SpudFiles

Dewey, I have a coffee cup with that chart printed on it.

Sprinkler Guy, For relatively short lengths of wire, it is resistive at low frequencies so wire size and DC formulas work fine.

For real long runs of wire, inductance and capacitance play a role. This is why you may see the power company use capacitors on long rural lines and use an inductor in a HV substation to correct power factor to lower current and regulate the voltage.

Technician1002 wrote:Dewey, I have a coffee cup with that chart printed on it.

Is that for remembering as you get older?

I am surprised I still remember all those formulae or is it formulas!
It has been 45 years since I learned them.
I had a slide rule that was used for Electronics back in my schooling days.
I believe it was from CIE. (Cleveland Institute for Electronics)
I took the mail order class just to get the slide rule. Wish I still had it.
Someone stole it back in 1969.

http://en.wikipedia.org/wiki/Cleveland_ ... lectronics

http://www.rfcafe.com/references/electr ... 967-ew.jpg

It was sent to me by ISCET as a memento with their logo. I display it with pride.



I've been a journeyman member since the 1980's sometime. Passed the exam in the top 5% first time.