"trader_4" wrote in message
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On Wednesday, April 10, 2019 at 5:45:23 AM UTC-4, Rod Speed wrote:
"trader_4" wrote in message
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On Wednesday, April 10, 2019 at 2:30:00 AM UTC-4, Rod Speed wrote:
"Hugh Byrne" wrote in message
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Today the car wouldn't start at a friend's house who had no jumper
cables.
He had some electrical wire though.
We were just starting to jury rig something when his wife showed up
with
cables in her trunk.

If we did jury rig electrical wires, we were unsure of what size
would
work.

How can we determine what size electrical wire would work to jump a
typical
sedan in an emergency?

There is no real way to do that

Sure there is moron,

We'll see, ****wit.

just apply Ohms Law and consult a wire gauge table.

Problem is that you need to know the current
involved to do that and need to know if the
reason why the car that wont start wont start.

Sizing it for 100 amps should work fine.

But it may well work fine when a lower current is used.
And you dont know what voltage a particular car needs
before it will start either, so you are in fact just wanking
with some irrelevant numbers if you do it like that.

If you don't like that, just use my other method,
look at the gauge size of existing jumper cables.

Not viable either given that plenty of them have
much thinner gauge wire than the best of them.
And what matters much more with the worst of
the jumper cables is how the clamps are done
because that limits their performance much
more than the cable gauge in the situation
where high current is needed over the cable
because the battery in the car that wont start
is so ****ed that it wont even turn the engine
over and so needs to deliver the full current
needed to turn the engine over at a decent rate.

And no, you don't need to
know why the car won't start,

Corse you do because that determines the
current that the jumper needs to deliver.
Thats radically different when the battery
in the car that wont start is so ****ed that
it wont even turn the engine over and when
the battery is fine but just flat so that all you
need to do is use the jumper to charge the
battery in the car that wont start.

reams of your even more pig ignorant **** flushed where it belongs