6 Electrical Connection
Electrical installations
All electrical installations must be carried out in accordance with the applicable electrical
standards on site and the National Electrical Code
• Before connecting the inverter to the utility grid, contact your local grid operator. The
electrical connection of the inverter must be carried out by qualified persons only.
• Ensure that no cables used for electrical connection are damaged.
6.2
Overview of the Connection Area
A
B
C
D
Figure 6: Connection areas of the inverters' AC Connection Unit and DC Connection Unit
Position
A
B
C
D
E
F
G
H
I
24
STP50-US-40-IA-en_es-11
A
B
C
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D
E
F
F
E
Designation
Slots for AC surge protection devices
Terminal blocks for AC connection
Bridge between N and enclosure
Equipment grounding terminal for the equipment grounding conductor of
the utility grid
Enclosure opening for AC connection (for 50.8 mm (2 in) trade size con-
duits)
Enclosure opening for the connection of an additional conductor (for
27 mm (1 in) trade size conduits)
Cable glands for network cables and, if needed, for the connection ca-
bles of the Antenna Extension Kit or other data cables
Positive and negative connectors for DC connection
Equipment grounding terminal for the equipment grounding conductors of
the PV array
SMA Solar Technology America LLC
®
ANSI/NFPA 70.
G
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+
_
H
I
K
J
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Installation Manual