Electronics > Power/Renewable Energy/EV's

4 out of 5 vendors are scamming people with wrong crosssection of cables

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eTobey:
I have ordered cables from 5 different places (Germany). 4 of them had sent me cables that had about 20% less crosssection than advertised. I measured via visual and electrical methods, so there is no doubt about my measurements. One one ocassion, the outer diameter had me feel that it was to little, and sure enough it was...

Have you ever checked on the cross section?

ejeffrey:
What kind of cables?  Power or signal?  Were they advertised to conform to a particular industry spec or just a specific size?

 

eTobey:

--- Quote from: ejeffrey on April 28, 2024, 04:08:57 pm ---What kind of cables?  Power or signal?  Were they advertised to conform to a particular industry spec or just a specific size?

--- End quote ---
I wrote in this section of the forum, because it has the word "power" in it.  ;)

But i also found in one delivery where i ordered a few 0.35mm2 cables, one cable to beeing substantially less.

Seemingly, many people just trust what there is advertised. But you cant trust anything nowadays...

mariush:
Do they use the exterior diameter (with insulation), or the inner diameter (as if you stripped)

On stores like Digikey , Newark and others you get a datasheet for the cable where it tells you how many strands of wires are used, and what's the gauge of each strand.

See for example https://www.digikey.com/en/products/filter/single-conductor-cables-hook-up-wire/474  you see there a column with number of strands and thickness of each strand


edit : you seem to be in Germany so TME.eu may work better : https://www.tme.eu/en/katalog/wires-and-cables_112533/

You can see all the parameters at the Stranded cables section : https://www.tme.eu/en/katalog/single-core-cable-strand_100147/

Stray Electron:

--- Quote from: eTobey on April 28, 2024, 09:53:03 am ---I have ordered cables from 6 different places (Germany).
Have you ever checked on the cross section?

--- End quote ---


   Where were the cables made?   Undersizing of wire and cables made in China has been widely reported on this and other sites.   A lot of the wire is also reported to be made some kind of junk alloy that isn't solderable.  I've learned to not trust the ratings of anything made in China.

  A few years ago my 730 pound Miller welder got dumped unto the ground when the frame of my Chinese made 900 pound rated trailer bend under the load and within 30 seconds of placing the welder on it and before we had moved it even an inch.

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