12/24/2023 0 Comments Cost of a 20 slot subpanelInstalling a subpanel in a detached garage or structure requires a disconnect switch, more materials, and trenching to run the wire underground from the main structure. Power requirements – Upgrading the main electrical panel may be required provide more power to the subpanel. Permits & inspections – Installing a subpanel often requires a permit and inspection:Īn electrical inspection costs $100 to $250. Materials and upgrades – Supplies needed typically include wiring, connectors, fasteners, junction boxes, and possibly GFCI circuits and outlets. Installing a dedicated circuit costs $250 to $900. Installing new circuit breakers costs $150 to $300 per breaker. Adding a new subpanel requires wiring each new circuit breaker to a receptacle or appliance. replacing – Replacing a subpanel typically requires less labor as the circuit wiring is already in place. Size and location – More circuits and a longer wiring distance require more labor and materials.Īdding vs. Subpanel installation cost breakdown Factor
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