For household electric clothes dryers, what should be the basis of load determination as per the recommendations?

The recommendation for determining the load for household electric clothes dryers is based on the specific rating provided on the appliance's nameplate. This rating reflects the manufacturer's specifications and represents the maximum continuous load that the dryer is designed to handle safely and efficiently. The nameplate information typically includes the voltage, current, and wattage requirements, which are crucial for ensuring that the electrical system is adequately sized and capable of supporting the appliance's operation without the risk of overload or hazard.

Using the nameplate rating ensures that the determination is both accurate and aligned with the manufacturer's guidelines, promoting safety and compliance with the National Electrical Code (NEC). This method allows for more precise calculations when designing electrical systems and ensures that the installation meets the necessary safety standards without relying on general assumptions or averages from similar models.

Operational history of the dryer, average loads from similar models, or maximum calculated loads from all circuits may not provide the same level of specificity and could lead to underestimating or overestimating the requirements for safe operation. Thus, relying on the nameplate is crucial for making informed electrical calculations.