31
Figure 28: Conduit installation and wiring routing
Conduit fittings need to be water tight with either a NEMA 4, 4X, 6, or 6X rating insulated type is
preferred.
Once conduit and fittings are installed, route wiring thru conduit and fitting and allow a 6 inch
strain relief service loop within the wiring box compartment.
0.5 inch
4.8.4
PV array string input connections
To ensure maximum protection against hazardous contact voltages
while assembling photovoltaic installations, both the positive and
the negative leads must be strictly isolated electrically from the
protective ground potential (PE). All string fuses must be removed
from wiring box.
DANGER!
DANGER!
6 inches
–
Risk of electric shock and fire. Use only with PV modules with
a maximum system voltage of rating of 600V or Higher.
–
Electric shock hazard. The DC conductors of this photovoltaic
system are ungrounded and may be energized.
–
Electric shock hazard. The DC conductors of this photovoltaic
system are ungrounded but will become intermittently
grounded without indication when the inverter measures
the PV array isolation.
WARNING!
AVERTISSEMENT!
–
Verify all DC conductor voltages and polarities with volt meter
because damage to the inverter could result if incorrect DC
input voltage or polarity is connected. After verification of
correct voltage and polarity, DC fuses can be installed. NOTE:
array V
OC
at extreme cold ambient temperature must be veri
fied by calculation never to exceed 600 VDC.
CAUTION!
PRUDENCE!
