The fusing factor of a fuse is determined as:

• A. Fusing factor = (Current rating of fuse) / (Fusing current)
• B. Fusing factor = √3 (Current rating of fuse) / ​(Fusing current)
• C. Fusing factor = √3 (Fusing current) / (Current rating of fuse)
• D. Fusing factor = (Fusing current) / (Current rating of fuse)