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Circuit Breaker Size CalculatorWhen you install an electrical appliance (e.g. washer or dryer), the question arises: "What circuit breaker size does a washer need?" Circuit breaker size calculator is an easy-to-use online tool to estimate the breaker size you need to protect your electrical appliances from an overload. A circuit breaker is rated in amperes, and the rating tells us how much current can safely flow through the breaker without causing it to trip. Generally, you should size a breaker for 125% of the load (25% safety factor). This calculator allows you to input up to 5 different electrical appliances to estimate the total load the breaker will need to protect. To calculate the total load this tool uses the following equations:
where: I — resulting current; W — appliance's wattage; V — voltage; PF — power factor. Please use this calculator as a starting point only! Allow a licensed electrician to install the correct circuit breaker size for your appliances! |
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