![]() In addition, if your codes will allow you to have two main disconnects, the building inspection department may require a load demand calculation on the electrical system. They will insist on having one main disconnect that protects every electrical circuit in the house Some local electrical codes won’t approve having two main disconnect panels in one structure. You may also run into an issue with your area’s building and electrical codes. The cost of running two separate service lines may also increase the cost. Disconnect panels are a bit more expensive than sub-panels. The cost to install two main service panels with disconnects may be slightly higher. There may be a rental unit located adjacent to your home. ![]() Resolute hobbyists may have a detached workshop or art studio. Many larger homes have a pool cabana and equipment structure. This is especially true if the second panel is installed in a separate structure. ![]() Having a main disconnect on each panel in different locations may seem logical and more efficient. This information should give you a good foundation for your decision about your electrical service. We look at both types of installations, the requirements, and the costs. Understanding the advantages and disadvantages of each type of installation is important when having this conversation. Your licensed electrician can answer many of your questions about installing 2 service panels where a 400-amp service is connected. Contact your local building inspection department for the exact local codes. Local codes may also speak to installing two 200-amp panels. There are code differences depending on whether the installation includes a sub-panel or two independent disconnect panels. The National Electrical Code (NEC) doesn’t prohibit installing two 200 Amp panels where 400-amp service is delivered to the residence. Many homeowners, builders, and contractors wonder if using a pair of 200 Amp service panels is a viable option. Wiring diagrams comprise certain things: symbols that represent the components within the circuit, and lines that represent the connections together. Today’s modern appliances and electronics demand more and more power requiring higher amperage electric service. A wiring diagram is a kind of schematic which uses abstract pictorial symbols to demonstrate every one of the interconnections of components in a system. More and more, we are seeing 400 Amp service being run into residential properties across the US.
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