Marking the cap with a tag that informs other users that the device is undergoing repair/downtime and that the device is therefore disconnected/switched off. Information related to the disconnection (name of the responsible worker, date of completion, etc.) can also be written on this tag. A short text can be placed on the back of the tag with a description of the steps the employee must take before turning off or disconnecting the device – with his signature. By doing so, he confirms that he has performed the given steps.