Merrimack Valley & Southern New Hampshire
Electrical Subpanel Installation
Need more circuit space for a garage, workshop, renovation or addition? We assess your existing electrical system and plan the right way to supply the new circuits.
Family-owned since 1979. Based in Dracut and serving nearby Massachusetts and Southern New Hampshire communities.
Our office confirms the appointment type and applicable charges.
More circuit space. The same service capacity.
A subpanel is a secondary electrical panel supplied by a feeder from your existing electrical system. It groups circuits near the area they serve and can provide additional breaker spaces.
A subpanel does not increase the power supplied to your home. Available capacity, panel condition and the proposed loads must be checked first. Repeated trips or dimming lights need electrical diagnosis; they do not automatically mean you need a subpanel.
Garage & workshop
Plan circuits for tools, lighting, receptacles and future equipment. Share motor and appliance specifications so starting loads can be considered.
Renovations & additions
Coordinate circuit planning for a finished basement, kitchen remodel or new living space before walls and ceilings are closed.
Detached structures
Assess the feeder route to a garage, shed or outbuilding, including distance, excavation, disconnects and grounding requirements.
Subpanel, dedicated circuit or service upgrade?
A subpanel may suit several new circuits or a distant work area when the existing supply and equipment can support them.
A dedicated circuit may be enough for one appliance or an EV charger. A separate panel is not automatically necessary.
Panel replacement or a service upgrade addresses different needs: equipment condition, circuit space or supply capacity. We explain which issue your project actually needs to solve.
What we check before installing a subpanel
Capacity, sizing & protection
We review the existing service and proposed loads, feeder capacity, panel rating, compatible breakers and the number of circuits needed. A 60 amp or 100 amp feeder is selected for the assessed load and installation conditions, not simply because that is the panel’s label.
AFCI and GFCI requirements depend on the circuits and work involved. Feeder length and voltage drop also matter, especially for detached buildings or equipment with substantial starting loads.
Location, grounding & access
The panel needs suitable working space, access and an enclosure rated for its location. Main-lug and main-breaker configurations serve different installation needs; we assess the required disconnecting means.
Neutral and equipment-grounding connections must be arranged correctly for a subpanel. Detached-building grounding and disconnect requirements need separate consideration. These are installation details for the electrician, not homeowner wiring instructions.
What affects subpanel installation cost?
A panel beside the existing equipment is a different project from supplying a detached garage across a finished yard. Your assessment should establish:
- Equipment: panel and feeder ratings, circuit count, breaker protection and any corrections to existing equipment.
- Feeder route: cable or conduit, distance, accessible versus finished spaces, trenching and surface restoration.
- Project scope: new branch circuits, permits, inspections and coordination with other trades.
We explain the recommended work and price before you authorize installation. Confirm who handles drywall, painting, landscaping or other finish repairs.
Tell Us About Your ProjectFrom assessment to installation
- Discuss your plans. Tell us your town, the area being supplied and the equipment you want to use. Share photos you already have; do not remove panel covers.
- Assess and plan. Review capacity, equipment condition, route, panel location and options for future circuits.
- Confirm scope and approvals. Explain pricing, permit responsibilities, inspection steps, access and the expected power interruption.
- Install and check. Complete the agreed work, identify circuits, check operation and coordinate the required electrical inspection.
For remodels and additions, plan electrical work before insulation and wall finishes. In Merrimack Valley and Southern New Hampshire, the applicable code and local permitting process depend on the property’s jurisdiction.
Code references: Massachusetts Electrical Code and New Hampshire State Building Code.
Subpanel installation questions
Does a subpanel give my home more power?
No. A subpanel adds circuit distribution space; it does not increase the electrical service supplied by the utility. We assess existing and proposed loads before recommending a subpanel, service upgrade or another solution.
Can you install a subpanel in a detached garage?
A detached garage or workshop can be a suitable location after assessment. Distance, feeder routing, excavation, building disconnect requirements, grounding and the equipment you plan to use affect the design and price.
Do I need a 60 amp or 100 amp subpanel?
The appropriate feeder capacity depends on calculated loads, equipment, conductor installation conditions and the available supply. The rating printed on the panel alone does not establish how much power the installation can deliver.
Is a subpanel the right choice for an EV charger?
Not always. One charger may need a dedicated circuit rather than a separate panel. We review the charger specifications, existing capacity and any compatible load-management options before recommending equipment.
Do subpanel installations need permits and inspections?
Plan for an electrical permit and inspection. The applicable requirements depend on the municipality and work involved. We confirm responsibilities and approvals for your Massachusetts or New Hampshire property before installation.
How long will installation take, and will power be off?
Timing depends on feeder distance, access, excavation, new circuits and any related corrections. An outage is needed for parts of the work. We explain the affected areas and expected interruption after assessment; inspections may occur separately.
Related electrical services
Serving homeowners in Lowell, Salem, NH and the surrounding service area.
Request a subpanel assessment
Use the form below or call (978) 957-3422. Include your town, the space you are updating and any equipment you plan to add.
