Positive to ground inline fuse popping

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You can get an arc regardless of which terminal is connected last; it's exactly the same connection? 8)

As far as currect flow goes, most tech's, including me, were taught the negative to positive flow theory. But, if you ask a physicist he will swear it's positive to negative. It makes no practical difference for our purposes.

And we're not going to get into solid state components where holes flow instead of electrons. :(

Ernie
 
Actually not trying to get to picky but electricity really flows from negative to positive.
Click to expand...

LOL! Somebody was bound to bring that up, but it's irrelevant. The electrical potential (voltage) is considered to be from Positive to Negative, even though that's a design convention more than a physical fact about how the electrons actually move about.  Some DC electrical devices don't care which pole is which, but the ones that do are designed based on the convention that flow is from positive to negative. If you try to switch the polarity, those devices won't work (led lighting is a common example).

And then there is the solid state logic stuff that Ernie mentioned. Let's not go there...  :D

For those that would enjoy a relatively simple overview of DC current flow convention vs the actual physics, see https://www.allaboutcircuits.com/textbook/direct-current/chpt-1/conventional-versus-electron-flow/
 
The fact of the matter is that electrons (electricity) flows from negative to Positive. Way back when, the founding fathers of electricity thought that electricity flowed from Positive to Negative. Later on, when it was discovered that electricity actually flowed from Negative to Positive the electrical geniuses at the time decided that for all intents and purposes, it didn't matter. It didn't matter because the formulas and practical applications were not affected in any way. Everything still worked just fine either way and so it was decided to stick with the existing convention rather than cause confusion. The physicists, mathematicians, electronics industries and all those otherwise involved in electricity understand this concept that electrons actually flow from neg to pos and so still stick to the original concept rather than change because it doesnt matter.
 
Ome way to isolate the problem would be to remove all the DC fuses. The install the main neg. to ground fuse. Ig the fuse pops, then the problem is with the main power cables. If it doesnt pop the main fuse, add one fuse at a time. When you hit the fuse that pops, that is the component where the problem exists.
 
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