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400V Red 3 Phase Plugs and Sockets

Red 400V three phase industrial plugs, sockets and connectors to IEC 60309, in 4 and 5 pin versions.

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Buying guide

Red marks 400V three phase in the IEC 60309 colour code. A 5 pin (3P+N+E) plug carries the neutral for equipment that needs it; a 4 pin (3P+E) plug has three phases and earth only, for loads such as motors with no neutral.

Match the current rating and pin configuration of plug and socket - they will not mate otherwise.

Questions

4 pin or 5 pin?
Use 5 pin (3P+N+E) when the equipment needs a neutral, for example for single phase controls; 4 pin (3P+E) for three phase loads with no neutral.
Which IP rating?
IP44 suits indoor and sheltered use. IP67 plugs and sockets are watertight when mated, for outdoor and washdown areas.
What is an interlocked socket?
A socket with a switch that must be off before the plug can be inserted or withdrawn, so the plug never breaks a live load.