電線の太さの選択
電圧降下の計算式（簡易）
単相２線式
三相３線式（許容電圧降下率３%、降下電圧６V）
電線の選択（単位：mm2）
| モーター出力 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0.75 | 1.5 | 2.2 | 3.7 | 5.5 | 7.5 | 11 | 15 | 19 | 22 | 37 | ||
| 電線(キャブタイヤ・ ケーブル)の 長さ(m) | 10 | 0.75 | 1.25 | 2.0 | 3.5 | 5.5 | 8.0 | 14.0 | 22.0 | 30.0 | 38.0 | 60.0 |
| 20 | 0.75 | 1.25 | 2.0 | 3.5 | 5.5 | 8.0 | 14.0 | 22.0 | 30.0 | 38.0 | 60.0 | |
| 30 | 0.75 | 1.25 | 2.0 | 3.5 | 5.5 | 8.0 | 14.0 | 22.0 | 30.0 | 38.0 | 60.0 | |
| 40 | 0.75 | 2.0 | 3.5 | 3.5 | 5.5 | 8.0 | 14.0 | 22.0 | 30.0 | 38.0 | 60.0 | |
| 50 | 1.25 | 2.0 | 3.5 | 5.5 | 8.0 | 14.0 | 22.0 | 22.0 | 30.0 | 38.0 | 60.0 | |
| 60 | 1.25 | 3.5 | 3.5 | 5.5 | 8.0 | 14.0 | 22.0 | 22.0 | 30.0 | 38.0 | 60.0 | |
| 70 | 2.0 | 3.5 | 5.5 | 8.0 | 14.0 | 14.0 | 22.0 | 30.0 | 30.0 | 38.0 | 60.0 | |
| 80 | 2.0 | 3.5 | 5.5 | 8.0 | 14.0 | 14.0 | 30.0 | 30.0 | 38.0 | 50.0 | 80.0 | |
| 90 | 2.0 | 3.5 | 5.5 | 8.0 | 14.0 | 22.0 | 30.0 | 38.0 | 50.0 | 50.0 | 80.0 | |
| 100 | 2.0 | 5.5 | 5.5 | 14.0 | 14.0 | 22.0 | 30.0 | 38.0 | 50.0 | 60.0 | 100.0 | |
| 110 | 2.0 | 5.5 | 8.0 | 14.0 | 22.0 | 22.0 | 38.0 | 38.0 | 50.0 | 60.0 | 100.0 | |
| 120 | 3.5 | 5.5 | 8.0 | 14.0 | 22.0 | 22.0 | 38.0 | 38.0 | 60.0 | 80.0 | 125.0 | |
| 130 | 3.5 | 5.5 | 8.0 | 14.0 | 22.0 | 30.0 | 50.0 | 50.0 | 60.0 | 80.0 | 125.0 | |