What determines whether equipment gets a green wire or not? TVs, toasters, handheld hair dryers and just about anything for home use get two wire power cords. Computers and other ITE get three wire cords. Is the distinction commercial vs. residential (class A vs. Class B)? It doesn't seem purely safety related, since a metal toaster would appear to be more prone to dangerous electrical faults than a doubly-isolated all plastic handheld hair dryer. What is the rule here?
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