NON cartridge fuse emergency kit. Contains (1) NON-20, (2) NON-30, (1) NON-40, (2) NON-60, and a fuse tester. NON fuses are used to protect motors and branch circuits where higher amperage or voltage ratings are required. Cartridge fuses are used extensively in industrial, agricultural, and commercial applications as well as residential fuse panels, air conditioning units, pumps, appliances, and other equipment.