The MAC 2000 E requires two 20 A T (time delay) fuses when operated at the 100 or 120 volt settings. (It requires 15 A T fuses when operated at the 208, 230, or 250 volt settings.) Two 20 amp fuses, P/N 05020040; “Fuse, 20 A T, 6.3 x 32 mm”; are now included with the product.