Electrical connection
SMA America, LLC
22
SBCBTLUS-IUS094510
Installation Guide
6.3 Connecting equipment ground
The PV system grounding must be installed in accordance with the requirements of sections 690.43
through 690.47 of the
National Electrical Code
®
, ANSI/NFPA 70. In Canada, wiring methods shall
be in accordance to the Canadian Electrical Code Part II.
The installer bears the responsibility for correct installation.
Use only 194 °F (90 °C) rated copper wire for wiring connections to the Sunny Boy Combiner Box.
The grounding terminal block (A) is located at the bottom
right corner of the Sunny Boy Combiner Box. Following
components may be connected to the grounding
terminals:
• AC equipment-grounding
• DC equipment-grounding
1 terminal of the block remains unused.
Consider the required cable sizes and torques. Refer to 11.1 ”Cable requirements” (page 33).
1. Strip the cable by approx. 0.3 in. (8 mm).
2. Open the screw terminals completely by turning
them counterclockwise with a flat-head screwdriver.
3. Plug the stripped cable into the screw terminal.
4. Tighten the screw terminal clockwise.
☑ The components are grounded.
DANGER
Risk of electric shock when touching the DC cable attached to the PV module.
Death or serious injuries will result.
Voltage is present in PV modules exposed to light.
• Cover the PV modules with opaque material during installation and maintenance.
• Follow all safety precautions of the module manufacturer.
NOTICE
Danger of fire
The cable cross-section of the equipment grounding must not be smaller than the one of
Combined-Out.
