⚡ NEC Article 220 Commercial 3-Phase 480V/208V Service Sizing

Commercial Electrical Service Panel Load Calculator

Calculate total connected VA and demand loads for commercial buildings (lighting 3.5 VA/sqft, HVAC 100% largest motor + 80% continuous, receptacle demand factors under NEC Article 220) to size 3-phase main distribution panels (400A to 3,000A).

1. Project & Operating Inputs

Total Commercial Building Area (Square Feet)

Connected Mechanical HVAC Load (kVA)

Turnkey Service Upgrade Quote ($)

Switchgear, Copper Feeder & Labor Cost ($)

2. Financial Breakdown & Yield

NEC ARTICLE 220 PANEL DEMAND LOAD

Turnkey Job Gross Profit

Electrical Contractor Margin

0.0%

Gross Revenue / Bill

Total Project CapEx

Operating / Material Cost