How does an MGT cable achieve a continuous 450℃ temperature rating?

MGT (Mica Glass Tape) operates in environments where standard polymers literally melt or vaporize. It utilizes Mica tape—a natural, fire-resistant mineral—wrapped directly around a nickel-coated conductor, which is then protected by a high-temperature fiberglass braid. It is exclusively used in ultra-high-heat zones like iron and steel mills, cement kilns, and foundries.