In a dwelling, how many 20-amp branch circuits are required to supply power to a clothes washing machine?

In residential electrical installations, the National Electrical Code (NEC) specifies that a clothes washing machine must be supplied by a dedicated 20-amp branch circuit. This requirement ensures that the appliance has sufficient power for operation without overloading the circuit, which can lead to electrical hazards.

Providing one dedicated 20-amp branch circuit allows for the washing machine to operate safely, taking into account its starting currents and continuous running demands. It is designed to avoid nuisance tripping of breakers and ensure that other household circuits are not affected when the washing machine is in use.

In addition, the dedicated circuit stipulation prevents the washing machine from sharing the circuit with other high-demand appliances, which could exceed the current rating and create potential safety risks. Therefore, a single dedicated 20-amp branch circuit is necessary for compliance and safety when it comes to a clothes washing machine.