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Wire Size Conversions?

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Old Jun 24, 2019 | 03:43 PM
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Default Wire Size Conversions?

Man I must be real stupid because I'm not finding what I need.
The metric wire sizes in the '81 wiring diagrams are confusing me some.
I have a 3.0 which I'm replacing with a 12ga wire. Is this the same size as the 3.0 or bigger?
There are some .8 and 1.0 that need to be replaced as well. What gauge sizes should I use in those replacements?



Craig
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Old Jun 24, 2019 | 05:28 PM
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Google is your friend...

3.0 mm = 9 ga approx. Here we have 8 ga as a standard wire available.
Good luck...

https://www.pyromation.com/Catalog/W03.pdf

Last edited by bmans vette; Jun 24, 2019 at 05:30 PM.
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Old Jun 24, 2019 | 05:29 PM
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0.32 - 22
0.41 - 21
0.52 - 20
0.75 - 18
1.32 - 16
2.08 - 14
2.5 - 13
3.0 - 12
4.0 - 11

m
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Old Jun 24, 2019 | 05:32 PM
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Originally Posted by bmans vette
Google is your friend...

3.0 mm = 9 ga approx. Here we have 8 ga as a standard wire available.
Good luck...

https://www.pyromation.com/Catalog/W03.pdf

I believe that 3mm would be diameter rather than sectional area.... Now I'm not sure if the GM book is going to be dia or mm^2 ?
M
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Old Jun 24, 2019 | 06:08 PM
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Originally Posted by bmans vette
Google is your friend...

3.0 mm = 9 ga approx. Here we have 8 ga as a standard wire available.
Good luck...

https://www.pyromation.com/Catalog/W03.pdf
Wow I thought it was a 12 ga wire. I guess I better use 10 gauge?
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Old Jun 24, 2019 | 06:33 PM
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Default I Found It!

I knew I had seen this somewhere. Look at the bottom right corner.

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Old Jun 24, 2019 | 07:07 PM
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Yes, Wire size is in cross sectional area not diameter
M
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Old Jun 24, 2019 | 09:00 PM
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OK...I am confused.

The chart I posted was diameter of the wire.

StreetRats chart in the bottom corner shows the metric measurement as mm2. Isn't that square mm s?????

Head scratcher for sure....



Looks like 12 ga wire will equate to 3 mm. Now....is that stranded wire or solid wire?

Last edited by bmans vette; Jun 24, 2019 at 09:02 PM.
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Old Jun 24, 2019 | 09:16 PM
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Stranded or solid doesn't matter as far a size goes since it's total cross sectional area, stranded is more flexible and the more strand, the more flexible, like those headphones (before bluetooth) that had a zillion little tiny strands so super flexible
M
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Old Jun 24, 2019 | 10:06 PM
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Originally Posted by Mooser
Stranded or solid doesn't matter as far a size goes since it's total cross sectional area, stranded is more flexible and the more strand, the more flexible, like those headphones (before bluetooth) that had a zillion little tiny strands so super flexible
M
The "theory" behind the small stranded wire was AC current (speaker sound transmission) at very high frequencies, solid conductor wire shows increased impedance due to eddy current forcing the current to the outside, aka the skin effect. So the sales pitch was tons of small wires and it'll sound better...
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Old Jun 24, 2019 | 10:24 PM
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Yeah I've never been able to pump enough power through any of those ultra fine wires to get anything on the scope but the math certainly looked good... maybe in something outside of audio or for the doggo but when we played with them on the bench (this was back when the monster cable type wiring first came out)
Now days I'm just happy I can still hear anything
M
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