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Thank you all for your input.

Again thanks for answering my questions. petronila and zeusfaber, you're the best! driving the contactor (or another relay) using an arduino relay module was also the suggestion made by my friend. However, I do not know how to wire an arduino relay module to the contactor (or another relay)...

thanks for answering! petronila, is there a much simpler way? I want control the relays using Arduino. Thanks.

Hi guys! I am working on an automation project. I want to switch on/off (using a relay that requires connection to COM and NO/NC terminals) an induction motor that would spin fan blades. My problem is that I do not know the wiring of the electric motor. I opened the conduit box, and it only...