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Three PhaseElectrical Solutions

Services · Design & Consulting

Expert Three-Phase Electrical System Design & Consulting

Good three-phase projects start on paper. Design and consulting work turns your operational needs into load calculations, single-line diagrams, equipment specifications and study reports that contractors can price and inspectors can approve. We help you scope that work and connect you with qualified engineering support.

Last reviewed · Published by Essential Systems

Two engineers reviewing an electrical single-line diagram on paper beside a laptop

What design and consulting covers

DeliverablePurpose
Load calculation (NEC Article 220)Sizes service, feeders and transformers for real demand plus growth
Single-line diagramOne-page map of sources, transformers, gear and protection
Short-circuit studyConfirms equipment interrupting and withstand ratings
Protective device coordinationEnsures the nearest device trips first, limiting outages
Arc flash risk assessmentIncident energy and labels per NFPA 70E / IEEE 1584
Harmonic / power quality studyAssesses VFD and non-linear load impacts (IEEE 519)
Specifications & drawingsPermit- and bid-ready documents

Typical projects

  • Bringing three-phase service to a site that currently has single-phase
  • Adding a production line, chiller plant or EV charging
  • Replacing obsolete switchgear or motor control centers
  • Standby power: generator sizing and transfer schemes
  • Correcting chronic tripping, overheating or power quality problems

What to have ready

  • Utility bills (12 months) and any interval demand data
  • Existing drawings or panel schedules, even if outdated
  • Equipment list with nameplate data for major loads
  • Photos of the service, main gear and problem areas
  • Planned changes and target timeline

Why it pays

Spending on design up front avoids oversized gear, change orders, failed inspections and equipment with too low a fault rating. It also gives you accurate documentation for the life of the facility. Explore related services on the Services page.

Next step

Start with a conversation

Tell us what you're planning — a new building, an expansion, a new production line — and we'll help define the design scope.

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