Hi Guys,
The highest current I saw being drawn by the AZ EQ6, granted not the same as your model, was 3.48 A with an
unloaded mount slewing, at speed 9 in the video linked below. You might need to consider some more headroom with the fuse or better yet measure the actual current being drawn with the mount fully loaded with a scope/etc, and then add an appropriate safety factor, perhaps 50%.
Best
JA