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Unread 07-24-2013, 06:39 AM   #71
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Default Re: Battery cable length

If you like broken battery posts, go right ahead.
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Unread 07-24-2013, 08:06 AM   #72
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Default Re: Battery cable length

the electrons run on the surface of the copper . with fine strains of copper wire there is more surface then on one solid bar
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Unread 07-24-2013, 08:36 AM   #73
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Default Re: Battery cable length

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Originally Posted by Swan View Post
the electrons run on the surface of the copper . with fine strains of copper wire there is more surface then on one solid bar
I know this is the case with AC current and I mentioned the very same thing here before. I was corrected and told DC current is carried through the wire rather than on the surface. Anyone want to confirm this? If this is true, would we not be better off using solid copper wire?
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Unread 07-24-2013, 08:55 AM   #74
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Default Re: Battery cable length

Surface current is an AC phenomenon only. Technically the electrons flow thru the whole cable, but because the change in flux direction, the current in the middle of the cable is cancelled out leaving only the surface to carry current.
Solid cable is a better conductor, technically, but in practice, the flexible cable can better handle the flex and torque placed on the battery pack during a ride.
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Unread 07-24-2013, 09:12 AM   #75
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Default Re: Battery cable length

Posted to the "solid copper for battery cables?" thread.

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Originally Posted by doodles bug View Post
I’ve been hanging around lurking in the shadows since some insulting posts to a particular thread appeared. I haven’t posted since but, now that this has come up a second time in another thread within a few days. I feel compelled to comment about some misinformation posted here.

Electricity does NOT travel on the surface of a conductor, it travels through the conductor. Seems some people are very confused about a phenomena called “skin effect”, you can read about it here. Seems 35-40 years ago, in my college days, we also referred to it as shell thickness. The skin effect is characteristic of AC, caused by magnetic fields, and only need to be considered for high frequency applications or really huge conductors.

Solid or stranded makes little difference unless the strands are insulated from one another (see Litz wire).

Wire (conductor) is NOT rated by voltage. That 600V you may see printed on the insulation is an insulation rating.

Conductors have several different current ratings. The NEC tables give 3 different ratings, grouping different insulations into one of the three groups. These ratings are for enclosed insulated conductors. There is another “free air” current rating and another rating for uninsulated wire such as might be used as a jumper on a circuit board.
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Unread 08-07-2013, 11:36 PM   #76
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Default Re: Battery cable length

Going to pick up my welding cable early next week. 03 CC 6" lift How many feet do I need?
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Unread 08-08-2013, 08:39 AM   #77
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Default Re: Battery cable length

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Originally Posted by kenacp View Post
Going to pick up my welding cable early next week. 03 CC 6" lift How many feet do I need?
my series cart took a little under 30 feet
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Unread 08-08-2013, 10:39 AM   #78
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Default Re: Battery cable length

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my series cart took a little under 30 feet

mine would be under 10 feet (93 cc)
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Unread 08-08-2013, 11:16 AM   #79
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mine would be under 10 feet (93 cc)
? Really dont we at least have 2 cables going from fnr to motor in length of around 5 ft each
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Unread 08-08-2013, 12:12 PM   #80
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Default Re: Battery cable length

you are correct on the cables going to the motor and the one from neg to motor .. but they are 3 feet each ... i just measured all cables and came up with aprox 15' 6"
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