8
2 INSTALLATION
2.7 Cable sizing
Below is a table outlining the required cable size for a given cable install length.
Always choose a wire diameter equal to or greater than what is specified below.
Part Number Cable Install Length
(m)
Recommended Wire Size
(mm²)
Closest (BAE, B&S, AWG)
LFP1225(LV) 1 - 5 7.71 8
5 - 9 13.56 6
LFP1240(LV) 1 - 5 13.56 6
5 - 9 20.28 4
2.8 Wiring
The heavy gauge wires on the LFP1225(LV) and LFP1240(LV) unit carry peak
currents of up to 35 and 50 Amps respectively, and it is important to make a good,
low resistance, electrical connection that will not degrade over time. Failure to
make a good, reliable contact may result in breakdown of the wire insulation and
cause a short circuit, or worst case a fire. We recommend that this activity be
undertaken by an appropriately trained person.
REDARC recommends using a soldered butt splice crimp connection that is
covered with heatshrink. See Figure 2.1. REDARC does not recommend using
standard red/ blue/yellow blade connections as they are not rated for either the
current required or gauge of wire supplied on the unit.
Crimping provides good mechanical connection, soldering provides a long lasting
electrical connection and forming of the heatshrink will prevent any shorting/
contact with your vehicle chassis.
Figure 2.1 - Ensuring a good wiring connection
Crimp here.
Crimp both wires to the butt splice using
indent type crimpers.
Solder here.
Solder the wires to the butt splice.
Ensure that a good connection is
made. Keep heatshrink away until after
soldering is complete and has cooled.
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