Re: Rewinding microwave transformers

Hi,

I'm a little confused by the calculations on this page you
referenced.

When calculating the current carrying capacity of the secondary
winding, we are told to find a wire diameter that has enough circular
mils for the current we want (750 or 1000 circ. mils per amp). 12 AWG
has 80.8^2 = 6529 circular mils which gives us 8.7 or 6.5 amps
depending on if we use 750 or 1000 circ. mils per amp.

Now, 12 AWG wire is used for house wiring up to 20 amps. Why such a
big discrepancy? I realize that you wouldn't want a transformer
operating up to 90 deg. C (like house wiring is rated) but the results
are still too far away to make sense.

What say ye transformer guys?

Gary

> For those experimentors who like to research the details, Here is a
> great site that will give you the math to calculate wire sizes.
> It has everything you need to know and more.
>
> http://members.tripod.com/~schematics/xform/xformer1.htm