Commercial Wiring & Power Distribution in St. Charles & St. Louis County
Three-phase power installation, high-voltage systems, and power distribution for manufacturing, retail, and office environments throughout St. Louis and St. Charles County.
MO License #20250016884.9 Star Average. 410+ Reviews.In Business Since 2010Cottleville, MO
Common Reasons People Book This
What It Costs
An estimate, not a quote. Estimates for installs and upgrades are free; your exact flat price comes after we see the job, and it's the price you pay.
Typical Scope
- Three-phase power systems
- High-voltage installations
- Power distribution panels
- Motor and equipment circuits
- Bus duct systems
- Transformer installations
- Load balancing
- Power factor correction
From First Visit to Final Inspection
Typical job: Varies by scope.
Load Analysis & Planning
We inventory all existing and planned equipment: motors, HVAC systems, machinery, computers, and lighting. Using NEC load calculations, we determine total connected load, demand factors, and required service capacity to ensure your system handles current needs plus future growth.
Distribution System Design
Our engineers design the complete power distribution system: main service entrance, distribution panels, sub-panels, and branch circuits. We plan for balanced loads across phases, appropriate wire sizing, and code-compliant installation methods.
Utility Coordination
For new services or upgrades, we coordinate directly with Ameren. This includes submitting service applications, scheduling transformer installations, and ensuring their requirements align with your project timeline. We attend the utility site meeting on your behalf.
Permit & Engineering Submittal
We prepare permit applications with one-line diagrams, load calculations, and panel schedules. For larger installations, we coordinate with your engineer of record or provide PE-stamped drawings as required by the jurisdiction.
Equipment Procurement
We order switchgear, panels, transformers, and wire from commercial electrical distributors. For custom equipment (paralleling switchgear, specialty panels, or long-lead items), we coordinate directly with manufacturers on specifications and delivery.
Infrastructure Installation
Our crews install conduit runs, cable trays, and wire pulls according to the engineered drawings. For three-phase systems, we use proper color coding and phase rotation. All connections are torqued to manufacturer specifications and documented.
Panel Termination & Labeling
We terminate all feeders and branch circuits at panels, install breakers, and create accurate panel schedules. Every circuit is labeled at the panel and at the device for easy identification during maintenance or troubleshooting.
Testing & Commissioning
Before energizing, we perform insulation resistance testing on all feeders and verify proper phase rotation. After power-up, we test each circuit, verify voltage at all points, and check for proper grounding. You receive complete documentation including as-builts and test reports.
What Homeowners Say About Our Work
Reviews that mention this work first.
Al T.
bbb
Monte M.
Jack S.
4.9 Star Average. 410+ Reviews. Google, Facebook, BBB and Angi.
Fully licensed and insured in Missouri:MO State License #2025001688,St. Charles County #E25-000008,St. Louis County #ES4501.Lifetime workmanship warranty on installed work.
Licensed Electricians Across St. Charles & St. Louis Counties
Flat-rate pricing before work begins, from an office in Cottleville.
First Choice Electric
5377 State Route N. Suite 437, Cottleville, MO 63304
Mon-Fri 8:00 AM - 4:00 PM
Commercial Wiring & Power Distribution Near You
By county
By city
- Commercial Wiring & Power Distribution in Chesterfield
- Commercial Wiring & Power Distribution in Ballwin
- Commercial Wiring & Power Distribution in Wildwood
- Commercial Wiring & Power Distribution in Creve Coeur
- Commercial Wiring & Power Distribution in Town and Country
- Commercial Wiring & Power Distribution in Manchester
- Commercial Wiring & Power Distribution in Kirkwood
- Commercial Wiring & Power Distribution in Webster Groves
Questions About Commercial Wiring & Power Distribution
What's the difference between single-phase and three-phase?
Three-phase provides more power capacity and efficiency for larger motors and equipment. Most commercial facilities need three-phase.
Can you upgrade our service size?
Yes. We can upgrade commercial services in coordination with Ameren.
Do you work with manufacturing equipment?
Yes. We install power for CNC machines, compressors, welders, and other industrial equipment.
What about temporary power?
Yes. We can set up temporary power for construction, events, or equipment testing.
How do you minimize downtime?
We plan carefully, work after hours when needed, and coordinate shutdowns to minimize impact.
Related Services
Guides From Our Electricians
Get Your Flat Price for Commercial Wiring & Power Distribution
Most estimates booked within 1-3 business days.