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Mathematics 7 Online
OpenStudy (anonymous):

An electrician must decide between 3 heaters. The wire that he is using is rated 15A maximum, anything beyond that is a fire hazard. Two of the heaters operate off a standard 120V circuit. One is rated 900W and the other 1800W. The third operates off a 240V circuit and can deliver 3000W of power. Which heater should be used and why?

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