12 | Installation
3 INSTALLATION
The heavy gauge cables on the BCDC1212T unit carry peak currents of up to 12 Amps, and it is
important to make good, low resistance, electrical connections that will not degrade over time.
Failure to make a good, reliable contact may result in breakdown of the cable insulation and
cause a short circuit, or worst case a fire. We recommend that this activity be undertaken by an
appropriately qualified or experienced person.
3.1 AUXILIARY BATTERY CONNECTION — BROWN CABLE
The BCDC1212T BROWN cable is fitted with an M5 lug respectively for ease of installation. It is
recommended that the BCDC1212T be installed as close as possible to the auxiliary battery to
minimise cable length and associated voltage drop.
Ideally the BROWN cable should be connected to the fuse on the auxiliary battery without adding
additional length to the brown cable (see Section 2.2 (page 11)).
Figure 6: Connecting the BROWN cable
Auxiliary Battery Input
Connect the BROWN cable to the positive
terminal of the battery.
3.2 COMMON GROUND CONNECTION — BLACK CABLE
The BCDC1212T BLACK cable is fitted with an M8 lug and should be connected to a good quality
ground.
It is important that all the ground connections of the start battery, auxiliary battery, between the tow
vehicle and trailer, and the BCDC1212T be high quality, have a low impedance between them and
be corrosion free.
Figure 7: Connecting the BLACK cable
Common Ground
Connect the BLACK cable to a ground point that
is common with the Start and Auxiliary battery.
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