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ISO 1724 4th Edition, November 1, 2003
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Road vehicles Connectors for the electrical connection of towing and towed vehicles 7-pole connector type 12 N (normal) for vehicles with 12 V nominal supply voltage
Additional Comments: ENGLISH
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This International Standard specifies the dimensions of, and contact allocation tests and requirements for, 7-pole connectors of type 12 N for the electrical connection of towing and towed vehicles with 12 V nominal supply voltage, thus ensuring interchangeability.

NOTE For new developments and where more than 7 poles are required, as an alternative to the use of the 7-pole connector in accordance with this International Standard and ISO 3732, the use of the 13-pole connector in accordance with ISO 11446 may be required.