Kenworth K270, Body Builder'S Manual

Page: 58 / 96

7-1
ELECTRICAL
Introduction
Electrical wiring can sometimes be very frustrating. This is especially true when adding circuits to an existing setup.
Through the use of an optional body harness and additional spare circuits, we have tried to reduce the complexity as-
sociated with adding common circuits to a body installation.
Note:
The most common circuits that body builders may need are pre-connected to this optional wiring
harness.
The new body related circuits can be added by connecting the added circuit wires to the appropriate wires in this harness.
ELECTRICAL CIRCUITS
Capacity
WARNING!
Do not install an electrical circuit that requires more amperage (electrical capacity) than what is
available in the
specific chassis circuit. An overloaded circuit could cause a fire. Compare the
amperage requirements of the new circuit to the electrical current capacity of the existing
chassis circuit before adding the body or other equipment.
When adding an electrical circuit, you must know the current capacity (amperes) of each circuit.
The capacity of the existing system in the chassis must be enough to power the additional circuit. The new circuit will require a
certain amount of power to operate; so, the existing (battery or alternator) power source must have the capacity to provide addi-
tional power or the new circuit will not function properly.
Check the current (ampere) demand of the circuit to be added. Compare it to the current capacity of the circuit you are connecting
into. The current carrying capacity of the wires, controls, switches, and circuit breakers that provide current to the circuit must be
equal to or greater than the demand of the added circuit otherwise these components may not work properly. See Table 7–1.1 and
for relevant circuit information.
Section 7
Electrical