Hi all, before I request any fuse application notes, let me ask this question: is there any simple rule for the fuse rating in the primary winding of mains transformer, like certain multiple of the nominal primary current ? And what type of fuse is suggested, the F or T or does not matter ? TIA -------------------------------------------- Josef Hanzal Vojanova 615 phone/fax: +420-311-24433 266 01 Beroun euroclass@pha.pvtnet.cz Czech Republic --------------------------------------------