Where is the power supply insurance for the Otis door machine?

Cam switch behind the gantry crane shaft (in the resistance box). According to the elevator recruitment website, the power supply of Otis gantry crane is fixed in the cam switch behind the gantry crane shaft (in the resistance box). Otis Electromechanical Co., Ltd. is an important subsidiary of Otis. NYSE is in China. Established in March1997 12 and headquartered in Hangzhou. It provides elevator and escalator products, as well as overall solutions for installation and maintenance services of public facilities, commercial buildings, houses, urban renewal and other projects.