"G.R. Patterson III" wrote in message
...


Mike Rapoport wrote:

I have that chart but I am unclear on how it applies to my question.

Look at the point at which the 12ga wire size line hits curve 3. That is
approximately 2/3 of the way between the 30 amp line and the 50 amp line.
I take
that to mean that that wire size can take that amperage for a short period
of
time. If you follow the horizontal line from that point over to the length
scale, you get a maximum length for a 14 volt system of 12 feet. And, yes,
the
voltage drop and temperature considerations you mention apply.

I think it says that if I load a 12ga wire with
30A at 14V at 20C the wire can be a maximium of 16 feet long if the
voltage
drop is limited to 1V.

That too.

It also doesn't define intermittent.

If you take a closer look at the label in the lower right corner, it
states
"maximum of two minutes." This is also stated in the text.

I think that your chart might be somewhat different mine certainly doesn't
have that note. I will have to search the text to see if it is there. My
copy is AC 43.13-1B CHG 1 and is dated 9/27/01 which is the most current (I
think)

Mike
MU-2