Electric meters are placed in meter boxes for several main reasons:

Safety: Meter boxes provide a closed, safe environment that prevents unauthorized persons from touching meters or wires, reducing the risk of electric shock and fire. This is critical for electrical safety in common and residential areas.

Protection: The meter box protects the meter from bad weather, dirt, moisture and other external environmental factors. This helps ensure the meter's accuracy and long-term reliability.

Easy to read and maintain: Placing the meter in the meter box allows power suppliers and electricians to easily read meter data for maintenance and repair. There is no need to enter hazardous areas or require power outages.

Protect privacy: In residential areas, meter boxes can also protect the privacy of residents and prevent unauthorized persons from viewing electricity usage information.

Compliance with regulations: According to state and local regulations, electric meters must be placed in designated meter boxes to ensure compliance with electrical regulatory requirements.

In summary, placing meters within meter boxes helps ensure a safe, stable and reliable power supply while meeting regulatory requirements and providing easy access and maintenance opportunities. This practice helps protect the integrity and safety of the meter and power system.