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Old 01-13-2010, 10:21 AM   #1
The Architect
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opinions can get preeeetty expensive lol
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Old 01-13-2010, 08:17 PM   #2
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opinions can get preeeetty expensive lol
yep, and change from person to person a lot too.

I personally think that when it comes to power cable... that the best stuff you can get isn't the fancy car audio cable... but rather the cheaper welding cable that you can find at any welding supply store.

some people like the fancy wire because it has a million and three strands, but really all that does is make it more flexible... My take, on it is that as long as you have thousands of strands three isn't a DC electric difference... also, cable that is the thickness of your thumb is not going to be very flexible no matter what the strand count... no way around it. Welding cable comes with one with more layer of protection in the form of a paper jacket, and it is UL certified, can withstand oil, gas, and extreme temperatures which not all fancy car audio cable can.

with that said... most people would disagree with me.

recently there seems to be a Knu-boner going on round here.
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Old 01-13-2010, 08:56 PM   #3
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some people like the fancy wire because it has a million and three strands, but really all that does is make it more flexible... My take, on it is that as long as you have thousands of strands three isn't a DC electric difference... also, cable that is the thickness of your thumb is not going to be very flexible no matter what the strand count... no way around it.
higher strand # helps reduce eddy currents, as minimal as they may be.

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recently there seems to be a Knu-boner going on round here.
It's sexy and cheap lol.
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Old 01-13-2010, 09:21 PM   #4
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higher strand # helps reduce eddy currents, as minimal as they may be.



It's sexy and cheap lol.
and gets the job done...cant really go leaving that one out. just bc somethings sexy and cheap doesn't mean its safe....cough.
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Old 01-13-2010, 09:54 PM   #5
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higher strand # helps reduce eddy currents, as minimal as they may be.



It's sexy and cheap lol.
not sure how eddy currents are involved as that is talking about magnetic fields... maybe you are thinking about the "skin effect".

Skin effect is straight up propaganda... at the amperage levels you are talking about, the entire conductor is saturated regardless of strand count.

Would love to see the results of resistance test on 15ft of 1/0awg car audio cable vs that of 1/0awg welding cable... It'd take some might expensive equipment to measure any difference from the two electrically... and who knows, the welding cable might just win. Like I said... welding cable is UL certified, it actually has to meet standards.


Cheap? Car audio wire is usually 50% to 100% more than welding cable of the same awg. The real reason you buy it is cause it's sexy.
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Old 01-13-2010, 11:26 PM   #6
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not sure how eddy currents are involved as that is talking about magnetic fields... maybe you are thinking about the "skin effect".

Skin effect is straight up propaganda... at the amperage levels you are talking about, the entire conductor is saturated regardless of strand count.
The separate conductors act similar the laminated cores of transformers to help prevent eddy currents.

http://en.wikipedia.org/wiki/Transformer#Cores

As for skin effect, it is a very real thing, I promise. We use air/foam core cables at work because it helps eliminate it. The skin effect only starts happening at much higher frequencies than audio, so unless someone is using power cable to transmit RF, skin effect isn't going to be happening on the power cable.
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