Jump leads warning

'Now lookee here...'

I got stung for about a tenner. It could have turned out worse. I'm hoping that sharing my experience will help prevent someone experiencing something more painful and expensive.

Er, that's it.
 
No idea, but it is excellent.
Most 'western' manufacturers brand their products, its part of advertising. The Chinese seem very slow to accept the idea of developing brand loyalty (strangely, an exception is climbing equipment, carabiners, harnesses, rope).

So if there is no brand - maybe its of Chinese origin.

Have noticed an increased frequency of promotion of sailing equipment, LFR, blocks, deck organisers (all unbranded) by the likes of AliExpress. They say to Antal's quality. Prices seem to be increasing to a point where its really not much cheaper than the 'western' manufacturer, Antal et al

Jonathan
 
I thought aluminium was used instead of copper for transmission cables (power pylons). The choice was determined by the price of copper/aluminium (LME) at the time of installation.

Jonathan
 
I thought aluminium was used instead of copper for transmission cables (power pylons). The choice was determined by the price of copper/aluminium (LME) at the time of installation.

Jonathan
I understand that strength-to-weight (about two times better in the alloys used, corrected for the slightly thicker cables) is also major factor. It's hard to hang copper; stronger towers closer together.

trivia:

"The official IUPAC spelling for the element with atomic number 13 is aluminum, although aluminium is also recognized in the international scientific standard (as adopted in 1990)."
 
So ... how did you expect big gauge copper good clamps for a tenner? #4 AWG wire is $2-3/foot for the cheap stuff ($4-6/ft for a double strand). Copper costs more than that. Anything under $60 is not going to be worth much, and $40 is the bare, bare minimum.

TGTBT. We set ourselves up for disappointment.

I've gotten many great deals from China, but you have to read between the lines.
Fair point. It's easy to just look at how many stars something has on Amazon, and not engage critical thinking skills about whether it's too good to be true.
 
I understand that strength-to-weight (about two times better in the alloys used, corrected for the slightly thicker cables) is also major factor. It's hard to hang copper; stronger towers closer together.

trivia:

"The official IUPAC spelling for the element with atomic number 13 is aluminum, although aluminium is also recognized in the international scientific standard (as adopted in 1990)."
Weight for weight, aluminium is a better conductor than copper - you can make thicker cables for the same weight.
 
Aluminium has higher resistance than copper so needs to be larger cross section.

At lower voltages, low resistance is crucial to keep the power the same as the performance of something like a starter motor isn't linear, ie it doesn't do half the work at 6v vs 12v, in fact it won't work at all.

Everyone remembers Ohms Law V=IR and power W=VI.

If you try to draw 200-300 amps through a piece of cable from a 12v supply, minimal resistance is key otherwise losses (cable heating up) are unacceptable.

It's why your winch/windlass/starter motor cables are so fat. And preferably low resistance copper. Silver would be better but a bit too expensive to use!

https://www.allaboutcircuits.com/tools/ohms-law-calculator/
 
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Jesus, I am so sorry for mentioning aluminium. I did not intend to start a war.
There are some really touchy pedants on here, get a life guys.
No-one is being touchy - but someone mentioned aluminium as if it was cheap and nasty - for electrical transmission its everyday - and not commonly known as part of The Grid

Jonathan
 
Some techies replaced an 11kVa transformer on a pole up in the field, some months ago. I exchanged a couple of 'gas-powered' flasks of coffee for a few offcut metres of the cable they'd been using.

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I'm still wondering what I could possibly use it for....
 
I have a couple of jump lead sets that are useless .... thin wire inside thick insulation ...

I also have one that does work - but when first use - clamp fell off one lead - crimp not done properly !!

Guy who runs break down Service ... he only uses DOUBLE cable setups ... that is two +ve and 2 -ve cables with single HD clamp taking 2 cables .. he reckons shop cables are 'crap' !!
 
trivia:

"The official IUPAC spelling for the element with atomic number 13 is aluminum, although aluminium is also recognized in the international scientific standard (as adopted in 1990)."
Your trivia is wrong! IUPAC adopted Aluminium in 1990, but in 1993 acknowledged that the American Chemical Society was widely using Aluminum and so said you can use either. Most official IUPAC publications use Aluminium as their house style. In reality nobody in the rest of the world cares.
 
Not new or unique to Chinese. My first experience with bad jumpers was 50 years ago. Often the wire is good, and the first thing you should do when you buy them is check the crimps.
Well, I listened.... and tried again with Amazon, but more expensive.

On delivery, I peeled back the far-better rubber sleeves -and discovered the crimps had been made in exactly the same 'bad-contact' manner as the first set which caught fire.

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So I'm conflicted. Do I send them straight back? Amazon are good like that, but what then?
Or do I hoik out my tools and do a 'proper job' ( that's Cornish for ☑️ ) and just live wi' them?
 
I've just remembered. When my brand new jump leads failed to work, I tried to re-solder the crocodile clips. The cables appeared to be impregnated with a powder, like talcum, which proved impossible to remove and made soldering impossible, at my skill level anyway.
 
I've just remembered. When my brand new jump leads failed to work, I tried to re-solder the crocodile clips. The cables appeared to be impregnated with a powder, like talcum, which proved impossible to remove and made soldering impossible, at my skill level anyway.

Not only some Jump Leads with that .... found that with quite a few other cables .. even thin delicates ...
 
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