Mainship 40 Trawler Single - Power System Components and Distribution

M
ainship 40 Trawler Sin
g
le & Twin • DC Electric S
y
stems
7.
2
D
C Electric S
y
stem
Your boat has a 12 V DC ne
g
ative
g
round and a 120V
H
z
(
Hertz
)
A
C
electrical s
y
stem. Your electrical s
y
stem
was thorou
g
hl
y
inspected at the factor
y
before
y
our boat
was delivered to
y
our dealer. The DC Electric S
y
stem
c
onsistso
f
the
f
ollowin
g
s
y
stems or components
:
Batter
y
Switches
DC
Distribution Panel
He
lm
Co
ntr
o
l
s
Ba
tt
e
r
ies
Batter
y
C
har
g
er
P
umps
Ligh
t
i
n
g
CO
Monitors
W
aste S
y
stems
En
g
ine Controls
Bil
g
e Blowers
A
ppliances
Wi
n
dlass
Trim T
abs
G
au
g
es
7.1 DC Power S
y
stem & Components
T
o operate the 12V DC S
y
stem
1. Switch the main batter
y
switch in the en
g
ine com-
p
artmrnt to
O
N.
2.
S
wit
c
h th
e
D
C
MAIN
c
ir
cu
it
b
r
ea
k
e
r
a
t th
e
D
C
D
istribution Panel to
O
N.
N
ote: Alwa
y
s switch circuit breakers off when
y
ou leave
y
our
b
oat unatten
d
e
d.
7.1.1 Batter
y
Switche
s
Each batter
y
bank is wired to a batter
y
selector switch
(
Fi
g
. 7.1
)
located on the en
g
ine room aft bulkhead. The
batter
y
switch controls the deliver
y
of DC power from
the batteries to the en
g
ine and all components usin
g
D
C
po
w
er.
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Off position
On position
Fi
g
ure 7.1 Batter
y
Switch
7.1.2 Batter
y
Switch Panel
The batter
y
switch panel supplies power to all the ma
j
or
s
y
stems of
y
our boat, as well as controllin
g
power to the
"
constant hot" s
y
stems. These are s
y
stems that need o
r
have power supplied to them whether the batter
y
switch
i
s
o
n
o
r
o
ff
.
Note: For safety and convenience the following items are not
shut off by the battery switches:
Bilg
e
P
umps
S
ump Pum
p
CO
Monitor
S
tereo Memor
y
En
g
in
e
These items need constant power to perform their task.
This allows the bil
g
e pumps to operate an
y
time excess
f
luid accumulates in the bil
g
e. The remainin
g
D
C
s
y
stem
is turned off with batter
y
switches.
Fi
g
ure 7.2 Batter
y
Switch Panel
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•
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