I pointed out that the charts don't take in consideration for length. You said they show limits as to possible current carrying capability - but you ducked the question of for "how far."
They are ampacity charts, length has nothing to do with the amount of current a conductor will carry. It will still carry the same current if you wrap it around the world 27,000 times. Why don’t you start now and try it?
I didn’t duck your question, I answered it 2 pages ago. Just because you didn’t read it, didn’t understand it or didn’t like the answer, doesn’t mean I didn’t answer it.
WRONG!!!!!!!!!!!!!!!!!!!!!!!!! Length has ABSOLUTELY NOTHING to do with the current carrying capacity.
The longer the wire, the more VOLTAGE DROP it produces. This is a function of the current being carried and the resistance of the wire. You don’t understand basic electricity, READ UP ON IT!!!!!!!! You have confused the fact that you use a bigger extension cord to reduce voltage drop for high current power tools if the cord is long, say over 25’. It has nothing to do with the current carrying capacity of the wire gauge. Furthermore, I didn’t think there was a need to discuss the voltage drop BECAUSE I DIDN’T EXPECT HIM TO USE ANYWHERE NEAR 25’ OF WIRE.
"""""I said 6 or he might get by with 8 for an 85 amp alternator."""""
OVERKILL! Especially for the ground.
Actually, the 6 or 8 I recommended may not be big enough. Parallel conductors are always a problem if one or more fail. If you were to loose the contact between the ground cable from the battery and the starter, the starter current would flow through the parallel conductor provided for the alternator, wire goes poof. It could be protected with a fuse link, but since it’s a parallel conductor, you might never know that the fuse link blew and could run around for years with a piece of wire under your hood not doing anything.
If you actually knew anything about electricity, you would have known about RMS and how it affects heat losses.
RMS is NOT REAL!!!!!!!! RMS can't have any affect on anything!!!!!!! It’s just a mathematical conversion like logarithms. Whether the length of a board is measured in feet, meters or parsecs, the length does not change.
RMS is a unit that makes calculating the average power using the voltage and resistance easier. There’s RMS value for current too, it ain’t real either. Multiply the RMS voltage by the RMS current, in a resistive circuit, and you get a value for average power. It’s just a calculated value, it doesn’t change anything in the real world.
Notice on the thread JYG just posted that explains RMS. Notice at the bottom it talks about heating of a resistive value to measure actual RMS values.
So, what’s your point, assuming you had one other than to just throw some comment out there to muddy the waters?
If your purpose is to toss about electrical terms to make yourself look intelligent, you have failed. I was once in a bar when a punk near me was tossing about the term E equals m c squared in an attempt to feel big. I asked him if that wasn’t Einstein’s theory of relativity equation. It ain’t but he didn’t know that so he answered that it was. I asked him about the “m”, wasn’t that mass or something, he nodded yes. I asked him about “c” wasn’t that the speed of light, again he nodded. I asked him about “E”, wasn’t that energy, he kept nodding. Then I asked him what it was measured in.