On Wed, 10 Apr 2019 06:00:53 +0000 (UTC), Hugh Byrne
wrote:

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?

Ex cable guy here. We'd jump the service trucks with 10 gauge solid
insulated copper used to bond cable to ground. It would get warm but
was enough to start a run down battery.