Connecting Ground - SMA SUNNY CENTRAL STRING-MONITOR US Technical Description

Electrical Connection
Position Description
B Negative grounding: Screw terminals for DC+ of the PV generator
Positive grounding: Screw terminals for DC– of the PV generator
Use 90 °C (194 °F) copper wire for all DC wiring connections to the fuse holders.
C Negative grounding: Screw terminals for DC– of the PV generator
Positive grounding: Screw terminals for DC+ of the PV generator
D Screw terminals for grounding the PV generator
E Terminal for grounding the DC cable of the Sunny Central
F Negative grounding: Terminal for DC+ of the Sunny Central
Positive grounding: Terminal for DC– of the Sunny Central
G Negative grounding: Terminal for DC– of the Sunny Central
Positive grounding: Terminal for DC+ of the Sunny Central
7.2 Connecting ground
The PV modules may not be connected until the communication cables have been connected (see
section 6 "Communication connector" (page 29)).
The Photovoltaic System Grounding shall be installed per the requirements of sections 690.41
through 690.47 of the National Electrical Code, ANSI/NFPA 70 and is the responsibility of the
installer. In Canada, wiring methods shall be per the Canadian Electrical Code Part II.
Use 90 °C (194 °F), copper wire for all wiring connections to the Sunny Central String-Monitor.
DANGER
Risk of electric shock when touching the DC cable attached to the PV module.
Death or serious injuries.
Voltage is present in PV modules exposed to light.
• Cover the PV modules.
• Follow all safety precautions of the module manufacturer.
38 SSMUS-TUS094511
SMA Solar Technology AG
Technical Description