Phoenix 3034015 To secure the neutral busbar, supports must be installed at the start and end of each terminal strip as well as every 20cm along longer strips. The circuit specifications include a nominal voltage of 400V, an operating current of 110A, and various connection types such as special and hybrid setups with right-hand connections. The required mounting type is NS 35/7.5 or NS 35/15, with blue color designation for the busbar.