SMA SB 5000-US - Manual (Page 37)

SMA America, LLC Electrical Connection
SB50US-80US-IA-en-37 SB50US-80US-IA-en-37 37
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 20)). The cross-section of the grounding conductor corresponds to the cross-section of the
largest conductor in the DC system.
The PV array is operated in a grounded configuration. The grounding of a PV plant is established as
per the specifications of Section 690.41 to 690.47 of the National Electrical Code ANSI/NFPA 70
and is the responsibility of the electrically qualified person. Installations in Canada must be carried
out in accordance with the applicable Canadian standards.
DC Grounding Conductor
A DC grounding conductor may be required by the Authority Having Jurisdiction (AHJ). Use the
connecting terminal plate for the PV grounding conductor and DC grounding conductor (see section
4.2 ”Locating Internal Component Parts” (page 20)).
6.1 Connection Area of the Sunny Boy
The DC input of the PV array and the output of the AC power distribution grid are connected inside
the enclosure. The internal AC and DC connecting terminal plates are designed for a maximum size
of 6 AWG. Suitable enclosure openings are on the underside of the Sunny Boy.
The AC outputs and the neutral conductors are not connected with PE
The circuits of the AC input and the AC output are isolated from the enclosure. The
electrically qualified person is responsible for grounding the plant according to Section
250 of the National Electrical Code ANSI/NFPA 70.
The Sunny Boy must be connected to the AC grounding conductor of the power distribution
grid via the ground terminal (PE) (see section 4.2 ”Locating Internal Component Parts”
(page 20)).
Position Description
A
1
⁄
2
in. screws for communication cable with filler-plugs
B
3
⁄
4
in. DC opening with double membrane adapter
C
3
⁄
4
in. AC opening with double membrane adapter