Breaker Sizing Calculator
Determine circuit breaker size for continuous/non-continuous loads
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How to Use This Calculator
Load.
Type.
Get Breaker.
Understanding Breaker Sizing Calculations
125% rule.
Continuous load.
Trip curves.
Coordination.
Formula & Calculations
Load x 1.25 (Continuous)
Key Factors to Consider
Wire size match
Temp rating
Start-up current
Panel capacity
Frequently Asked Questions
115A vs 20A?
Match wire (14 vs 12).