Why should appliances have their wattage rating clearly marked?

Appliances should have their wattage rating clearly marked primarily to help users understand their energy consumption and prevent overload. The wattage rating indicates the maximum amount of electrical power the appliance will consume when operating at its peak. This information is crucial for users as it allows them to gauge how much energy the appliance will use, which can inform decisions related to energy efficiency and cost management.

Knowing the wattage also helps prevent overload conditions. For instance, if multiple appliances are connected to the same circuit, knowing their individual wattage ratings can help users avoid exceeding the circuit's capacity, which can lead to tripped breakers or even electrical fires.

While correct outlet connections and compliance with building codes are important considerations, the main reason appliances display their wattage rating centers on energy consumption awareness and safety regarding electrical load management. Aesthetic concerns are generally unrelated to the technical requirements of electrical appliances.