SMA America, LLC
Electrical Connection
Installation Guide
SB50US-80US-eng-IUS112633
35
AC Grounding
PV Grounding
The grounding conductor in the framework of the PV array must be connected to the PV grounding
conductor and the DC grounding conductor (see section 4.2 ”Locating Internal Component Parts”
(page 19)). The cross section of the grounding conductor corresponds to the cross-section of the
largest conductor in the DC system.
DC Grounding Conductor
A DC grounding conductor may be required by the Authority Having Jurisdiction (AHJ). Use the
terminal block for the PV grounding conductor and DC grounding conductor (see section
4.2 ”Locating Internal Component Parts” (page 19)).
Electrical Installations
All electrical installations must be carried out according to the applicable electrical
standards on site and the
National Electrical Code
ANSI/NFPA 70. Installations in
Canada must be carried out according to the applicable Canadian standards.
Before connecting the Sunny Boy to the power distribution grid, contact your local electric
utility company. This connection must be made only by qualified personnel.
Inverters that are equipped with a fixed AC output:
The circuits of the AC input and the AC output are isolated from the enclosure. The installer
is responsible for grounding the plant according to Section 250 of the
National Electrical
Code
ANSI/NFPA 70.
Grounding a PV plant is performed according to the instructions in Sections 690.41 to
690.47 of the National Electrical Code ANSI/NFPA 70 and is the responsibility of the
installer. Installation in Canada must be carried out according to the applicable Canadian
standards.
The AC output and the neutral conductor are not bonded to ground (PE).
The Sunny Boy must be connected to the AC ground terminal of the power distribution grid
via the ground terminal (PE) (see section 4.2 ”Locating Internal Component Parts”
(page 19)).
