4PC/P/LV CliffCon 4 Pole Low Voltage Connector Plug
By Cliff Electronic Components (FCR2066)
MCM Part #27-9527
A range of 4-pole touchproof plug and socket power connectors which are available in Blue for low voltage and Red for high voltage. Only plugs and sockets of the same color are compatible, so red plugs cannot be plugged into blue sockets and vice versa.