ICC Residential Electrical Inspectors Practice Exam

What is the demand load for a single dryer rated at 4,750 VA?

1. 4,500 VA

2. 5,000 VA

3. 5,500 VA

4. 6,000 VA

The correct answer is: 5,000 VA

The demand load for a single dryer rated at 4,750 VA is typically calculated using the National Electrical Code (NEC) guidelines, which often allow for rounding and maximum demand adjustments. In this case, when determining the demand load for household appliances like dryers, the code notes that the demand can be considered at a percentage of the total load for calculations. For a single dryer, it is common practice to round the rated load to a standardized figure. The rated load of 4,750 VA is often approximated to 5,000 VA for practical purposes. This rounding up aligns with how electrical demand is often assessed in residential settings, providing a more straightforward approach for capacities that match equipment needs without creating an overload. By choosing 5,000 VA, it acknowledges both the operational capabilities and potential limits of the installation without exceeding the necessary safety margins. This figure allows for moderate allowances in demand calculation while reflecting the rated load appropriately. Thus, it is the most reasonable estimate when interpreting demand for this type of appliance.