Phoenix Contact 3245053 To securely fix the neutral busbar in place, support brackets must be placed at the start and end of each terminal strip as well as every 20 cm along longer strips, starting with a search for corresponding brackets on Phoenix Contactcontact.com/products. For disconnection of neutral conductors, nominal voltage is 400 V and nominal current is 76 A, requiring screw connections with rated cross sections ranging from 6 to 25 mm2, mounted using types NS35/7.5 or NS35/15, and identified by a blue color.