New Construction and GC Electrical Work in NH and Massachusetts

What New Construction Electrical Work Covers

Everything from the temporary power on day one to the final inspection: the service and distribution, the rough-in, the fixtures and devices, the equipment connections and the commissioning, on a program set by somebody else.

The electrical is rarely the critical path on a commercial build, but it appears on it at several specific points, and those points are what the coordination is about: the utility date, the gear delivery, the rough-in window before the building closes, and the inspection sequence ahead of occupancy.

We take this work across southern New Hampshire and northern Massachusetts: commercial and light industrial in Manchester, Bedford, Hooksett and Goffstown, the Nashua and Merrimack corridor, Concord and the surrounding towns, Henniker, Weare, Hillsborough and Hopkinton as home territory, the Seacoast at Portsmouth, Newington, Dover and Rochester, and over the state line in Lowell, Lawrence, Haverhill, Methuen and Andover.

New Hampshire master license 14569M goes on the permit here, with a separate Massachusetts license for work over the border. A general contractor working both sides of the line gets one electrical sub rather than two, and the service area page sets out the full geography.

Working as a Subcontractor to a General Contractor

On most commercial builds the general contractor runs the program and the electrical fits into it, which makes reliability worth more than anything else on the quote.

What a GC actually needs is a sub who turns up when the schedule says, who flags an electrical dependency before it becomes their problem, who does not hold up the trade behind them, and who handles their own permits and inspections without being managed.

The dependencies worth flagging early are consistent: how long the utility will take, when the gear will actually arrive, what has to be in before the slab is poured or the walls close, and which inspections have to happen in what order. A GC who knows those dates can plan around them; one who finds out late cannot.

We also work directly for owners on smaller commercial projects where there is no general contractor, which changes the coordination but not the work.

The Service, the Utility and the Long-Lead Items

On a new commercial building the utility connection and the switchgear are the two items most likely to set the date, and both need to be started long before they look urgent.

A new service means a utility application, their engineering, possibly a transformer and work in the street, and a schedule that is theirs rather than the project's. On a site with no existing supply, or one needing three phase where none is available, that process can run for months.

Switchgear, panelboards and transformers are ordered rather than stocked, and commercial gear lead times have been long and unpredictable for several years. A building ready for gear that has not arrived is a stalled project, and it is one of the most common causes of a commercial program slipping.

Both can be started from a known load long before the finishes are decided, which is the argument for settling the electrical design early. Service and switchgear work covers what is involved.

Temporary Power and the Early Site

Construction power is the first electrical item on site and it is worth doing properly rather than treating as a temporary inconvenience.

A temporary service sized for what the trades will actually run, with GFCI protection throughout, distribution positioned where the work is rather than where it was convenient on week one, and enough capacity that nobody is running the site from extension leads.

On a New Hampshire winter build the temporary supply is also carrying heat: ground thaw, concrete cure, temporary heaters for drywall and finishes. That load is substantial and it is routinely underestimated, which produces a site tripping supply all winter.

The transition from temporary to permanent power needs planning too, because there is usually a period where the building is partly energized and still under construction, and the site safety arrangements have to account for that.

Rough-In, Sequencing and the Window That Closes

Rough-in is where the electrical schedule is genuinely constrained, because it happens in a window that opens and closes on somebody else's program.

Underground and in-slab work has to be in before the pour, and once concrete is down it is down. In-wall rough-in happens after framing and before insulation and drywall, sharing that window with plumbing and mechanical, all three competing for the same ceiling and wall cavities. Miss it and the work costs several times as much.

Coordination between the trades in the ceiling is the recurring conflict on commercial builds. Ductwork is large and inflexible, plumbing has a slope requirement, and electrical is the most flexible of the three, which in practice means the electrical works around them and needs to know their routes early.

What causes rework is design that is still moving during rough-in: equipment not selected, layouts changing, tenant requirements arriving late. Some of that is unavoidable, and the way to handle it is running capacity and route to a location and leaving the final detail until the information exists.

Permits, Inspections and the Certificate of Occupancy

Commercial construction is inspected at defined stages, and the sequence matters because each one gates work that follows it.

Underground before the pour, rough before it is covered, and final before occupancy. A stage covered before it is inspected has to be opened again, which is a cost nobody budgets for. The permit carries the master electrician's license, and we schedule the inspections rather than leaving them to the GC.

Requirements differ between New Hampshire and Massachusetts and between municipalities, in practice as well as on paper. A build in Nashua does not run identically to the same build in Lawrence, and knowing which applies where is part of what a licensed contractor in both states brings.

The certificate of occupancy waits on every trade's final inspection plus fire and, in food service, health. Electrical is rarely the last one outstanding, but when it is, it is usually because of something identified weeks earlier and not closed out.

Fit-Out, Equipment and the Final Connections

The last phase is where a building goes from complete to usable, and it depends on information that arrives late by nature.

Fixtures, devices, trim, the lighting and its controls, then the equipment connections once the equipment is delivered and set. On a commercial build that equipment is frequently the tenant's or the owner's rather than the contract's, and it turns up on its own schedule.

This is why the equipment schedule matters so much earlier in the program: the circuits have to be in the wall before the equipment is on site, sized from nameplates that may not exist yet. Running capacity and route to the position and leaving the connection is the standard approach. Equipment and machine connections covers the detail.

Where the building is being fitted out for a specific tenant rather than handed over as a shell, the work runs as a tenant fit-up within the larger build, which usually means two overlapping scopes and one set of inspections.

Handover, Records and the Building Afterward

What gets handed over at the end determines how manageable the building is for the next twenty years, and it is the part of a construction program most often rushed.

Accurate panel schedules, circuits identified at both ends, as-built information where the installation differs from the drawings, and the documentation for the equipment installed. A new building handed over with a generic panel schedule starts accumulating confusion immediately.

Commissioning is the other half: lighting controls set up properly rather than left at factory defaults, emergency lighting tested and recorded, generator load tested rather than just started, and equipment run under load. Controls left uncommissioned is the most common reason a new building does not deliver the savings its design promised.

Buildings we build are frequently buildings we then maintain, and a scheduled maintenance arrangement from handover means the record starts at day one rather than being reconstructed later. Low voltage and structured cabling handed over documented works the same way.