Specs: deep weatherproof box, AFCI/GFCI combo, outdoor wiring. Prices shown are estimates intended for planning. Understanding distribution box cost involves examining the comprehensive investment required for electrical distribution systems that serve as crucial infrastructure components in residential, commercial, and industrial settings. (3). It is the silent heart of any building, pumping electricity to every corner, yet we only think about it when the lights go out or the budget needs a signature. Key cost drivers include panel amperage, indoor vs outdoor location, wiring length, and whether a full panel upgrade or rerouting is needed.