← 所有工具电压降计算器
根据线径、距离和电流估算电路中的电压降。
Electricity isn't perfectly efficient; as current travels through a wire, it meets resistance, causing some of the energy to be lost as heat. This loss results in a 'Voltage Drop' at the far end of the cable. For long wire runs—like powering a detached garage or a backyard shed—this drop can be significant, causing motors to burn out or lights to flicker. Our Voltage Drop Calculator helps you determine if your chosen wire gauge (AWG) is sufficient for the distance and current load of your project, ensuring your electrical installation is both safe and code-compliant.
工作原理
This tool uses the standard resistance values for American Wire Gauge (AWG) copper conductors. It calculates the total resistance of the one-way distance (multiplied by 2 for the complete circuit) and applies Ohm's Law (V = I × R) to find the voltage lost across that resistance.
计算示例
1. **Long Run**: 120V, 15A, 100ft on 14 AWG = **~7.5V loss (6.3%)**.
为什么在日常生活中使用这个工具？
专业级电气安全。对于为独立建筑或户外设备供电的任何人来说，这项服务都是一项至关重要的检查，可帮助您选择正确的材料以防止火灾隐患和设备损坏。 专业级电气安全。 对于为独立建筑或户外设备供电的任何人来说，这项服务都是一项至关重要的检查，可帮助您选择正确的材料以防止火灾隐患和设备损坏。
提示
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