Abstract: An arc welding kit comprising a torch head, a combined source of electric current and of fluid for welding and a composite cable connectible between the fluid/current source and the torch head by means of coupling connectors.The upstream extremity of the composite cable has a coupling connector identical to that of the torch head whereas its downstream extremity has a coupling connector identical to that of the combined source. This enables two or more such cables to be connected in series to extend the range of the torch. Furthermore, an elbow comprising the same coupling connectors may be placed between the torch head and the composite cable, to turn the torch head through a desired angle.The invention is particularly applicable to plasma cutting torches ignited by short-circuiting.