mica

asbestos

glass wool

porcelain

reduce the current for controlling the temperature

change the direction of current flow for controlling the temperature

regulate the heat and thus the temperature by switching the element to ON-OFF

switch ON-OFF the indicator lamp

repulsion motor

permanent capacitor motor

capacitor-start induction-motor

shaded-pole motor

decrease the current

drop the voltage applied to the fan

increase the speed

increase the torque

increase the speed

protect the fan in case a fault occurs

produce a phase-shift

control the speed