ac - How to connect a relay to 220 Volts outlet? - Electrical

I used relays before but just for simple 5V DC signals control using a Raspberry Pi. Now I'm quite cautious and would like to ask for some help from professionals because I'm not planning to set my

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K KRIËGER DIY220 Quick Connect 220V Power Supply, Power 208-240 Volts from Two Separate 110/120V AC Circuits, 220V 15A AC Output Outlet, GFCI Outlet Circuit Tester Included - ETL Certified : Electronics

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