Electrical Design: Complying with the 120% Rule

Is it true that the above design complies with the 120% rule using either a 150 Amp or a 200 Amp main breaker?

a. True b. False

Answer:

The above design complies with the 120% rule using either a 150 Amp or a 200 Amp main breaker. The statement is true.

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Explaining the answer:

The above statement is true as the 120% rule in electrical design ensures that the main breaker's capacity is adequate for the load it is protecting.

According to this rule, the main breaker should be at least 120% of the continuous load of the system to provide a safety margin. In this scenario, both a 150 Amp and a 200 Amp main breaker would comply with the rule as they exceed 120% of the continuous load.

Understanding and following the 120% rule is crucial in electrical design to prevent overloading and ensure the safety and efficiency of the system.