How is load calculated for the first 3,000 watts?

The correct calculation for load generally stipulates that the first 3,000 watts of demand should be taken at 100% to accurately reflect the usage capacity of electrical systems. This is part of the demand calculations used by electricians and inspectors to ensure that systems are adequately sized to handle the needs of a residence.

For electrical demand calculations, the first segment of demand is typically calculated at full capacity to ensure safety and efficiency. By considering the full 3,000 watts, it allows for a reliable assessment in load calculations, supporting the overall integrity of the electrical system being designed or improved.

The other options propose percentages that are not in line with standard practices in load calculations. Using lower percentages could underestimate the actual demand, which can result in insufficient wiring or breaker ratings, leading to potential overloading and safety hazards. Therefore, the approach of calculating the first 3,000 watts at 100% is critical for ensuring that electrical installations are compliant and safe.