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2 INSTALLATION
IMPORTANT NOTE: Battery type selection refers to a typical installation where the battery and
unit are mounted in a low to mid temperature situation. For situations of higher temperature
such as under the bonnet or in a caravan battery box, a softer profi le (eg Std Lead Acid instead
of Calcium) may need to be selected to avoid damage to the battery.
2.1 Wiring
The wires on the BCDC1220 unit carry higher than 20 Amp, 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 fi re. 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. The process should be to feed the heatshrink over the wires,
crimp the wires into the butt splice, then solder the wires on the butt splice, and
fi nally heat the heatshrink. Do not solder the wire before crimping.
The appropriate sized butt splice should be selected: for example if 8AWG wires
are used to connect the unit then an 8AWG butt splice should be used. If the wire
gauge brought up to the unit is larger than the 8AWG, then it is recommended to
use a butt splice that has two different size entrys, each matching the respective
wire size. Various butt splices are available from auto electrical suppliers.
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.
The term ‘crimping’ refers to a method of fi rmly attaching a terminal or contact
to the end of an electrical conductor by pressure forming or reshaping a metal
barrel onto the connector. The forming of a satisfactory crimp is dependent upon
the correct combination of conductor, crimp barrel and crimping tool. When
the correct combination of equipment is employed, a crimp that has both good
electrical and mechanical characteristics will be formed.
Butt splices are used to dress and terminate multiple conductors of the same or
different gauges in an end-to-end or series confi guration.
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