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Calculates voltage loss in electrical cables due to resistance. High losses reduce efficiency and can prevent motor starting.
公式
Formula: voltage drop = (2 × length × current × resistance) ÷ 1000
ステップバイステップガイド
- 1Current in amperes and cable length
- 2Wire gauge (affects resistance)
- 3Formula: voltage drop = (2 × length × current × resistance) ÷ 1000
- 4Typical target <3% for power, <5% for control
- 5Higher gauge wire reduces drop exponentially
解いた例
入力
100A, 50ft, 10 AWG
結果
3.2V drop
避けるべきよくある間違い
- ✕Using undersized wire to save cost
- ✕Not accounting for temperature derating
よくある質問
Why does voltage drop matter?
Reduces equipment voltage, increases losses, causes motors to start slowly, reduces efficiency.
How much does proper wire size cost vs. undersized?
Proper size costs 10-20% more initially but saves 5-10% energy costs over life.
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