Basic
Electrical
Components
Circuit Breakers
Models:
All.
Purpose:
All major boat circuits are protected
from shorting and overload by re-setta-
ble circuit breakers. When an electrical
fault is detected, mechanical switch cir-
cuit breakers will “trip” and automati-
cally interrupt the ow of electricity.
In a circuit breaker, when the electrical
ow exceeds specied design toleranc-
es, the electromagnetic bar snaps and
cuts off further electrical passage. (The
XStar features a complex, digital oper-
ation instead, with the same purpose.)
This can be extremely important in
protecting persons on-board and also
in preventing electrical res.
In a water setting, such as those in
which boats operate, it is especially
important to avoid electrical shocks.
As a result, MasterCraft utilizes GFI,
or Ground Fault Interruption, circuit
breaker boards, except in the XStar.
These are solid-state devices that sense
when there is a ground fault, which of-
ten occurs in instances involving water
penetration.
Circuit breakers are preferred over
fuses in boats for most operations
Page 4-2 2014 MasterCraft Owners Manual •Boat Operations
B O A T O P E R A T I O N S
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