11218156

Paragraph Number

91

In embodiments of the cover 800 that use graphite 810, the negative temperature coefficient of resistance of the graphite 810 will result in the graphite 810 losing resistance as the temperature of the graphite 810 increases. Preferably, the cover 800 is designed such that the two graphite elements 804 do not draw over a maximum current such as about 20 amps. Therefore, the size, width, and length of the graphite 810 are selected such that the combined graphite elements 804 will not draw enough current to activate a 20 amp breaker even when the graphite elements 804 reach the maximum temperature of about ninety-five degrees.

Added by DJM 2 2021