Commercial Load Calculation Handbook: A Practical Guide to Service Entrance Sizing, Feeder Design, and Demand Factor Calculations for Commercial Buildings

Are you still losing hours trying to figure out why your commercial service entrance calculation keeps coming out wrong?

The Commercial Load Calculation Handbook is the only NEC-based, step-by-step reference that walks electrical contractors, engineers, and licensing exam candidates through every commercial load category in one complete system.

Built entirely on the 2023 National Electrical Code, it covers commercial load calculation, service entrance sizing, feeder design, and demand factor methods for every occupancy you will encounter on the job or on the exam.

Here is exactly what you get inside:

• NEC Article 220 service entrance sizing: the complete 8-step worksheet, every demand factor cited
• Lighting load calculation using NEC Table 220.12 unit loads and NEC Table 220.42 tiered demand factors
• Commercial receptacle loads: 180 VA per outlet rule, NEC Table 220.44, dedicated equipment circuits
• HVAC and motor loads: rooftop units (MCA method), chilled water plants, NEC 220.50 largest-motor rule
• Commercial kitchen demand factors: NEC Table 220.56 cooking equipment calculation, step by step
• EV charging load calculation under NEC 220.57: the 2023 NEC demand factor most engineers miss
• Data center and server room sizing using Power Usage Effectiveness (PUE)
• Emergency and standby power: NEC Articles 700, 701, 702 with generator sizing
• 56 fully solved worked examples, 98 practice problems, all answers included
• Complete mixed-use building case study: floor plan to final service size

If you size commercial electrical services, prepare for the Master Electrician exam, or review electrical design submittals, this handbook gives you the exact process to get it right every time.

Add it to your reference library today and never second-guess a commercial service calculation again.