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
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 and the quite minimal wire that some
power bank starters is no real indication given that those are much
shorter than normal jumper cables. And what works really depends
on how fucked the battery in the car that wont start is too. Sometimes
the problem is just that the voltage with the battery in the car which
wont start sags too much to provide enough voltage to see the
spark plugs firing well and that the reason it doesn’t start. So you
don’t necessarily need a lot of current thru the jumper to the car
used to start it, its not actually turning the starter motor over.
Yep, someone gave my wife a pair of "ridiculously cheap"-looking
jumper cables. And they worked when she needed them. In fact,
looking back they have worked for us twice. But it took about 10
minutes of "revving" before the would turn over.
right, the answer is "it depends"
as is the answer to so many interesting questions..
if the battery is good but just needs to be charged, a thin wire carrying a handful of Amps for a few minutes will recharge it enough to start the car.
The actual starting current comes from the recharged battery, not via the cables.
but if the battery or connections are actually defective, and the current to actually start the car needs to come directly via the cables, heavy wire will be needed.
On Wednesday, April 10, 2019 at 9:16:02 AM UTC-4, firstname.lastname@example.org wrote:
He specifically said jumping a car to get it started. To me, that
doesn't imply charging it, it's when you've left the lights on
in a parking lot or have a battery that is going bad and use someone
else's car to jump start it right away.
The problem there is that if you are really "jump starting" it,
to me that means connecting it to another car's battery/alternator
or similar capacity source. If you do that with a dead battery
or mostly discharged battery like you can expect to find and a thin
wire, it's going to melt the wire, because there is nothing to limit
the current to just a few amps.
But in that case it works fine to use
the jumpers to charge that battery.
Just one of the possibilitys.
But in some situations the problem is that the car that wont
start will turn the engine over fine but the voltage sags enough
so that the ignition cant supply a good enough spark to get
the engine to fire and all the car that is helping to start it
needs to do is supply enough voltage to get the engine
to actually fire and that doesn’t require much current.
Yes, but when you are using house wire, as the OP was
planning to do, its not going to be thin enough to melt.
Thanks for that completely superfluous proof that you
have always were that terminal a pig ignorant fuckwit.
Yes, but the difference is that with a flat or sulphated
battery, the engine can still be cranked over, albeit
very slowly, but the battery may well be producing
a much lower than normal voltage that isnt enough
to produce a decent spark to get the engine firing
in the worst weather conditions in a car with an
old well fucked distributor and plug leads and
On Wed, 10 Apr 2019 17:11:32 -0400, email@example.com wrote:
Computerized electronic ignition is even fussier. Many will not
provide a spark (oe fire the injectors) below 9 volts - and some will
not produce a spark below about 600 rpm cranking speed (ones with
inductive pickup instead of hall effect)
On Thu, 11 Apr 2019 18:12:30 -0400, firstname.lastname@example.org wrote:
Distributor?or points? By 1975 all American manufacturers had
switched to electronic triggers from points. It took untill the late
90s for didtributorless ignition to virtually take over from
distributor ignition. Not sure exactly which car was the last to loose
the rotary distribution spark system
Yes, that is true - but you can run the flag down the pole. If the
battery "sags" from the cranking current there is not enough VOLTAGE
left to make a good spark. That's why on Kettering ignition (typical
points and condenser type of years gone by) there was often a ballast
residtor that ewas shunted out of the circuit for starting. The coil
was designed to run on 7 or 8 volts - about the voltage available from
the battery when cranking a cold engine. Once running the resistor in
the circuit limited the coil current to what it would be at 8 volts.
This was done because a 12 volt coil running on 8 volts coukld not
fire the plugs reliably.
On Wednesday, April 10, 2019 at 9:51:40 PM UTC-4, Clare Snyder wrote:
Huh. I spoke too soon. I can see how cranking could drop the voltage enough to cause other problems, I hadn't thought of that.
I will fold that flag and save it for later. Shouldn't need to wait long, with this crowd.
On Wednesday, April 10, 2019 at 1:52:47 PM UTC-4, Rod Speed wrote:
More BS from the kangaroo's ass. The OP never said "house wire"
He said "electrical wire", which comes in all sizes, not just those
used to wire houses.
Are you as sure about jumper cables and cars as you were about:
How can one dope be wrong on so many things?
737 is a heavy (It's not even close)
The 737 MCAS doesn't rely on just one AOA sensor (It does)
The FAA would never approve that design (They did)
The data from the FDR on Lion Air has not been released (It was in Oct/Nov)
Boeing doesn't know what caused the Lion Air Crash
The 737 can't be trimmed mechanically (It can)
It's impossible to have a design where it's both electrical or mechanical
trim (BS because all 737s and most other planes have both)
The Cessna 150 can't stall (It can, stall speeds are listed by Cessna)
Denies that it's common for FAA to put out directives soon after a crash,
requiring inspection of what they believe caused the problem
in all similar planes in service. (Of course it's common)
The AOA sensors were a known problem with the 737 Max and were already
being replaced at the time of Lion Air crash (total lie)
The FAA didn't ground the 737 Max, Boeing did. (Trump announced the
FAA grounding we have it on video)
Pilots are required by law to read the manual in an emergency, before
taking action. (speaks for itself)
You have a 50" CRT TV (posted lame pic of a much smaller TV, no tape measu
no model, nothing to verify it
Electric pole transformers can glow orange hot, it's not uncommon
(Still waiting for the pics of some of those)
Former leaders have no say in the details of their state funeral (beyond st
The tax rate on capital gains was 93% after WWII (It was more like ~45% max
the 50s was reduced to just 25%)
No one was buying US manufactured goods just after WWII. (ie the US didn't
have a huge
advantage as a manufacturing economy with much of the rest of the world des
following WWII. Obviously more total lies and stupidity)
Investment isn't for capital gain.
Then you wont have any difficulty listing all those
countrys buying US manufactured goods just after
the war had ended. (implying that the US wasn't
exporting manufactured goods after WWII, as much of
the rest of the world was in rubble and rebuilding)
Digital Equipment Stock DEC, was never sold for a capital gain.
The 911 terrorists didn't need flight training, anyone can fly
a 767, just use a PC simulator to learn.
you don’t even know that there even was a doctor involved with Obam
birth certificate. (it's signed by Dr. David Sinclair)
No doctor signs the birth certificate, fuckwit.
What a total moron!
On Wednesday, April 10, 2019 at 2:30:00 AM UTC-4, Rod Speed wrote:
Sure there is moron, just apply Ohms Law and consult a wire gauge table.
An even simpler way is to just look at some jumper cables and select
a similar wire size. More problematic is how to connect that wire to
the batteries, ie people typically don't have giant size alligator
clamps or similar laying around.
and the quite minimal wire that some
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