Electrical Load Calculation Form Template
Effortlessly calculate power requirements with this simple tool
Calculating the right electrical load can be overwhelming, especially when precision is essential. This template helps electricians and engineers accurately determine the power needed for devices, ensuring safety and compliance. With concrete benefits like easy integration with existing systems, reduced calculation time, customized reporting, and enhanced clarity for clients, you can streamline your workflow significantly. Try out the live template to see how it fits your needs.
When to use this form
Use this form when you need to size service, feeders, or panels for a new build, tenant fit-out, or a retrofit that adds HVAC, kitchen equipment, EV chargers, or solar backfeed. It helps contractors, engineers, and facility managers capture loads by circuit, apply demand factors, and document assumptions for plan review or utility coordination. For panel details and ratings, pair it with the Electrical panel inspection checklist form. If you need a review trail before sign-off, add a final pass with the Quality control inspection form. The outcome: a clear, defensible load summary that reduces change orders and speeds approvals.
Must Ask Electrical Load Calculation Questions
- What is the project type, area served, and service voltage?
This defines which code rules and demand criteria apply and guides equipment selection. Clear context prevents misapplied factors and saves rework.
- List each connected load by circuit with rating (kW/kVA), phase, and duty cycle.
Circuit-level data makes the sum and demand calculation accurate and review-ready. It also speeds troubleshooting if breakers trip or loads change later.
- Which demand or diversity factors are you applying for each load category?
Stating factors shows how you reduce connected load to design load, avoiding over- or under-sizing. It also makes the math transparent for reviewers and utilities.
- What are the existing service size, main OCPD, feeder sizes, and recorded peak demand (if retrofit)?
Comparing calculated demand to existing capacity prevents overload and nuisance trips. If you note issues (hot spots, corrosion, labeling), document them with a Defect inspection report form.
- Identify the largest motor (HP/kW), continuous loads, and planned future capacity margin (%).
These values drive 125% continuous-load sizing and the largest-motor adder used by many codes and utilities. Planning margin now helps avoid costly service upgrades later.
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