Xantrex Technology C40 - Manual (Page 62)

Installation
42 975-0004-01-02 Rev D
Long-distance wire runs
If there is a significant distance between the PV array and the
controller and/or the controller and the battery, larger wires
can be used to reduce the voltage drop and improve
performance. Refer to
Table 2-4 .
To use a larger size wire, use a splicer block (terminal block)
intended for this purpose. This allows the larger cable size
from the batteries to be “spliced” to the smaller wire size
connected to the controller. Split-bolt kerneys can also be
used for wire splices.
Follow manufactures recommendations for torque and
mounting (if required). Splicer blocks and split-bolt kerneys
are available from renewable energy suppliers.
Maximum One-way Distance and Wire Size
Refer to Table 2-4 and find your maximum current in the left
column, and the one-way distance from your power source
(feet/meters) to the
C-Series controller (or the distance from
the C-Series controller to your load) on the same line, then
read the wire size required at the top of the column.
Important: NEC Article 690 and local electrical codes should
be consulted for wire sizing and any additional installation
requirements.
•
For a C60 use a 60 amp, 100% Continuous Duty breaker and
#6 AWG, 90 °C wire.
• Larger wire sizes may be used to improve performance, but
are NOT approved by UL to be installed in the controller. Use
a splicer block as previously described.