Appendix 10.5 Mains Connections 10.5.1 Connection socket of ISG3410-400V Allocation of the CEE socket Pin name Pin designation Wire colour L1 Phase L1 Brown L2 Phase L2 Black/ grey L3 Phase L3 Black N Neutral Blue PE Ground Green-yellow The nominal voltages between the phases are 3x400V (-10/ +10%) Measurement Voltage (VAC) between the pins N L1 PE L1 230 N L2 PE L2 230 N L3 PE L3 230 L1 L2 400 L1 L3 400 L2 L3 400 Further hints: Connecting the protected earth PE and connecting the neutral N is essential! If an earth-leakage circuit breaker (GFI, GFCI) is used for the protection of the CEE-socket, it must be 4-polar. October 2015 ISG3410 53