Consider a residential apartment where the electric circuit uses a 14 gauge wire for 30 A current on a single phase \( 220 \mathrm{~V}, 50 \mathrm{~Hz} \) main supply. What should be the size of the oirouit breaker to be used for the given load ourrent?
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Step 1: **Understand the Problem** The problem involves determining the appropriate size of a circuit breaker for a circuit using a 14-gauge wire carrying a 30 A current on a single-phase \(220 \, \text{V}, 50 \, \text{Hz}\) supply. Show more…
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Che wiring circuit for a typical room is shown schematically. (a) Of the six locations for a circuit breaker indicated by $A, B, C, D, E,$ and $F,$ which one would best protect the wiring against a short circuit in any one of the three appliances? Explain. (b) The potential difference between hot and neutral is $120 \mathrm{V}$. Suppose the heater draws $1500 \mathrm{W}$, the lamp draws $300 \mathrm{W}$, and the microwave draws 1200 W. The circuit breaker is rated at 20.0 A. Can all three devices be operated simultaneously without tripping the breaker? Explain.
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