Electrical Connection
SMA America, LLC
42
SI5048U-TUS121440
Technical Description
Connecting the grounding conductor
1. Install a conduit with a diameter of 1
1
/
2
in. (38.1 mm) at the opening in the center of the
Sunny Island. Attach the conduit in the inside of the Sunny Island using the appropriate nut.
2. Pull the cabling through the supply line from the inside of the distribution board into the
enclosure of the Sunny Island.
3. Remove the protective insulation from the groundig conductor.
4. Plug the grounding conductor into the DC connection block for grounding and tighten the screw
to a torque of 50 in.-lbs. (5.7 Nm).
☑ The grounding conductor is connected.
Calculating the cross‑section of a grounding conductor
SMA cannot state generally valid values for the cross‑section of the grounding conductor required for
the external grounding of the battery. The cable dimensions depend on the type and size of the
battery connected, the external fuse (DC side) and the material used in the grounding cable.
Calculating the Required Grounding Conductor Cross‑section According to
Applicable Standards
An exact calculation of the grounding conductor cross‑section must take account of the
regionally applicable standards and guidelines
(e.g
National Electric Code
®
Article 250.122).
