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hello everyone and welcome to

boatingtechtalk.com god it feels good

all right everyone so here we've got a

fellow boater asking us

a question straightforward question very

few words but

my god i was actually concentrating just

before trying to think about my answer

jeff this question from neil what is

stray current corrosion

and what should i do to protect my boat

simple question

well said to the point that's why i'm

answering it by the way

it's easy but the answer is so tough

right so first of all straight current

corrosion

really only for most of us remember all

rules have exceptions but for the most

of us 99

99 what we're concerned about is

the moment we connect our boats to shore

power so straight current corrosion is

not something we're really worried about

when we're actually on the water

somewhere other than a marina but when

we come into marina and we plug into

marina

the other boat beside us is also plugged

into the marina and every boat around us

is plugged in and the one thing we have

in common

is that the ac grounding wire that green

wire that is part of the shore power

cord

is connected to a single point on the

dock

somewhere at the power source now that

it's very possible that some boats have

really bad paths back to ground

for whatever reasons an accident

happened it was badly wired

and that boat it's very possible will

actually come

aboard another boat to go back to shore

and so that's basically one of the

biggest concerns that we all have as

boat owners is that we're actually

all together in a marina and you could

have inadvertently a boater beside you

a good neighbor someone who cares and

loves about their boat as much as you do

that is actually accidentally using your

boat's electrical system

to go back to shore right effectively

all the boats that are in the water are

effectively

part of a cell they're all trying to

equalize each other out

and so what we end up doing when we're

connected to shore power is to either

have

a galvanic isolator or an isolation

transformer to protect our boats from

other boats that might have a mishap on

their boats

only will it happen again at a marina

and it's essential

especially if you value your money and

you have a lot of underwater metals like

the propellers and some propellers are

extremely expensive the propeller shaft

can be extremely expensive

and then all these underwater metals

like through halls

you know your rudders all those things

need to be protected

and if your boat is well protected with

zings but the other boat beside you

isn't

it's very possible that your boat will

and your zincs on your boat will

actually not only protect your boat

but will help protect the other boat as

well so that's a fear that we all have

and it's real

i we get involved in those calls all the

time to do surveys

so the best way to handle that is an

isolation transformer or a galvanic

isolator

great question neil and thanks for

asking

thanks for watching this video also we

appreciate the feedback

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