Basic: 100A indoor replacement — Panel, new breakers, basic wiring; 6–8 hours; total $1,200–$2,000; includes standard permit where required. If you're planning any electrical work, one of the small but important items on your list will be the junction box. At first. The calculator will instantly give you a rough cost range based on national and regional pricing averages. Need a custom quote? Reach out to us today for a quote tailored to your specific project. Every commercial installation is different, and the type of space you're wiring has a big impact on. 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. The distribution box cost encompasses not only the initial purchase. The average cost to hire an electrician to install or repair light fixtures, outlets, switches, or fans ranges from $141 to $419 with homeowners spending $280 on average. PVC Old Work Round Electrical Ceiling Box,4" Dia (3. 5" Joist Spans, Grey, Electrical Outlet Boxes. Its depth-mounting gauge at bottom of bracket helps you align the box at the proper depth relative to the ceiling. Two factory-supplied #10 x 2.