"beaufortnc" wrote in message
oups.com...
Hi,

In my quest for the "perfect" marine electrical connection, I've heard
and read a variety of opinions.

In general, most sources agree on the majority of subjects (tinned
wire/connectors, correct sizing, etc...)

However, when it comes to the subject of whether to solder connections
or not, it seems that there is some disagreement.

Are high quality mechanical connections, made with the proper tool, and
protected with adhesive heat shrink enough?

Some think that it isn't.

Any thoughts?

Thanks,

Mike.


A much debated topic.
I think at one time the mil standard for radios was to crimp the terminal
for mechanical strength AND solder for good electrical connection. For
small wire I just use good quality terminals, tinned wire and a racheting
crimper. Wire should be supported at the terminal end so that it cannot
move but I have to say I don't often do this.
I did a little research before installing my 2/0 cables for my windlass.
I have a book on causes of electrical fires which says solder is subject to
creep, that is, a wire under tension may eventually pull out or loosen to
the point where a poor connection generates enough heat to start a fire. The
book says a proper crimp compresses the wire enough to remove all air spaces
and you need several tons of force to do this with big cables. I ended up
borrowing a industrial grade, compound leverage crimper with 3 foot handles.
These cost about $700 new. I don't think a hammer, or one of those units
you clamp in a vise, is capable of doing a really good job. If that was all
that was available I think I'd solder and support the wire although trying
to solder heavy cable is difficult as it soaks up the heat so fast.