ISO 1724:2003

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ISO 1724:2003 is an international standard that defines the requirements for 7-pole connectors used in the electrical connection between towing and towed vehicles with a 12V nominal supply voltage. The standard specifies the dimensions, contact allocation tests, and requirements to ensure interchangeability of these connectors. It essentially sets the rules for how these connectors should be designed and tested to guarantee a reliable and consistent electrical connection.