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What methods do electricians have to connect wires?

Welding wiring, winding with tin and black tape, using universal connector; Welding connection is to weld two wires together by high temperature welding. Tin lining refers to plating a layer of tin metal on the copper wire joint as a protective film, and black tape winding refers to winding two wires together with tape. Compared with the first three methods, I personally recommend the use of Vanke connectors, both in terms of safety and operation.