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4G5: DC Power & Breaker Panels - General
There are two panels on the boat that control the DC power
distribution to the DC equipment. One is the "Main Panel"; the other is
the "Electronics Panel" (it is a panel with breakers above the lower
helm).
These panels form the nerve center of the DC system. On
them are the switches that control power to the boat's various systems.
Just as in your home, most of these switches are
true "circuit breakers": they feed power to somewhere
aboard where there is another switch which, in turn,
turns the item on and off. An example would be the
circuit breakers for the horn and electric head. If the
breaker is "on", the horn won't work unless you push the
horn button, and the head won't start flushing the
moment you turn the breaker on, either!
But some of the other breakers also serve as the
switch for the item. An example of this would be the
navigation light breaker or the macerator pump breaker.
On the next page is the list of switches and how
they're used:
Key to codes
"B"
= "Breaker"
"S"
= "Switch and Breaker"
"WL"
= "Warning Light")
"MS"
= "Momentary Switch"
Green
= Leave on Always
Blue
= Leave on when using boat (i.e., cruising)
Yellow = Use when Item is Needed
Red
= Use with Caution in Exceptional Circumstances
Section 4F: Electrical Systems, DC 4.18
The electronics breaker panel.
The DC main electrical panel
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