Multiple meters in household electrical distribution boxes

Installing multiple electricity meters in a household is legal and feasible, provided you follow local regulations and obtain approval from your electricity provider.

Legality and Permissions

Having more than one electricity meter in a single household is generally allowed and can be beneficial for load distribution and billing purposes. Each meter can track electricity usage separately, which is useful in multi-tenant homes or for sub-metering different areas of a large property. However, the installation requires permission from your local electricity provider, and the rules may vary depending on your location and the type of property (residential, commercial, or multi-use).

Technical Setup

Multiple meters are typically installed in the main distribution board or a dedicated meter panel. The setup can involve: Separate incoming circuits for each meter, often connected to different phases in a three-phase supply if available. Miniature Circuit Breakers (MCBs) or Residual Current Devices (RCDs) downstream of each meter to protect individual circuits.

Sub-distribution boards may be used to distribute electricity from each meter to specific areas or appliances within the household. In some countries, the main supply may already support multiple meters, and additional meters can be connected to unused phases without major electrical modifications.

Advantages

Load balancing: Electricity consumption is spread across multiple meters, which can reduce costs if slab-based tariffs are applied. Individual billing: Each tenant or household section can be billed separately. Safety and maintenance: Isolating circuits per meter allows easier maintenance and reduces the risk of overloading a single meter.

Installation Considerations

Always use a qualified electrician to ensure compliance with wiring standards and safety regulations. Obtain a Meter Point Administration Number (MPAN) for each new meter, which uniquely identifies the supply point for billing and monitoring. Ensure that the incoming supply capacity is sufficient to handle the combined load of all meters without exceeding the main supply rating.

In summary, multiple electricity meters in a household distribution box are both legal and practical, but proper planning, approval from the electricity provider, and professional installation are essential to ensure safety, compliance, and efficient load management.