Technical Specifications
| Model | SPEC |
| NKF2-20 | 2Pole-20Amp |
| NKF2-32 | 2Pole-32Amp |
| NKF2-40 | 2Pole-40Amp |
| NKF2-63 | 2Pole-63Amp |
| NKF4-20 | 4Pole-20Amp |
| NKF4-32 | 4Pole-32Amp |
| NKF4-40 | 4Pole-40Amp |
| NKF4-63 | 4Pole-63Amp |
| Model | SPEC |
| NKF2-20 | 2Pole-20Amp |
| NKF2-32 | 2Pole-32Amp |
| NKF2-40 | 2Pole-40Amp |
| NKF2-63 | 2Pole-63Amp |
| NKF4-20 | 4Pole-20Amp |
| NKF4-32 | 4Pole-32Amp |
| NKF4-40 | 4Pole-40Amp |
| NKF4-63 | 4Pole-63Amp |