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How to Calculate Electrical Load
Formula
Electrical load calculation determines the total power demand to properly size breakers, panels, and wiring. Total watts divided by voltage gives the amperage draw.
NEC code requires breakers to be rated at 125% of continuous load. This calculator rounds up to the nearest standard breaker size.
Common use cases:
- Electrical panel sizing
- Circuit breaker selection
- Monthly electricity budgeting
Frequently Asked Questions
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