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EFV-8 Club Forum / General Ford Discussion / 8 volt battery

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Discussion Topic: 8 volt battery -- page: 1 2 3

TomO

07-01-2013 @ 7:08 AM

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The NEC code is for power transmission, not short power leads. The AWG table gives the current carrying capacity of short power leads.

Here is the link that I forgot in my previous post>

http://www.powerstream.com/Wire_Size.htm

Tom

51f1

07-01-2013 @ 6:56 AM

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I think that the 95 amp limit in the NEC has more to do with insulation and the type of use than than the current carrying capacity of the wire. There are #2 single conductor cables that are rated for 240 or more amps. Number 2 welding cable is rated for 205 amps max. In careful engineering, the voltage drop, insulation temperature limit, thickness, thermal conductivity, and air convection and temperature are taken into account. Only wiring systems conforming to the National Electrical Code must use their guidelines. I made up a cable for my truck using 2/0 cable. The max rating of 2/0 is 380 amps. It may be overkill, but it sure works well!

Richard

This message was edited by 51f1 on 7-1-13 @ 1:34 PM

Brendan

06-30-2013 @ 1:34 PM

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look in the National Electrical Code! table 310.16 #2 copper is good for 95 amps and 2/0 is good for 145 amps. and 250 mcm awg is good for 215 amps.

Can't spell my way out of a paper bag!

TomO

06-30-2013 @ 6:36 AM

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Brendan, I don't know where you got your information, but the original cables were 2AWG and this site confirms that the voltage drop per cable will be about .1 volts for an 18" length cable with 200 amps and 6 volts.

Tom

Brendan

06-28-2013 @ 7:52 PM

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number 2 awg is only good for about 90 amps that is ohms law that is why you cant brake it. you need 2ott for 200 amps. amps is amps in ac or dc it dose not matter

Can't spell my way out of a paper bag!

supereal

06-28-2013 @ 2:40 PM

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At our shop, we have removed several aluminum battery cables that have come in with starter problems. Since copper got very expensive, there has been an attempt to substitute aluminum. This started with jumper cables (no pun). Aluminum forms an insulating oxide at the exposed ends. This high resistance can make the cables hot enough to melt the covering. If you buy cables, particularly for 6 volts, they should feel very heavy. Otherwise, look elsewhere.

fla48

06-27-2013 @ 4:09 PM

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Glad you got the problem successfully resolved. Do not hesitate to ask questions here. There is a world of information available for the asking. And it is free.

41woodie

06-27-2013 @ 1:45 PM

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thanks top everyone who responded to my questions about 8 volt battery. I took my dremel and sanded down all the grounds and got a heavy duty cable from a tractor supply store. car turns over and starts great.i'm a novice at this so probably have more questions in the future. thanks again for helping me out.

41woodie

06-27-2013 @ 1:45 PM

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41woodie

06-27-2013 @ 1:45 PM

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