There are 2 major reasons why you might want to install a circuit breaker sub panel:
First, if the main service panel does not have enough space to hold circuit breakers for any new circuits that you intend to install. The circuit breaker sub panel can, in a sense, create new space for circuit breakers, but in a physically separate location.
Secondly, the sub panel provides a sense of clarity and separation of service from the main electrical panel. Usually, a circuit breaker sub panel will service one separate area that has a discrete function, such as a kitchen, shop, office, or addition. By installing a circuit breaker sub panel, you make it clear which circuit breakers and branch circuits apply to which parts of the house. It is easy to segregate the duties of all of the branch circuits, and to facilitate sub panel repairs, by keeping the circuits sequestered within the circuit breaker sub panel area.
At Advantage Services, we evaluate your needs for any renovation project to determine the feasibility of installing sub panels, and assess your sub panel repair issues.