How many volts are in the main lines that go from the electric meter to the breaker box?

The main line voltage from the meter to the circuit breaker box typically depends on local power supply standards and distribution systems. Globally, there are several common voltage standards. Here are the details:

1. Single-Phase Systems

1.1 120V

• Regions: North America (United States, Canada)

• Usage: Residential and small commercial buildings

1.2 230V

• Regions: Europe, Asia, Africa, Australia

• Usage: Residential and small commercial buildings

2. Three-Phase Systems

2.1 208V

• Regions: North America

• Usage: Commercial and industrial buildings

2.2 400V

• Regions: Europe, Asia, Africa, Australia

• Usage: Commercial and industrial buildings

3. Special Applications

3.1 480V

• Regions: North America

• Usage: Large industrial buildings

3.2 600V

• Regions: North America

• Usage: Specific industrial applications

4. Standards in China

In China, the common voltage standards are as follows:

• Single-Phase System: 220V

• Three-Phase System: 380V

5. Specific Applications

5.1 Residential

• Single-Phase: 220V

• Three-Phase: 380V (less common, typically used in large residential areas or special needs)

5.2 Commercial and Industrial

• Single-Phase: 220V

• Three-Phase: 380V

Summary

• Single-Phase System: The main line voltage from the meter to the circuit breaker box is typically 220V.

• Three-Phase System: The main line voltage from the meter to the circuit breaker box is typically 380V.

If you are in China, residential homes typically use a 220V single-phase system, while commercial and industrial buildings may use a 380V three-phase system. The specific voltage should be determined based on the actual installation and the regulations of the local power company. If you have a specific project or application, it is recommended to consult the local power company or a professional electrician for accurate information.