Aux Battery Cabling

Boy this is getting heated, must be using too thin a wire or drawing to much current.

What I would like to know is, what does every one do about venting (no, not like they have been on here) the area or box the battery is in, you don't want the corrosive fumes eating out the back of the body.

I have a 100 whatever DC battery and wish to fit it in the back off side rear in the Disco but am concerned about the gas/fumes coming off it during the charging cycle.

I don't know about the numbers but the cable is heavier than starter cable that I am using. I had wiring burn out before charging a battery in the vehicle when I was using twin flex to connect the two batteries up.

Cheers

Mike

Quote:

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Originally Posted by nismine01

What I would like to know is, what does every one do about venting (no, not like they have been on here) the area or box the battery is in, you don't want the corrosive fumes eating out the back of the body.

I have a 100 whatever DC battery and wish to fit it in the back off side rear in the Disco but am concerned about the gas/fumes coming off it during the charging cycle.

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Hi Mike and as long as the battery is mounted in a plastic battery box, you are not going to have an corrosion problems, and you do not have to vent anything, you and yours will be quite safe.

Once again *********, you have no idea what you are posting.

Mike specifically asked about ?€œgas/fumes?€?, and as there is no such thing as a lead acid battery that is sealed against gassing. They would explode if they were.

?€œSEALED?€? means they are spill proof, not sealed against gassing.

Furthermore, Optima batteries now have that specifically stated on their batteries, including their Yellowtop batteries.

It states they are ?€œSPILL PROOF?€?

You can use any form of battery in the cab of a vehicle and there are at least two dozen makes of NEW vehicles that have the cranking battery in the cab or in a compartment connected to the cab.

*********...

3.14 x 4 is how you're doing your maths - ok..

But....

Multi- strand cable has "gaps" so the cable will be bigger than a straight 4mm.

Also, most flow is on the outer surface of a conductor so the multi strand helps this be more effective.


I'm unsure why you are arguing for, your statements aren't accurate for much of the data you've posted.

A D34 will draw a high inrush and charge quicker if it has a nice fat feed from the alternator.

Why wouldn't people want that capability :)

And feel free to ignore me, and my background working with this sort of gear on military aircraft!

You not seeing it?
Attachment 86360

See any limit on charge current for alternator?

Once again we find a thread with personal attacks, which the mods are again looking into.


Read the original post, nowhere was it asked what size cable should be used.


It asked where to run the cable that the original poster was going to already use.


Time to get back on track to the original question.


Cheers Ean

Most vehicles these days have Maintenance Free batteries. These are wet cell batteries and even though they are not sealed, they don?€™t gas.

If they did gas, then you would be replacing them every few months.

The statement, ?€œNo gassing under normal charging conditions?€? applies to most batteries, AGM or otherwise.

Charging a battery using an alternator is not going to cause a battery to gas, and as such Mike?€™s question was answered without your erroneous claim he needed a ?€œSealed Battery?€?, especially as there is no such thing.

as there were 25 million VW Beetles made and every one of them had a standard type cranking battery fitted under the rear seat and no one was ever gassed.

You can do all the googling you like, but the fact you have no idea of what you are reading, you are simply continuing to get it wrong.

Furthermore, the cheery-picked ?€œEXTRACT?€? relates to batteries being charged by battery chargers and not just lead acid batteries but nickel-cadnium.

The cheery-picked ?€œEXTRACT?€? has nothing to do with charging by an alternator.

Two totally different types of charging systems, or are you inferring Mike is going to be driving down the road with one hell of a long extension cord, so he can charge his battery with a battery charger while he is driving?

As I posted earlier, there are more than two dozen NEW makes of vehicle that come with the cranking battery mounted in or near the cab and if these batteries vented, then it would be into their cabs.

So you are saying you know better than all the vehicle manufacturers.

NOT LIKELY!!!!

Quote:

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Originally Posted by Ean Austral

Once again we find a thread with personal attacks, which the mods are again looking into.


Read the original post, nowhere was it asked what size cable should be used.


It asked where to run the cable that the original poster was going to already use.


Time to get back on track to the original question.


Cheers Ean

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Come on guys - a mod has spoken - can you two work out who has the biggest wire somewhere else.

Quote:

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Originally Posted by Tombie

Also, most flow is on the outer surface of a conductor so the multi strand helps this be more effective.

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I believe that "skin effect" only applies with AC - at least that's what I was taught when I did my radio technician training - it's the reason Litz wire was used.

Litz wire - Wikipedia, the free encyclopedia

One thing to be considered is that auto parts shops often designate wire by the overall diameter of the insulation, not the wire core. 4mm ain't 4mm, Sol (with apologies to Castrol).