Installation requirements 37
Power cable requirements
Select the DC and AC cables according to the local regulations and the following
rules:
• Use cables that are rated for at least 70 °C maximum permissible temperature of
conductor in continuous use.
• Use double-insulated DC cables.
• Use a DC cable that is rated for at least 1,000 V
DC
and which is approved for
photovoltaic applications. If the PV system voltage exceeds 1,000 V, select the
DC cable according to the system voltage.
• Use an AC cable that is rated for at least 500 V
AC
.
• The AC cable must have either L1, L2, L3, N and PE or L1, L2, L3 and PE
conductors. Obey the local regulations.
• You can use copper and aluminium AC cables.
• Dimension the AC cables to carry the inverter load current with a maximum
voltage drop of 1% between the inverter and the AC distribution board.
• Connect the PE conductor primarily to the AC connector.
• The minimum permitted PE conductor cross-sectional area is 10 mm
2
for a
copper (Cu) conductor. If the cable has a smaller PE conductor, connect an
additional PE conductor of at least 6 mm
2
with a cable lug to the auxiliary PE
terminal of the inverter.
• (-SX model) Use Phoenix Contact SUNCLIX PV quick connectors:
DC+: PV-CF-S (1774674)
DC-: PV-CM-S (1774687)
Recommended AC output cable types
The outer diameter of the AC output cable must be 22…32 mm (0.9…1.2 in.).
With the supplied reducer seal for the cable gland, the outer diameter can be
14...26 mm (0.6…1.0 in.).
Maximum recommended AC cable lengths
per nominal output power
(based on 1% maximum AC cable losses)
Conductor (Cu)
cross-section
33,000 W
48 A
rms
mm
2
AWG m ft
1072375
16536118
25 3 57 187
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