Branch circuits that serve a bathroom, kitchen, or clothes washing machine in a school are required to be rated at what amperage?

The correct answer reflects the requirements set forth in the National Electrical Code (NEC) regarding branch circuits that serve specific areas within buildings, including schools. For circuits serving bathrooms, kitchens, and laundry areas, a 20-ampere rating is specified to accommodate the potential load of equipment typically used in these environments.

In kitchens, for instance, appliances such as microwaves, toasters, and other devices may have higher power demands that necessitate a robust electrical supply; thus, a 20-amp circuit ensures that there are adequate resources to support simultaneous usage without tripping the circuit. Similarly, bathrooms often have high-demand devices like hairdryers, and laundry areas typically feature washers that can also draw significant current.

This amperage requirement is crucial for maintaining safety and functionality, preventing overheating and possible damage to the wiring due to overloads. Designing circuits with this amperage rating helps ensure that the electrical systems are both safe and compliant with code requirements, allowing for the primary functions of these spaces to occur without risk.