Load calculation for household electric clothes dryers uses which basis?

Prepare for the Washington Master Specialty Electrician – Limited Energy System (06) Exam. Access flashcards and multiple choice questions with detailed explanations to ensure you’re ready for test day!

Multiple Choice

Load calculation for household electric clothes dryers uses which basis?

Explanation:
For dwelling load calculations, electric clothes dryers have a minimum load consideration. You use the greater of the dryer’s nameplate wattage or 5,000 watts. This means if the nameplate rating is less than 5 kW, you still count 5 kW for the dryer; if the nameplate rating is higher than 5 kW, you use that higher value. The idea is to avoid underestimating the service load by forcing a floor of 5 kW, while not overestimating when the dryer is actually rated higher. Kilovolt-amperes aren’t the basis here because these calculations are based on real power (watts) for this appliance.

For dwelling load calculations, electric clothes dryers have a minimum load consideration. You use the greater of the dryer’s nameplate wattage or 5,000 watts. This means if the nameplate rating is less than 5 kW, you still count 5 kW for the dryer; if the nameplate rating is higher than 5 kW, you use that higher value. The idea is to avoid underestimating the service load by forcing a floor of 5 kW, while not overestimating when the dryer is actually rated higher. Kilovolt-amperes aren’t the basis here because these calculations are based on real power (watts) for this appliance.

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