To connect safely 4 mm banana leads to CEE 3P+N+E 6h 415-volt 32-ampere power sockets. To convert CEE 3P+N+E 6h 415-volt 32-ampere power sockets into safety 4 mm banana female connections. To watch voltages of 3-phase networks with analyzers on long periods, to carry out reliable insulation tests on 3-phase networks with insulation testers. The adapter connects to CEE 3P+N+E 6h 415-volt 32-ampere power sockets to offer safety 4 mm banana female connections for the 3 phases, neutral, and PE conductors of the power sockets.