Commercial Electrical Design
Expert commercial electrical design services engineered for code compliance, safety, and long-term performance.
5 Highlights on Commercial Electrical Design
- Full-scope design documentation — Kochs Electric produces single-line diagrams, panel schedules, lighting plans, power plans, and load calculations tailored to your commercial project from ground up to energization.
- NEC and AHJ compliance built in — Every design references NFPA 70, local code requirements, and authority having jurisdiction standards so your permit gets approved the first time.
- Accurate load calculations and demand analysis — We size feeders, branch circuits, and distribution boards using connected load data, demand factors, and diversity factors to prevent overloaded panels and voltage drop issues.
- Coordination with general contractors and engineers — Our electrical designers work directly alongside project managers, electrical engineers, and GCs to align drawings, submittals, and RFIs with the full construction schedule.
- Designed for real-world installation — Kochs Electric’s commercial electrical designs account for conduit routing, raceway sizing, wire pull lengths, and seismic bracing so your journeymen and foremen can install without guesswork.
Why Choose Our Commercial Electrical Design
Commercial electrical design is where a project either runs smoothly or falls apart at the rough-in stage. Kochs Electric brings qualified master electricians and experienced electrical designers to every project. We don’t hand off generic drawings. We produce construction-ready documentation that reflects actual field conditions.
Our team sizes every panel, subpanel, and distribution board to handle your connected load with room for future expansion. We specify THHN and THWN conductors, EMT and rigid conduit systems, and proper ampacity-rated wire gauges based on your voltage requirements — single-phase or three-phase.
We’ve coordinated commercial electrical designs across office buildings, retail spaces, warehouses, and light industrial facilities. We understand how to route feeders through conditioned and unconditioned spaces, how to detail firestopping at penetrations, and how to produce panel schedules that inspectors and code officials can read without questions.
Every design Kochs Electric delivers is cross-checked against NEC, NFPA 70, and local AHJ requirements before it reaches your hands. We stand behind our drawings through the permit, inspection, and commissioning phases. If an RFI or change order comes up, we respond fast and update documentation accurately.
Signs You Need Commercial Electrical Design
1. You’re breaking ground on a new commercial build: New construction requires a complete electrical design package — power plans, lighting plans, riser diagrams, and load schedules — before the AHJ will issue a permit. Without stamped, code-compliant drawings, your project doesn’t start.
2. Your existing panel is overloaded or undersized: When breakers trip repeatedly, circuits run unbalanced, or your demand load exceeds your main panel’s rated ampacity, you need a formal load calculation and redesign. Kochs Electric identifies the fault, sizes a replacement distribution board or subpanel, and produces drawings for the upgrade.
3. You’re adding equipment — motors, HVAC units, or compressors: Adding a rooftop unit, air handler, or VFD-driven motor to an existing commercial system requires branch circuit sizing, feeder extension design, and disconnect specification. Skipping the design phase leads to voltage drop, overloaded conductors, and failed inspections.
4. You’re retrofitting or upgrading an older facility: Older buildings often have aluminum wire, outdated fusible switches, or non-metallic conduit that doesn’t meet current NEC standards. A commercial electrical design retrofit identifies what needs replacement, what can be reused, and how to bring the system up to code without tearing out everything.
5. Your insurance or lender requires stamped electrical drawings: Banks, insurers, and commercial tenants frequently require code-compliant, permitted electrical documentation before closing or occupancy. Kochs Electric produces the drawings, coordinates the permit, and gets the approval documented.
Our Commercial Electrical Design Process
Step 1 — Site Assessment and Load Data Collection We visit your site, measure existing conditions, and gather connected load data for all equipment — lighting, motors, HVAC, receptacles, and specialty circuits. We document panel configurations, available fault current, and utility transformer information.
Step 2 — Load Calculation and System Sizing Our designers run load calculations using NEC demand factors and diversity factors. We size feeders, branch circuits, and overcurrent protection — breakers, fuses, and fusible switches — to match your actual demand load with code-required safety margins.
Step 3 — Drawing Production We draft single-line diagrams, panel schedules, lighting plans, power plans, and riser diagrams. Every drawing identifies conduit types, wire gauges, raceway routing, and device locations — flush-mounted, surface-mounted, or recessed.
Step 4 — Code Review and Permit Submission We review all drawings against NFPA 70 and local AHJ requirements, then submit for permit. We handle RFIs and respond to plan check comments directly.
Step 5 — Construction Support and As-Builts Kochs Electric supports your foremen and journeymen through installation, answers field questions, and produces accurate as-built drawings after commissioning.
Brands We Use
Kochs Electric specifies and works with trusted, listed, and labeled manufacturers whose products meet NEC, UL, and NEMA standards for commercial electrical systems.
- Square D
- Eaton
- Siemens
- ABB
- Hubbell
- Leviton
- Lutron
- Lithonia Lighting
- Southwire
- Atkore
Every product Kochs Electric specifies carries UL listing and meets the voltage-rated and ampacity-rated requirements for your commercial application.
Other Services
| Commercial electrical design | Commercial electrical design services | Load calculation, panel schedule, single-line diagram |
| Commercial electrical designer | Commercial electrical design company | NEC compliance, AHJ approval, permit drawings |
| Commercial electrical drawings | Commercial electrical design plans | Riser diagram, lighting plan, power plan |
| Commercial electrical load calculation | Commercial electrical system design | Demand load, feeder sizing, branch circuit design |
| Commercial electrical design contractor | Professional commercial electrical design | Electrical engineer, master electrician, code-compliant design |
FAQs About Commercial Electrical Design
What is commercial electrical design?
Commercial electrical design is the process of planning, sizing, and documenting all electrical systems in a commercial building — including power distribution, lighting, branch circuits, feeders, and overcurrent protection — before installation begins. It produces drawings like single-line diagrams, panel schedules, and lighting plans that guide installation and satisfy permit requirements.
When do you need commercial electrical design?
You need it before any new commercial construction, major renovation, equipment addition, or system upgrade. The AHJ requires permitted drawings before rough-in inspections, and lenders or insurers often require stamped documentation before project funding or occupancy.
Why does commercial electrical design matter for code compliance?
NEC and NFPA 70 set specific requirements for conductor ampacity, overcurrent protection, voltage drop limits, and raceway fill. A properly executed design catches code violations before installation — not during inspection — which saves time and avoids costly rework.
How does Kochs Electric size a commercial electrical system?
We calculate connected load for every circuit, apply NEC demand factors, and size feeders, panels, and breakers accordingly. We account for single-phase and three-phase loads, motor starting currents, available fault current, and voltage drop across long feeder runs.
Can Kochs Electric handle design for large commercial projects?
Yes. We’ve designed electrical systems for warehouses, multi-tenant office buildings, retail centers, and light industrial facilities. We coordinate with electrical engineers, general contractors, and project managers throughout design and construction.
Does Kochs Electric provide as-built drawings after installation?
Yes. After commissioning, we update all drawings to reflect actual installed conditions — conduit routing, panel configurations, circuit labeling, and device locations — so your facility has accurate documentation for future maintenance and upgrades.