What is the maximum amperage allowed for a single branch circuit supplying bathroom receptacles?

The maximum amperage allowed for a single branch circuit supplying bathroom receptacles is typically set at 20 amperes. This standard is in accordance with electrical codes, which specify that a 20-amp circuit is appropriate for general purpose circuits in areas with higher current demands, such as bathrooms.

Bathrooms often require receptacles that can accommodate multiple devices, such as hair dryers, electric shavers, and other appliances that may draw significant power. As a result, having a 20-amp circuit ensures that the circuit can handle the potential load without tripping the breaker or causing a fire hazard. It's important to adhere to this standard as it balances safety with the necessary capacity for everyday bathroom activities.

The other amperages listed, such as 10-ampere and 15-ampere, do not meet the higher demands typically associated with bathroom receptacles and may not provide sufficient current for multiple devices. A 30-amp receptacle is typically reserved for specialized equipment and is not suitable for general use in residential bathrooms.