Industrial plugs and socket-outlets.

Industrial socket-outlets are used where 16 A household socket-outlets cannot cope and offer no protection against wrong connection: welding machines, batching plants, tower cranes, site distribution boards, stages and event venues. The EN 60309-2 standard defines a set of identifying features so that plugs and socket-outlets of different voltages cannot be connected to each other.

Select on four parameters and state all four in the bill of quantities: rated current, number of poles, clock-hour position and IP rating. The clock-hour position is the keyway locating the earth contact — a 6h plug cannot be inserted into a 3h socket-outlet. Housing colours also follow the standard: blue for 230 V, red for 400 V.

• EN 60309-2 (CEE standard)
• State current, poles, clock-hour position and IP rating
• Blue for 230 V, red for 400 V

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