I am trying to find a short to ground in a battery backup and surge protector and I saw a video on YouTubewhere the guy placed a current through the contacts of an inductor that was removed to check the board for shorted components causing the short, he put a 3.5V and the full 10A that his expensive HP 6542A could handle. He found the heated component by finger touch and then used alcohol to pin point the culprit. My question is should I buy a 30V 10A 110V Precision Variable DC Power Supply or is a 5A max enough? Some people use like quarter amp to do the same thing. Any advice would be appreciated. Thanks for the input.