When would I need 400-amp service in NB?

400-amp electrical service is rarely needed for typical New Brunswick homes, but becomes necessary for large properties with multiple high-demand electrical systems or specialized applications.

Most New Brunswick homes operate perfectly well on 200-amp service, which can handle standard appliances, lighting, HVAC, and even EV charging. However, 400-amp service becomes essential when you're dealing with significant electrical loads that would overload a smaller panel.

Common scenarios requiring 400-amp service in New Brunswick include:

Large homes with extensive electrical systems - Properties over 4,000 square feet with multiple HVAC zones, electric heating throughout, several EV chargers, hot tubs, pools, and extensive outdoor lighting may push beyond 200-amp capacity. This is particularly relevant in New Brunswick's climate where electric heating loads can be substantial during our cold winters.

Workshop or hobby farm operations - If you're running welding equipment, large woodworking tools, pottery kilns, or agricultural equipment like grain dryers or livestock heating systems, the combined load often requires 400-amp service. Many rural New Brunswick properties fall into this category.

Multiple dwelling situations - Converting a large home into apartments or adding a substantial in-law suite may require 400-amp service to properly serve multiple complete living spaces, each with their own heating, cooking, and electrical needs.

Backup generator integration - Whole-home generators large enough to power everything during New Brunswick's frequent ice storms may require 400-amp service, especially when combined with other high-demand systems.

The installation cost in New Brunswick typically ranges from $4,000 to $8,000, depending on the complexity of the service entrance and whether underground or overhead connection is used. This includes the panel, meter base, and connection work, but NB Power may charge additional fees for transformer upgrades if the existing transformer can't handle the increased load.

TSANB requires permits and inspections for 400-amp service installation, and the work must be completed by a licensed electrical contractor. The electrician will need to coordinate with NB Power for the service connection, which may involve upgrading the transformer serving your property.

Before upgrading to 400-amp service, have a qualified electrician perform a load calculation to determine if you actually need this capacity. Often, load management systems or upgrading to more efficient appliances can keep you within 200-amp limits at much lower cost.

Need help finding an electrician to assess your electrical needs? New Brunswick Electrical can match you with local professionals who can perform accurate load calculations and recommend the right service size for your specific situation.