19.12 If safety of the appliance depends upon the operation of a miniature fuse-link complying with IEC 60127 during any of the fault conditions specified in 19.11.2, the test is repeated but with the miniature fuse-link replaced by an ammeter. If the current measured– does not exceed 2,1 times the rated current of the fuse-link, the circuit is not considered to be adequately protected and the test is carried out with the fuse-link short-circuited;– is at least 2,75 times the rated current of the fuse-link, the circuit is considered to be adequately protected;– is between 2,1 times and 2,75 times the rated current of the fuse-link, the fuse link is short-circuited and the test is carried out• for the relevant period or for 30 min, whichever is the shorter, for quick acting fuse- links;• for the relevant period or for 2 min, whichever is the shorter, for time lag fuse-links.NOTE 1 In case of doubt, the maximum resistance of the fuse-link has to be taken into account when determining the current.NOTE 2 The verification whether the fuse-link acts as a protective device is based on the fusing characteristics specified in IEC 60127, which also gives the information necessary to calculate the maximum resistance of the fuse-link.NOTE 3 Other fuses are considered to be intentionally weak parts in accordance with 19.1.