Battery Cable Thickness 6 Volt

Hi

I was wondering what the factory battery cable thickness was in mm2 on the TE series 6 Volt tractors

Regards
Jone

I use (I think) 1/0 welding cables & have ends crimped on by the store . HTH ! God bless, Ken

(1/0) wire is ~0.3249in ~8.25 mm

If the two battery cables are 3 feet long each:

#1 (7.3 mm) gives a 4.6% voltage drop
#1/0 (8.25 mm) gives a 3.7% voltage drop
#2/0 (9.2 mm) gives a 2.9% voltage drop

If the cables are 5 feet long:

#1 gives a 7.7% voltage drop
#2/0 gives a 4.8% voltage drop
#3/0 (10.4 mm) gives a 3.8% voltage drop

What is the current assumed to come up with these voltage drops?

Edit: Given a fixed resistance in a length of wire, increasing the current in that wire will result in a reduced voltage drop over its length. Therefore these figures cannot be accurate in the absence of a specified current.

Further, increasing the length of the wire will result in a proportionate increase in resistance leading to a proportionate increase in voltage drop - but that is not consistent in the figures given.

- TS

This is miss leading. This suggests larger gauge wire (smaller dia) may be better, however, the larger the gauge the lower the ability to carry the current needed particularly at 6 volt.

Misleading how? I posted each wire-size along with it's voltage drop. In each column, the largest gauge wire shows the least voltage loss - i.e. better for the job. And you find that confusing?

I gave AWG size and actual diameter in millimeters(as requested). The largest diameter wires show the least amount of loss.

What exactly do you find misleading? I don't think it can posted any clearer. I suspect any possible problem here is in you comprehension.

If you don't like the AWG gauge numbering system - then complain about the people who created it. And if you don't like the metric system ???

The amp load is for the starter on the tractor the original poster asked about.

Max draw is 150 amps at 5 volts (750 watts) when cranking. That's what the 6 volt starter draws under normal cranking load and 5 volts is the designed working voltage for a 6 volt starter. That is an average figure. Same starter when in full-lock (full power and not turning) can draw 250 amps and when cranking a worn engine with low compression 70-100 amps.

As to more wire length resulting in more loss? Well yeah . . . where do you claim I posted anything otherwise? With a 3 foot run, I showed #1 AWG to have a 4.6% drop and the same #1 cable when 5 feet long has a 7.7% drop - longer with MORE loss. You don't call that "proportionate" to length?

I also show various wire diameters at the same length and the small wires ALL show MORE loss. I've got no idea what the heck you are talking about. Please be specific.


If the two battery cables are 3 feet long each:
#1 (7.3 mm) gives a 4.6% voltage drop
#1/0 (8.25 mm) gives a 3.7% voltage drop
#2/0 (9.2 mm) gives a 2.9% voltage drop

If the cables are 5 feet long:

#1 gives a 7.7% voltage drop
#2/0 gives a 4.8% voltage drop
#3/0 (10.4 mm) gives a 3.8% voltage drop

I posted a simple chart showing how much power is lost with various copper wire sizes and length when used on the poster's 6 volt starter.

All show more loss with smaller wire . . and/or . . with longer wire.

Yet, so far there are two posts claiming I did the opposite? I'm a little confused here. Toora Stephen and Jeff-oh.

Are you guys seeing something I am not? Or do you NOT understand what a voltage drop is?

i think not all people understand that after you get to 1 gauge wire the numbers go back up to get even bigger/heavier wire. 1 to 1/0 to 2/0. sometimes i think audio replies would be better on these forums.

I could understand that IF I hadn't posted the actual wire-diameters in MMs alongside every AWG #.

What I don't understand is some people so willing to complain about posts that they don't take the time to read properly. And if there is something they don't understand? Maybe give it some thought and research before ranting?

Is someone is so willing to "jump the gun", I suspect they act just the same in other forms of communication (or lack thereof).

The incipient poster here asked a straight-forward question and I attempted to answer as simply as possible.

I am very disapointed in jeff-o's rant on this issue.Jone's question was answered simply and correctly by ldj.

Thanks guys, i got most of my answers, but don't let this small question create a big argument. have a good one, and thanks all of you

JT

Hei Jone, vi tar dette på Norsk. De har helt andre måter å måle på i USA, og i England bruker de også andre kabel standarder enn her. Altså, vi har våre standard, 1,5 mm2, 2,5mm2, 25, 35, 50, 70 og så videre. Men i England finner du 1 mm2, 2, og andre verdier som vi i Norge ikke har.
Jeg skal prøve å finne det ut i England.

Selv bruker jeg 70mm2 på 6 volt Gråtass. 35mm2 er ikke unormalt for 12 volt, og da er 70mm2 ikke unormalt for 6 volt. Selv om ikke det besvarer spørsmålet ditt.

Bill

..

No need to get so defensive, LJD!
I was mistaken by the fact that you listed 3 different cable thicknesses for the 2 different lengths.

- TS

I took the time to post accurate info on voltage drop in relation to wire length and size. You mis-read it, misunderstood it - and claimed I posted incorrect information. You are the one that posted invalid info.

So, first you complained about something I did correctly due do YOUR comprehension error, not mine.

And now - you complain because I defended those figures?

Hey, a mistake is a mistake - I've got no problem with that since I make many myself. But in this context - this is nonsense. You've now complained about me twice.

Well in my defense, your honour, it was rather badly laid out (if I may be so bold as to say so).

...and I also think you over-reacted (and within your rant combined input from more than one person), but yes, I made a mistake.

- TS