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Why wont the 753SSR sensor turn off the lights, it is wired to a contactor?

FA296973

15 April 2021

Even though this is a 3 wire device it still has leakage current and enough to keep the contactor energised therefore your lights will remain on. The way to prevent this is to use a 31CAP in parralell with the load. This will provide an alternate path to neutral.