Panelboards, busways, feeders, transformers, and grounding. The distribution scope between your service entrance and your loads — built to actually run.
Distribution is the scope most often shortchanged in commercial construction. Service entrance and switchgear get attention because they’re expensive and visible. Lighting and devices get attention because they’re what occupants interact with. The feeders, panels, and busways in between — the actual distribution — get drawn on a one-line and bid out. Then the project finds out at startup that the panel schedules don’t reflect what got installed, or that voltage drop on a long feeder is exceeding NEC 215.2 recommendations, or that the panel locations make breaker access a permit-stopping issue.
We treat distribution as the load-bearing scope it actually is. Real conductor sizing, real voltage drop calculations, real panel and feeder layout that accounts for future expansion. The work that doesn’t show up in the marketing photos but determines whether the building works in year 5.
Main distribution panels, sub-panels, branch panelboards, and lighting/appliance panelboards. NEMA 1, 3R, 4, and 4X enclosure ratings as application requires. Square D, Eaton, Siemens, and ABB platforms.
Feeder sizing per NEC Article 215 with voltage drop calculations to keep service quality intact at long runs. Conduit, cable tray, and busway routing. Conductor selection (THHN/THWN-2, XHHW-2) and aluminum versus copper economics where it matters.
Indoor busway installations for high-amperage feeders and bus duct for data center white space. Plug-in busway for flexible distribution in manufacturing and warehouse environments. Eaton Pow-R-Way, Square D I-Line, and Siemens Sentron platforms.
Step-down distribution transformers from 15kVA through 1,500kVA. Dry-type for indoor applications, liquid-filled (FR3 less-flammable fluid where appropriate) for higher kVA outdoor pads. K-rated transformers for harmonic-heavy loads.
Service entrance grounding per NEC Article 250, equipment grounding, ground ring installations, and ground-fault protection. Isolated grounding where the application requires (data center white space, healthcare critical care). IEEE 142 and IEEE 1100 references.
Surge protective devices at service entrance, distribution panels, and sensitive equipment per UL 1449. Power quality monitoring and transient mitigation. Harmonic filters and active power factor correction where motor or VFD load drives it.
Send us the one-line and load schedule. We’ll come back with pricing and a constructability review.