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Calculates voltage loss in electrical cables due to resistance. High losses reduce efficiency and can prevent motor starting.
공식
Formula: voltage drop = (2 × length × current × resistance) ÷ 1000
단계별 가이드
- 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
풀어진 예시
입력
100A, 50ft, 10 AWG
결과
3.2V drop
피해야 할 일반적인 실수
- ✕Using undersized wire to save cost
- ✕Not accounting for temperature derating
자주 묻는 질문
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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