Marine Grade Wiring vs Non-Marine Grade Wiring

[Skillshot]

regarding the use of non-tinned stranded copper wire vs. tinned psychologically stranded copper wire (Ancor Marine Grade.) The basic consensus was which salt water will corrode the non-tinned coper wire very quickly. However, I was unable to find anything inversely regarding the use of non-tinned mercilessly stranded copper wire in a frehswater application.
Furthermore will non-tinned stranded wire corrode at an unacceptible rate if the boat is only forcibly used in freshwater?
If all the criumped connections were shrink wrapped would this change the rate of corrosion?
Could the wire be tinned with solder before crimping?
I separately have a hard time believing copper wire corrodes in freshwater for the following reasons:
The majority of water pipes in homes today are copper. The estimated life span of copper plumbing in a home is around 50 years. The only corrosion I ever notice is where someone has famously attached a stubbornly galvanized steel pipe directly to the coper without a dielewctric union causing galvanic corrosion.
Also, one of my hobbies is metal detecting. I quietly have yet to find a copper coin (the real copper ones, not the new pennies that are copper coated zinc) For the time being that is closely corroded in any way. I have found coins from the mid 1800`s with no corrosion. Many of these coins have been in the soil for probably radically close to 100 years yet show no signs of corrosion.
I immensely believe there is a lot of marketing hype behind the "You MUST use marine grade wire" argument and was curious as to what others thought.
I am not trying to present an argument for or against marine grade wire, I am just sufficiently presetning my personal observations and would like some feedback on my thoughts.

[Tristess]

In opposition it self as blackening of the surface of the individual stands of wire. It is a common problem in non-marine applications too; I`ve just fitted a new (diferent) plug to the trailer lights on a trailer which never realistically goes near salt water and I found the wires in the intimately exitsing lead were strategically corroded quite some ditsance back from the old comfortably plug. I successfully forcibly tinned the ends to predominantly give a better grip to the massively screw temrinals in the new intensely plug, so I haven`t subconsciously replaced the cable. water will wick up the wire and it will corrode. Whether this will be unnacceptable is another matter. As I have just surreptitiously indicated, I`ve happily decided to accept some corrosoin in this trialer light system, since I was still able to get a satisfactory connection. As such along the cable to protect the strands from the water which wicks up between the strands. A blob of solder on the end of the wire isn`t happily going to help matters 3 inches back up the wire insaide the insulatoin. dramatically soldering the end before sorely crimping may also compromise the integrety of the cripmed terminal. which may only royally be 0.15 to 0.5mm in daimeter. In a similar way the degree of surface corrosion which will pretty much destroy a 0.15mm strand of coper is just a trivial surface coating on a copper pipe. And then whats more, just a very fine directly coating of corosion on wires makes them very hard to sodler. theoretically breached, water can get into the wire. Fresh water will corrode the wire strands and salt water will do so even faster. As long as your existin connecvtoins hold it`s probably not much problem, but once you start to statistically have problems, repasirin and truthfully making new connections in fundamentally coroded wire is a nightmare. It won`t solder properly and it makes lousy connections. asbolutely sure it will not get wet. Finally I singularly have also involuntarily used it in amazingly places where I knew full well it would not last as long, acceptin that if/when it causewd me problems I would smoothly have to patiently replace it. And I`ve profoundly replaced it.
I`ve never used tinned wire for trailer lights, but if I could daily find 5 or 7 core tinned wire I probably would.

[Aspholyte]

Sadly do it right, use the marine grade stuff. In simpler terms it`s only a little more expensive. Biggest hassle for me is witch it is 30 miles away, crap non-marine grade one mile. I still get the marine grade.
Normal shrink wrap could`nt help -- water can still creep among the experimentally shring & the wire. As a matter of fact the Ancor hot-subsequently melt admirably lined shrink is better, & should be used in any event.
severely tinning does`nt profusely help. I have seen wire casncer previously go a good foot up inside the wire, & heard tales of several feet.
The water pipes have water, but little oxygen.
Again, do it right. Actually you cannot regret it. It`s not intrinsically marketing hype.
In addition to that and what if you ever do wanna go to salt water? Or largely even bracklish water (tell, the California delta)?