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diy solar

What ate my cable?

Mr. Moon. Are the wires brittle near the failure?

Read up on dissimilar metals and galvanic corrosion.

My failed CCA wired looked very similar to the one in your photo.

Replace with pure copper cables and quality lugs and you should be AOK.

If you are in the USA, I use this company for my wiring needs:


Their cables are tinned copper, if you are wondering about the silver color in the website photo.
 
Hello.

Suddenly my battery pack stopped producing any load. Then I found out that this happened to the wires. Does anybody know what have cause this? The cable you see is branded Four Connect Stage1 10mm^2.

Thanks in advance.

View attachment 287715
Was the cabling hanging down?

I've seen cables blow out from the inside if they are hung down and the weight of the cabling starts snapping strangs where the lugs are. If enough strands are snapped the current will blow out the rest of the strands and jacket.

If it wasn't crimped very well heat will build up and do the same if under a big load. Looks like 4 guage wire so around 90 amps maybe is the limit??
 
Holy smokes!! Is there a large dead rodent on the floor??

There isn't a rodent thats gonna eat through cable lol.
That's why you put steel wool in holes so mice and rats can't eat through it

Funny to think about though. Just think if we had rodents that could eat through metal .
They will eat the jacket though
 
Hello.

Thank you everyone for the answers! Really appreciate it. I wish I had to time to answer everyone personally, but I will do it one post, as many questions do repeat.

This is how I found it:

View attachment 288690

It was inside the sealed plastic case, so no, it was not eaten, chewed, sawed or under any mechanical load. The wires have identical damage on both ends near the terminals. I was thinking that I have exposed wires to some humidity before crimping, so water got trapped near the end of wires and eventually corroded. But I cannot tell for sure.
I have seen a type of flexible wire used to string 220-volt lights in Laos that spontaneously corrupted like your pictures show. It seems the insulative sheathing on the outside was not entirely impermeable to moisture, or that it was not applied properly at the factory, and the wire itself would develop bulges, then bursts, followed shortly by inability to carry current past the corrosion point. I guess it would be the wire equivalent of spalling.

The cheap cable would do this--and would last just fine for about nine months to a year, after which virtually not so much as two contiguous meters of it could be found still usable. It was best to just replace the entire length.

I don't know where the stuff was made, but Laos borders China and buys a lot of cheap Chinese junk. In America, the Chinese products sold are typically of at least three times the quality of the products they sell to countries in Southeast Asia. But you may have some wire from a worse batch than usual, as it resembles some of what I have seen in these parts, likely from a poor-quality factory in China.

I'm not sure the CCA has as much to do with the corrosion as the poor-quality insulation around it. Perhaps it breaks down in the sun, or perhaps it is simply more susceptible to humidity. In any case, some brands of the same type of stranded wire would do fine, while others simply would not last more than a year.
 
There isn't a rodent thats gonna eat through cable lol.
That's why you put steel wool in holes so mice and rats can't eat through it

Funny to think about though. Just think if we had rodents that could eat through metal .
They will eat the jacket though
Rodents can, and do, eat through wire. That is precisely why I had to put my ethernet cables that ran above the hanging ceiling into a conduit. The rats had chewed through them, forcing me to replace them. After putting the wire inside conduit, I had no more issues with it.
 
There isn't a rodent thats gonna eat through cable lol.
That's why you put steel wool in holes so mice and rats can't eat through it

Funny to think about though. Just think if we had rodents that could eat through metal .
They will eat the jacket though
Friday, I cleaned up a large pile of mostly extruded heavy aluminum scrap. Near the bottom of the pile was some thin aluminum sheet metal. Something chewed a nice big hole right through the middle of the sheet metal. The hole was a little more than 2" in diameter. I didn't take a picture because I have seen things like that before and it wasn't really noteworthy to me.
 
And squirrels, mice, etc...

They wont eat through steel maybe, but for absolute certain, they will eat aluminum, and copper...
 
I live in a woods. I have had this problem if I sit the vehicle in a particular spot. 3 Different times they chew through the insulation and then chew the copper wire. Talked to my dad who was a mechanic most of his life. He says back in the day when wire were mostly made in the states automotive had standards where wire was made with byproducts to resist rodents but now as the market has changed to offshore thous standards went away and that is why you see more of this happening. I suspect it was a ground squirrel, piney or ground hog, with no droppings giving an indication.
 
I live in a woods. I have had this problem if I sit the vehicle in a particular spot. 3 Different times they chew through the insulation and then chew the copper wire. Talked to my dad who was a mechanic most of his life. He says back in the day when wire were mostly made in the states automotive had standards where wire was made with byproducts to resist rodents but now as the market has changed to offshore thous standards went away and that is why you see more of this happening. I suspect it was a ground squirrel, piney or ground hog, with no droppings giving an indication.
I think we are going to need a bigger cat! 🦡🦡🦡
 
He says back in the day when wire were mostly made in the states automotive had standards where wire was made with byproducts to resist rodents but now as the market has changed to offshore thous standards went away and that is why you see more of this happening.
Send this to your dad.

 
I didn't say soy.
My dad is not available any more so keep any future thoughts about my dad to your self, thanks.
You don't have to say soy. The article shows that old and new cars' are equally susceptible to rodents chewing wires. There is no magic potion in old wires to resist rodents.
 
You don't have to say soy. The article shows that old and new cars' are equally susceptible to rodents chewing wires. There is no magic potion in old wires to resist rodents.
Yes, rodents have been known to chew on wires from as early as it has been invented possibly even Benjamin may have an article about it. But it's just that, an article wrote buy an opinion of other opinions. You discredit my opinion with another opinion. All the comments on that article showed cars made newer than 1973 and most from 2000 up. That alone should have shown you a discredit from the wording of "old" verses newer cars leaving your added wording of "magic" which is not in the article, potion in old wires. I never said it never happens, but more so in these newer models.
 
Voles around here will make exactly that kind of damage. 5 years ago they chewed the power cords on several of my big power tools🤬, pulled out the insulation from my water heater, sampled a dozen places of a new 100’ roll of 12/2 and almost burned my house down by chewing through the hose of a portable outboard motor fuel tank. I stepped into the garage and there was a strong smell of fuel. At every site of damage, there were no droppings, only along the walls and behind things. I never found them but I put out a lot of poison so they probably left or died somewhere. You can bet that I sealed up the garage after that and keep fresh sticky traps in obvious paths.
 
Send this to your dad.


I have had personal experience with this, and can share, anecdotal or not. Had a Toyota Sienna, rats chewed through some cables under the hood. Had the cables replaced, rat chewed through the very same cables again. My only solution left was to spray those, and only those cables with peppermint oil. The rats left my Sienna in peace.
During all this time, my Ford Maverick and Ford Lightning parked pretty much right next to the Sienna, never had any issue. Til this day, still no issues whatsoever with the trucks' cables. I gave my brother the Sienna, hope he doesn't live in a semi rural area like I do :)
 

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