Mike Rapoport wrote:

Thanks. I was hoping for a rule like: "It is permissible to load Tefzel
wire over its (35C) continous rating by XX% for up to XX seconds". It seems
that no such "rule" exists.

Not exactly true. My copy of AC 43.13-1A (I should've looked there first)
contains a chart that can be used to determine the minimum wire size for both
continuous and intermittent loads. If you're going to be building an aircraft,
best pick up a copy. This chart is used to size wire to prevent excessive
voltage drop or to prevent overheating.

Normally you take the load in amps, length of wire, and voltage and read off the
size. Working backwards, 12ga wire shorter than 24' long will carry an
intermittent load of about 45 amps at 28 volts (the scale is not very precise).
The charts don't go down to 2' long pieces of wire.

Disclaimer: I'm not used to working with this chart. Hope I'm reading this
correctly.

George Patterson
The desire for safety stands against every great and noble enterprise.