What voltage rating is used for calculating the demand load for residential ranges?

The correct voltage rating used for calculating the demand load for residential ranges is 240V. This is because most electric ranges in residential settings operate on a 240-volt circuit. The use of 240V allows for higher power appliances to function effectively, as they require significant energy to operate their heating elements and other components.

In the context of demand loads, which assesses the expected load usage over a certain period, using the correct voltage ensures accurate calculations for proper circuit design and to ensure safety within electrical systems. Appliances like electric ranges draw more current than those operating at a lower voltage would, and this 240V rating reflects the standard practices followed in the National Electrical Code (NEC) for such appliances.

The other voltage levels mentioned, while they do appear in various contexts related to electrical loads, do not correspond to the operational requirements and standards of residential ranges. Therefore, the selection of 240V is aligned with both practical application and regulatory guidelines.