Question

why double pole switch is used

Answer 1

heya

Double pole, double throw (DPDT) switches allow control from three or more locations. In alternative designs, low-voltage relay or electronic controls can be used to switch electrical loads, sometimes without the extra power wires.

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Answer 2

Double pole, double throw (DPDT) switches allow control from three or more locations. In alternative designs, low-voltage relay or electronic controls can be used to switch electrical loads, sometimes without the extra power wires.