Guides: load-calculation
Load calculation guides provide step-by-step methods for determining electrical demand in industrial facilities. Accurate load calculations are critical for proper equipment sizing, code compliance, and cost-effective electrical system design.
About This Topic
Load calculation guides provide step-by-step methods for determining electrical demand in industrial facilities. Accurate load calculations are critical for proper equipment sizing, code compliance, and cost-effective electrical system design.
Recommended Learning Path
- Understand diversity factors and demand calculations
- Learn how to group loads and apply appropriate factors
- Calculate total connected and diversified loads
- Size breakers, conductors, and transformers based on load
- Review real-world case studies and common mistakes
Related Calculators
Use these professional calculators to apply the concepts covered in the load-calculation guides:
Factory Load Calculator
Determine total electrical load, current, and breaker ratings for industrial facilities.
Use ToolTransformer Size Calculator
Calculate recommended transformer kVA rating based on load and power factor.
Use Tool3-Phase Power Calculator
Calculate three-phase current, kW, and kVA for industrial electrical systems.
Use ToolAll Articles
Browse all 18 guides covering load-calculation topics:
Industrial Load Calculation Formula (Factory kW → kVA → Amps)
Industrial load calculation formula: factory kW → diversity → kVA → amps. Free step-by-step examples—open the factory load calculator.
Read Full ArticleHow to Calculate Transformer Rating for Your Load
Size distribution transformers in kVA: gather loads, apply diversity and power factor, add margins, pick standard kVA—includes 3-phase formulas, a worked example, and links to deeper sizing guides.
Read Full ArticleTransformer Sizing (kVA Formula — Free Guide with Examples)
Transformer sizing: kVA = kW ÷ PF with free examples and standard size tables. Calculate margin, pick catalog kVA, and link to the sizing calculator.
Read Full ArticleIndustrial HVAC Capacity Formula (Plant Cooling & Heating)
Industrial HVAC capacity formulas for plant cooling and heating loads. Free step-by-step examples—verify with the HVAC capacity calculator.
Read Full ArticleHVAC Capacity Calculation Examples (Tons & BTU/h)
HVAC capacity calculation examples for offices and plants—not full Manual J software. Free worked tons/BTU/h steps; use the HVAC size calculator next.
Read Full ArticleFactory Load for Plants (Diversity & Equipment Sizing)
Factory load for industrial plants: diversity, demand, and safety margin in practice. Free manufacturing examples—use the factory load calculator next.
Read Full ArticleTransformer Sizing for Industrial Facilities: Complete Selection Guide
Size transformers correctly for industrial facilities. Complete guide covering load assessment, kVA calculation, and safety margins for manufacturing plants.
Read Full ArticleUPS Sizing for Factories (kVA & N+1)
UPS sizing for factories: critical kW → kVA, motor-start allowance, and N+1 worksheet. Free industrial examples—not a battery Ah-only guide.
Read Full ArticleFactory Load Mistakes (Not the Formula Guide)
Factory load calculation mistakes that cost capital: connected vs demand, wrong PF, and diversity errors. Free audit examples—formula steps live on the how-to guide.
Read Full ArticleFactory Load vs Transformer Size (e.g. 500 kW → kVA)
Factory load vs transformer size: convert demand kW to kVA with PF (e.g. 500 kW @ 0.85 → ~588 kVA). Free relation guide + calculator links.
Read Full ArticleFactory Load Expansion Planning: Spare kVA & MCC Headroom
Plan electrical expansion with spare kVA bands, 1.25× headroom, and MCC slot map—numeric retrofit vs greenfield example. Free planning formula.
Read Full ArticleCut Factory Load 10–20% Without New Equipment
Reduce factory load 10–20% without buying gear: scheduling, diversity, idle shutdown. Free tactics with factory load calculator checks.
Read Full ArticleConnected vs Demand Load (682 kW → 491 kW Example)
Connected vs demand load: 682 kW nameplate vs 491 kW peak—pick the right number for transformer & mains. Free formula example + factory load calculator.
Read Full ArticleDiversity Factor Formula (682÷491=1.39) + Table
Diversity factor formula & table: 682÷491=1.39 coincident example. Free factory guide—open the load calculator for demand steps.
Read Full ArticleFactory Load Safety Margin (15–25%)
Factory load safety margin (not financial margin of safety): when to use 15%, 20%, or 25%. Free examples—apply in the factory load calculator.
Read Full ArticleWhy Breakers Trip on Factory Load (7 Causes)
Why breakers trip on factory load: inrush, diversity, PF, and cable mistakes. Free industrial causes with calculator links.
Read Full ArticleUPS Sizing (Free Guide — kW/kVA, Runtime, Battery & Redundancy)
UPS sizing: match kW/kVA to load, runtime, and battery needs with free factory examples. Step-by-step guide plus UPS load, capacity, and battery calculators.
Read Full ArticleLoad Factor Formula: Peak vs Average kW
Load factor formula = average kW ÷ peak kW. Free factory example from utility kWh bills—improve LF without confusing diversity or connected load.
Read Full Article