The breaker on our range tripped recently. I found the terminal block burned, and replaced the plug/block/ and portions of the wiring from the block that were dammaged. The wire from the block is stranded 12AWG, which seemed a bit skimpy to me. I fired up all four burners and measured 28A on the 12 awg wire. Are there different standards for internal wiring or does the 20A limit still apply?