Exactly according to the rules ladies & gents. It's a sad thing to play good samaritan then get bit in the butt for it.
Jumping from coach to house batteries does not involve eight pounds of copper windings the inductor.
When I built alternators for towtrucks I connected 3-mica .01 uf caps 1-2, 2-3, 1-3, across the stator leads. A 10, 000 uf electrolytic via a short as possible 10-gauge pigtail. Ganged atop the top of the cap was a 100 uf electrolytic, and a reverse biased Motorola MR2535 avalanche rectifier. Then a 2nd MR2535 across the alternator field connection
Ambulance companies and the city of LA purchased more than 200 sets. Then I ran out of higher voltage electrolytic caps. One Fire Chief called the suppressor "A miracle". All due to one horrified glance at an oscilloscope screen. I miss my scopemeter. An MR2535 clamps voltages at 28-32. The caps did the rest.
