DC electrical system according to the FAA

[Gordon Misch]

This seems to make sense: Right-hand rule is convenient.

https://twcontrols.com/lessons/conv...n was,convention or conventional current flow.

And this:
https://eng.libretexts.org/Bookshel...:_Conventional_Current_Flow_and_Electron_Flow

 

[moneyburner]

And make sure it says 'Fluke' on it!

Oh crap! Here goes ANOTHER argument.

Web

or Simpson

 

[Gordon Misch]

HP

 

[BC12D-4-85]

Klein 720

Gary

 

[aflyer]

https://xkcd.com/386/

tried to paste the picture, here is a link

 

[fobjob]

It’s Ben Franklin’s fault. He had a 50/50 chance of getting it right…and….

Pos to neg is “conventional current flow” and generally in mil standard documentation, is portrayed as flowing from top of the sheet to bottom.

(and signal flows left to right)