Phoenix Contact 3038451 To ensure safe operation, disconnect the terminal block and verify that the total current of all connected conductors does not exceed the maximum load current, as indicated by the type of plug used. The maximum allowed current is 20 A for a nominal voltage of 400 V, with a specific cross-sectional area range of 0.08 mm² to 4 mm², and can be secured using either an NS 35/7.5 or NS 35/15 mounting type, characterized by a gray color.