using an Allen key. The required
torque is 42 ft-lbs (57 Nm).
14. Connect phase C to the terminal marked "C". Tighten
the screw terminal using an Allen key. The required
torque is 42 ft-lbs (57 Nm).
15. For 480 Delta:277 WYE connect cable N to the
terminal marked "N" . Tighten the screw terminal
using an Allen key. The required torque is 42 ft-lbs
(57 Nm).
or
For 480 Delta do NOT connect a neutral cable. In
this case, rail N is not used.