The robust extension cable with rubber coupling for simultaneous operation of several devices (e.g. radio and drill) with self-closing hinged covers for high mechanical stress on construction sites, commercial and private use with practical integrated fastening device is suitable for easy use indoors and outdoors thanks to IP 44 (protected against foreign bodies and splash water). The extension cable with triple rubber coupling also impresses with the following features: Robust and flexible 10 m extension cable for high mechanical loads. 3 junction boxes with self-closing hinged covers. Protected against foreign bodies and splash water. Easy handling thanks to integrated suspension device.