ORIGINAL: Tired Old Man
Good explanation.
Others have been trying to tell people for years it's similar to plumbing to make mental imagery easier. Bigger pipe, more flow. They don't like to listen and instead figure more is always better. Ain't so.
You 'gotta quit using mixed metaphors Pat....
For a simple explanation of amperage, the water pipe/plumbing description works as advertised but in this discussion guys are talking about voltage which would equate to pressure in a pipe/plumbing description. That's a whole 'nuther ball game as has been pointed out above. Increasing the water pressure (voltage) increases friction loss (resistance) in a given size hose/pipe.
Where the newbie 'lectric guys really get into trouble with these ideas/computations, is when the load is variable like most 'lectric powered models as that changes things again vs. the example JNorton gave which is a fixed load.
Being a retired firefighter, I know all 'bout friction loss for computing fire flow. Being an A&P required me to learn more about electricity than I wanted to and there is still lots more I don't know, but don't 'wanna learn any more than I have to now to to keep my models in the air, like when it took Dick Hanson 6 months to convince me to give A123's a try.
The plumbing description compared to electricity stuff does work for complete neophytes or those who think they can't grasp some of the basic concepts...
