How does a 3 pin plug work?

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Tags

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2. #designed
3. #colour
4. #wires
5. #safely
6. #connected
7. #hence
8. #easily
9. #electrical
10. #cable
11. #electricity
12. #three
13. #supplied
14. #mains
15. #specified
16. #identified
17. #appliances
18. #consists
19. #plugs