Identification of fuses - tpub A 3AG fuse is a glass-bodied fuse, 1/4 inch X 1 1/4 inches (6 millimeters X 31.8 millimeters) and has a standard time delay rating. Following the style designation is a number that is the current rating of the fuse (1). This could be a whole number, a fraction, a whole number and a fraction, a decimal, or a whole number and a decimal. Electrical Abbreviations - archtoolbox Electrical Abbreviations. The list of abbreviations used in a set of engineering drawings varies from office to office. Be sure to check the front section of the drawing set for the abbreviations used within. Help make archtoolbox better. Electric Symbols on Blueprints - House Plans Helper Electric Symbols on Blueprints. If you want to make sense of electric symbols on your blueprints then you’ve come to the right place. The placement of the outlets for all the electrical items in your home can have a significant impact on the design of your home. If you'd like a free pdf of all the blueprint and floor plan symbols go ahead and sign up below. Pearson Wiring Schematics and Circuit Testing Flashcards Two technicians are discussing finding a short to ground using a test light. Technician A says that the test light, connected in place of the fuse, will light when the circuit that has the short is disconnected. Technician B says that the test light should be connected to the positive (+) and negative (-) terminals of a battery during this test.