5-5
Battery Systems
Section 5
Grounding and Bonding
Definitions
The terms grounding and bonding are often incorrectly
used interchangeably. They are different systems that
can work together to provide solutions to common
problems and risks on the water.
Bonding is the process of connecting various metal
components in the boat to a common electrical con-
tact. This helps to reduce the chance of rails and
other metal objects carrying dangerous electrical
charges.
Grounding is defined as the method in which any elec-
trical potential is connected to the surrounding water
for the purpose of energy dissipation.
Properly designed grounding and bonding systems
incorporating zinc or aluminum anodes and bronze
plates will also help control corrosion of aluminum and
stainless steel parts.
Grounding
The negative terminals of all house and starting batter-
ies, and the negative battery cables from the outboard
engines, are connected together at the negative buss
bars located inside the control console. These nega-
tive buss bars serve as the return point for the entire
12 VDC electrical system.
The accessory fuse block and negative terminal strip
on the electronics distribution panel also connect to
the negative side of the 12 VDC electrical system at
the buss bars. The connections are made with #8 awg
black wires from each device.
Note: All grounding wires and cables are
black
.
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