| Charging circuit without load | Standard current | 10 A or less |
| Standard voltage | 13.2 to 14.8 V | |
| Charging circuit with load | Standard current | 30 A or more |
| Brush length | Standard length | 10.5 mm (0.413 in.) |
| Minimum length | 4.5 mm (0.177 in.) | |
| Generator rotor assembly resistance | Slip rings | 2.3 to 2.7 Ω at 20 °C (68 °F) |
| Slip ring - Rotor | 10 kΩ or higher | |
| Slip ring | Standard diameter | 14.2 to 14.4 mm (0.559 to 0.567 in.) |
| Minimum diameter | 14.0 mm (0.551 in.) |