Hi all
We noticed the 1A vs 25A problem on a Pro601 a few years ago - many things that had passed at 25A suddenly failed at 1A. It seemed that the measured resistance at 1A was higher than at 25A. Same thing was found on our newly acquired Rigel So we wired some (big) resistors to plugs and measured them. Somewhat surprising they seemed to show the same resistance at any current - they were allowed to cool betwen tests of course before someone asks.
I didn't understand, I don't understand, I didn't want to change to 1A anyway so we went back to 25A testing. Do things blow up - do they heck.
You can have all the theory you like but the earth cable is there to blow the fuse in the event of a L-E fault and I do like to know it will. 25A for 12 seconds tests a wire, lower current or shorter times do not. OK you could damage a cable - but just try to damage one and see how long it takes - not allowing it to cool between tests is cheating.
