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Lubrano 
Copper - Posts: 113
Copper spacespace
Joined: October 19, 2003
Posted: October 18, 2005 at 4:28 PM / IP Logged  

Hello,  I have a 100 watt rms 2 channel amp.  I have decided to run 8 awg.  My question is what is the difference between thhn / thwn (regular building wire stranded )  and car audio wire?  I am an electrican and can get the wire for free.  I know the car audio is more flexible but is that all??

Thanks

Sal

Hornshockey 
Silver - Posts: 520
Silver spacespace
Joined: January 31, 2005
Location: Texas, United States
Posted: October 18, 2005 at 4:44 PM / IP Logged  
I'm not too familiar with the building wire; but I'm fairly sure the strands in that wire are much thicker than the car audio wire. The hosehold wire is designed to carry AC current which I beleive travels more on the inside of the wire; whereas DC travels on the surface.
Thus, smaller strands=more surface area
somebody correct me if I'm wrong; I'd like to know
Life moves pretty fast; if you don't stop and look around once in a while; you could miss it.
haemphyst 
Platinum - Posts: 5,054
Platinum spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spacespace
Joined: January 19, 2003
Location: Michigan, Bouvet Island
Posted: October 18, 2005 at 5:27 PM / IP Logged  
You are wrong. AC travels on the surface, DC uses the whole wire. It's called "Skin effect" Look it up. (Not trying to sound smart mouthed about that either, just trying to give you a starting point.) That being said, 60Hz skin effect is STILL so deep (at 8.5mm) , that it really won't matter WHAT size wire you use in a house - it still uses the whole wire.
The bad part about using household (building) wire, is the flexibility. It is not as flexible as wire designed for use in the car, and tends to have a higher failure rate.
It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."
Blowntweeters 
Silver - Posts: 650
Silver spacespace
Joined: June 03, 2005
Location: Nevada, United States
Posted: October 18, 2005 at 5:36 PM / IP Logged  
spend $25 bucks at wal-mart you can get a complete 8 awg kit.
1974 ford pinto 4 15" punch Z power punch bd 1001 pioneer DEH-6700
Hornshockey 
Silver - Posts: 520
Silver spacespace
Joined: January 31, 2005
Location: Texas, United States
Posted: October 19, 2005 at 2:41 AM / IP Logged  
ah; so I was backwards; good to know
thanks
Life moves pretty fast; if you don't stop and look around once in a while; you could miss it.

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