A suspension assembly for suspending a pendant luminaire from a ceiling, the suspension assembly comprising: a suspension element to be attached to the ceiling, comprising an external thread and being configured for fixing a cable or cord of the pendant luminaire, wherein the suspension element comprises a longitudinal channel provided for receiving the cable and a longitudinal opening to provide for insertion of the cable; a ceiling cup; and a fixing element comprising a threaded element with an internal thread corresponding to the external thread of the suspension element, the fixing element being configured such that it fixes the ceiling cup against the ceiling when attaching the fixing element to the suspension element by mating the internal thread of the threaded element with the external thread of the suspension element; wherein the threaded element comprises a longitudinal opening so that the cable can be inserted into a longitudinal channel formed inside the threaded element; wherein the fixing element comprises two separate parts (14; 15) that are releasably attachable to each other or two parts that are connected to each other via a hinge; characterized in that the threaded element is arranged only on one of the two separate parts (14; 15) of the fixing element; and in that the ceiling cup and the fixing element are configured such that when mating the internal thread of the threaded element with the external thread of the suspension element and in the mounting position in which the fixing element fixes the ceiling cup against the ceiling, the fixing element is rotatable relative to the ceiling cup in at least one direction of rotation. a suspension element to be attached to the ceiling, comprising an external thread and being configured for fixing a cable or cord of the pendant luminaire, wherein the suspension element comprises a longitudinal channel provided for receiving the cable and a longitudinal opening to provide for insertion of the cable; a ceiling cup; and a fixing element comprising a threaded element with an internal thread corresponding to the external thread of the suspension element, the fixing element being configured such that it fixes the ceiling cup against the ceiling when attaching the fixing element to the suspension element by mating the internal thread of the threaded element with the external thread of the suspension element; wherein the threaded element comprises a longitudinal opening so that the cable can be inserted into a longitudinal channel formed inside the threaded element; wherein the fixing element comprises two separate parts (14; 15) that are releasably attachable to each other or two parts that are connected to each other via a hinge; characterized in that the threaded element is arranged only on one of the two separate parts (14; 15) of the fixing element; and in that the ceiling cup and the fixing element are configured such that when mating the internal thread of the threaded element with the external thread of the suspension element and in the mounting position in which the fixing element fixes the ceiling cup against the ceiling, the fixing element is rotatable relative to the ceiling cup in at least one direction of rotation.