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jeff cote here with another session of
ask pys
so we've got a fellow boater named john
and john's got a question about
uh if a battery switch is required on a
starting circuit
it's a great question because honestly
most
a lot of us unfortunately are have no
battery switch
between the battery and the starter
solenoid on our boats
and that can be very scary i know we
don't have them in our cars
right there is no battery switch in cars
you know you don't have to
turn the ignition on and then also
before you do that
turn a battery switch on but there's a
big distinction between a car and a boat
first of all if a car catches on fire
you open the door and you walk away
take a safe distance freak out
but you're on land on a boat if you ever
have an electrical fire
leaving your boat is not necessarily
easy you might not have a tender in the
water you might not be at the dock
and even if you go in the water and you
go in your tender you might be very far
away from shore
so preventing electrical fires on a boat
has to be a much higher threshold than a
car
and this is the challenge a lot of
people are saying hey jeff
i don't have a battery switch in my car
therefore
i don't need a battery switch in my boat
but the comparison between a car and a
boat
is they're similar yes both used for
propulsion but they're in a completely
different medium
the water changes everything so
the codes absolutely stipulates that
every single
engine be it a generator even be it
your propulsion your engine has to have
a battery switch that allows you to
isolate the
engine from the battery in the event of
not only an emergency but if you're
going to do maintenance on the boat you
might be
doing anything on the engine and you
want to be able to disconnect power to
the starter solenoid and then turn the
alternator
and you want to make sure that your
engine is not energized greatest way to
do that is turn the battery switch off
the other thing too is you want to
remove any sort of parasitic loads that
your engine might have you turn the
battery switch off when you leave your
boat for a month or two months that's
another reason to do it
the other reason to do it and i get
called out and i about
maybe half a dozen times a year for a
boat fire and the boat fire is stuck
starter
so the starter is actually turning even
though the button
on the panel is not energized right so
the starter got stuck
and now the starter's turning and
turning and turning and you can't stop
it you can't turn the ignition
off you're not pressing the button to
start and as the starter is stuck
starting it does that in overheats and
it causes electrical fire
so the only way to actually stop that
from happening is having
a on off switch and so it's absolutely
essential as a boater to have an on off
switch
for every single engine on your boat and
the other caveat there is the battery
switch should not be installed in the
engine room because if there's an
electrical fire
the chances of a boater going down in
the engine room where they can breathe
can't see anything to find a switch
which they probably don't touch that
often
is probably slim to none is an
understatement
and most people are going to open the
hatch close the hatch and then be like
oh great
yeah battery switch is in the engine
room we're not going there
let's prepare everyone let's go for the
dinghy or let's
get off the boat because there's nothing
we can do to stop this electrical fire
hence why the battery switches and all
these modern boats now are always
accessible
outside of the engine room because if
you have a boat fire and it happens in
the engine room
having the turn off or the battery
switch being in the very place where
you're going to try to avoid
it defeats the purpose so yes battery
switches on starting circuits and
battery switches
located conveniently outside of the
engine room space so that you can turn
that circuit on and off without
jeopardizing your life when there's an
electrical fire
so great question thanks for asking
thank you for watching this pys video if
you've got further questions
ask them down below or go on our website
to fill one of the forms
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and thanks for watching
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