Fronius Symo 12.0-3 208-240 - Connecting the Inverter to the Public Grid (AC); Safety; Permitted Cables

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Connecting the inverter to the public grid (AC)
Safety
Permitted Cables AC cables with the following design can be connected to the AC terminals of the inverter:
WARNING! An electric shock can be fatal. Inadequately sized electrical compo-
nents can cause serious injury and damage to property.
- All electrical connections must be made in accordance with the National
Electrical Code, ANSI/NFPA 70, and any other regulations applicable to the
installation site.
- Installations in Canada must be carried out in accordance with applicable Ca-
nadian standards.
- Use min.194°F (90°C) copper wire for all grounding wires (see NEC table
250.122).
- Voltage drop and other considerations may mean larger cable cross sections
need to be used.
- Use only solid or stranded wire. Do not use fine stranded wire.
CAUTION! Danger of damaging the inverter due to improperly connected termi-
nals. Improperly connected terminals can cause thermal damage to the inverter
and may cause a fire. When connecting the AC and DC cables, make sure that
all terminals are tightened securely using the proper torque.
NOTE! When connecting aluminum cables:
- follow all national and international guidelines regarding the connection of
aluminum cables
- follow the instructions of the cable manufacturer
- perform an annual check to ensure that the cables are firmly attached ac-
cording to the proper torque.
NOTE! Form a min. 4 in. cable loop with all cables.
NOTE!
- Make sure that the grid neutral conductor is grounded. For insulated net-
works (without grounding), this is not the case, and operation of the inverter
is not possible.
- A neutral conductor is required for measurement purposes when operating
the inverter. The neutral conductor must have a current carrying capacity of
at least 1 A.
- Copper (Cu) or aluminum (Al): round, solid
- Copper: round, stranded, up to conductor class 4
Cu / Al Cu
AC & DC = copper cables (Cu)
The following wire combinations can be used for wiring.
Select a sufficiently large cable cross-section based on the actual device output!
AWG
round
AWG
strand
ed
AWG
stranded/round
AWG
round/round
AWG
stranded/stranded
4
2)
6
2)
6/6
4)
6/12
2)
6/14
2)
6/16
3)
8
2)
8
1)
8/10
1)
8/12
1)
8/14
1)
8/12
2)
8/10
2)
8/12
1)
8/14
1)
8/16
3)