# Question

A 5.5-kW water heater operates at 240 V.

(a) Should the heater circuit have a 20-A or a 30-A circuit breaker? (A circuit breaker is a safety device that opens the circuit at its rated current.)

(b) Assuming efficiency, how long will the heater take to heat the water in a 55-gal tank from 20oC to 80oC?

(a) Should the heater circuit have a 20-A or a 30-A circuit breaker? (A circuit breaker is a safety device that opens the circuit at its rated current.)

(b) Assuming efficiency, how long will the heater take to heat the water in a 55-gal tank from 20oC to 80oC?

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