Power / ground – Precision Power PC4200 User Manual

Page 8

Grounding

Locate an area near the amplifier(s) that is metal and clean an area
about the size of a quarter to bare metal. Inspect the area around
and underneath to be sure you won't drill into wires, brake or fuel lines.
Drill a pilot hole in the middle of this area. Terminate the ground wire
with a ring connector and attach it to the bare metal using a #8 sheet
metal screw and washer or preferably, a bolt, nut and a star washer
(not supplied). We suggest crimping and soldering this connection.
After the connection is complete, coat the area (on both sides) with
silicone or some similar material to prevent rust from developing on
the bare metal.

If your grand total current draw is over 50 amps (or total output
power is over 300 watts), you should run a ground wire beside
your power wire from the battery to the amplifier(s) in addition
to your regular ground wire. Keep the ground and power wires
as close together as possible, and use the same gauge wire for both.
This will ensure that you have a good ground path, and may eliminate
such potential problems as engine noise and overheated amplifiers.

Charging System Considerations

If your grand total current draw is over 100 amps (or total output
power is over 600 watts), you are probably exceeding the capability
of your charging system. Dimming lights and fluctuating voltage are
solid indicators that you need to upgrade your alternator, battery
(or go to multiple batteries), or both.
Keep in mind that your amplifiers simply convert electrical energy
to acoustical energy, and any electrical deficiency will compromise
the performance of your sound system.
For more information about charging system upgrades, see your
local authorized

PrecisionPower Dealer or call the PrecisionPower

technical support office at

1-800-62POWER.

POWER / GROUND