SMA SC 500HE-US Installation - Manual (Page 60)

8 Electrical Connection SMA America, LLC
60 SC500HEUS-IA-US_en-14 Installation Manual
1. Strip the cable by about 1
1
⁄
5
in. (30 mm).
2. Open the set screw of the terminal completely.
3. Plug the copper or aluminum conductor of the cable into the screw terminal and tighten it with
the specified torque.
4. If necessary, tighten the screw terminal to the busbar again using a torque wrench with a torque
of 27 ft.-lbs. (37 Nm).
8.5.2 Connecting DC cables with cable lugs
B Spring washer
C Washer
D Cable lug
E Busbar
F Screw head ‒ size: M12
%"/(&3
Voltage is present in PV modules exposed to light.
Death resulting from electric shock.
• Cover the PV modules.
• Switch off the fuses in the DC distribution boxes (e.g. Sunny Central String-Monitor) and
secure them against reconnection.
• Follow all safety precautions of the module manufacturer.
%"/(&3
Normally grounded conductors may be ungrounded and energized when a ground-fault is
indicated.
Risk of electric shock.
• Test before touching.
• Work on the Disconnect Unit must be carried out by qualified personnel.
Position Description