N-isolating terminal, installation instructions: To ensure the N busbar is securely fixed, support blocks must be placed at the beginning and end of each terminal block and every 20 cm for longer terminal blocks., Nominal voltage: 500 V, Nominal current: 68 A, Push-in connection, 1st level, Rated cross-section: 16 mm², Cross-section: 0.5 mm² - 16 mm², Mounting type: NS 35/7.5, NS 35/15, Color: blue