Abstract: The invention pertains to a method of installing cables (2) in cable ducts (6a, 6b, 6c) using installation devices (1) propelling the cables (2) into the ducts (6a, 6b, 6c). In accordance with the invention, the installation devices (1) are powered by means of pressurized fluid (f), such as air, transported through the ducts (6a, 6b, 6c). This results in a smaller number of compressors (4) and operators being necessary. The duct in which a cable is installed and/or parallel ducts may be used for transporting the pressurized fluid (f). The feed direction of the cable () may coincide with, or be opposed to, the transport direction of the fluid (.fwdarw.). The invention further provides an installation device (1) for use in the method.