New York State Master Electrician Practice Exam

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What is the minimum wattage for household electric clothes dryers in a dwelling unit?

4000 watts
4500 watts
5000 watts
5500 watts

The correct answer is: 5000 watts

The minimum wattage for household electric clothes dryers in a dwelling unit is 5000 watts, aligning with the National Electrical Code (NEC) guidelines and general industry standards. The choice of 5000 watts is based on the typical energy requirements needed to effectively power residential dryers, ensuring they can adequately generate the necessary heat for drying clothes efficiently. This consideration is crucial, as using an appliance with insufficient wattage may lead to longer drying times and increased wear on the appliance, not to mention potential safety risks associated with underpowered devices. Understanding these specifications is key for electricians and homeowners alike to ensure that electrical installations meet both performance standards and safety regulations. In this context, the other wattage levels, while they may appear as viable options, do not meet the established minimum requirement and may not reflect the common operational needs of residential dryers effectively.