In article ,
Aaron Fude wrote:

Smitty Two wrote:
In article ,
Aaron Fude wrote:

I'm learning to interpret the table here (about 1/3 of the way down):

http://www.powerstream.com/Wire_Size.htm

What are examples "Chassis wiring" and what is "power transmission"?

My specific situation: I have a 70 foot run of 10/3 wire to a subpanel
inside my house. How many amps can I have on that subpanel?

Thanks,

Aaron

Chassis wiring is *short* lengths of wiring inside a machine. I use 16
gauge in an industrial food processor that draws about 15 amps. That's
well under the chassis wiring limit, but far more than you could draw
through house wiring. It's all about ohms per foot.

So then the table tells me that I can only have 15amps in my subpanel.
That can't be right.

From the notes accompanying that table:

"The Maximum Amps for Power Transmission uses the 700 circular mils per
amp rule, which is very very conservative."

"NOTE: For installations that need to conform to the National
Electrical Code, you must use their guidelines."

DAGS "NEC wire ampacities" or similar for links to other tables, or wait
for the resident a.h.r. code junkies for further info, but yes, I'm
pretty sure you can pull more than 15 amps through 10 AWG wire.