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I am in the process of installing a 36V
propulsion system in my newly built fantail launch. One of
the components is an "Emergency Disconnect Switch"
(Albright 250LB). It is mounted immediately downstream from
the main fuse which is, in turn, wired directly to
the battery bank POS. The switch allows one,
instantaneously, to remove power from the remaining components of
the system.<br><br>Question: Why doesn't the fuse
take care of this or, put another way, under what
emergency circumstances would one throw this
switch?<br><br>Larry

Hi Larry,<br><br>I have worked in a marina for
the last 28 years. I have seen a lot of burnt wiring
systems that did not blow the main fuse. It allows you to
disconnect all power when you leave the boat or are working
on it with out having to unhook the battery cables.
The only thing I would leave "Hot" would be a battery
monitor or bilge pump. These would have their own fuses
located before the Discocnnect Switch. There might be
other times needed, but I can not think of any at this
time.<br><br>Good luck with your project.<br><br>Jim

Hi Larry,<br><br>I have worked in a marina for
the last 28 years. I have seen a lot of burnt wiring
systems that did not blow the main fuse. It allows you to
disconnect all power when you leave the boat or are working
on it with out having to unhook the battery cables.
The only thing I would leave "Hot" would be a battery
monitor or bilge pump. These would have their own fuses
located before the Discocnnect Switch. There might be
other times needed, but I can not think of any at this
time.<br><br>Good luck with your project.<br><br>Jim

Larry - I had an electrical problem when I first
bought my elco (used). After we "fixed" it, we
reconnected the batteries, only to melt down a number of
wires before we could get the fuses disconnected. They
were so hot to touch we burned our hands. I asked why
the fuses didn't blow and was told that they were
designed to function slowly. In this event, so slowly that
we melted a bunch of wires. I still do not know if
the fuses would have ever blown. Paul Preuss