also try use the jumper cable to start up large diesel engine also you can see the jumper cable do move even smaller jumper cable do move the same way with med/large gas engine too due the current and mangatic force on the wires to push each other out ward it happend to me many time espcally when the starter have direct short inside the starting motor
merci, marc
ps it also do show up with 3 phase service too when someone is stupid egough to bunch each phase in one conduct and it will viberate and build up pretty good amout of heat too
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[This message has been edited by frenchelectrican (edited 08-04-2004).]