Hello, sorry it has taken me nine years to reply to your question. I have the original yellow CD interrupter and controller as well as three phase motor contactor, three phase motor fuse panel and other switches that were used in the Jail or the front office of the Sheriffs office. When this system was installed in the local Sheriffs office I was 16 years old, now am 75. The used a 20~ scheme to operate some remote relays to activate the system remotely-
Bob