Wiring Notes - Earth
As you’d expect the DB1.8 uses some serious power. You need to use 2x4AWG inputs for
the power and 2x4AWG inputs for the earth. Keep the earth short (aim for <12 inch), and
use separate bolts (NOT self tappers!) down to the bare metal of the chassis for the
connections. Tie these off with a decent strain relief and paint over the finished install to
protect the metal and preserve the integrity of the electrical joint. Always meter off the
finished earth job prior to hookup and do not accept anything worse than 0.05 ohms of
resistance in the cables to the floor. You’re aiming for zero really at this level. Also please
take time to check: Car battery to chassis earth. Alternator to chassis earth. Any additional
engine to chassis earth straps. These things are also important when you are about to suck
200A out of the system. The power chain is as strong as the weakest link! Blown circuit
boards caused by resistance in the earth path are NOT covered under warranty.
