"Paul Hovnanian P.E." wrote in message
...
John Gilmer wrote:

"Bob Peterson" wrote in message
...
THHN is rated at 90 deg C

That's just not high enough for the application. When the oven is
running
HOT (especially is self-cleaning mode) the top of the over can get above
boiling.

PFAH and TFE types with nickel coated copper are rated to 250 C and are
approved for 'leads within apparatus' according to the NEC (Table
310.13). The question is whether 250 C is sufficient for connections
within a stove/oven.

"Within" the over? Nope.

BUT the connections are not made at the truly HOT spots. The inside of the
over might easily be 500F and the space below the burners might be 250F.
The elements are designed so that there is no heat produced within the last
4 to 8" leading to where the connection is made. The connection is made
outside the over and arrangements are made for air to circumlate to keep the
area (relatively) cool. (For the surface burners, efforts are made to
shield the wires an connections from radiation from the hot parts of the
elements.)

Baring something like an oven fire, 250C wire should be safe.