NOTE 1—Clearance for mating parts. NOTE 2—Dimensions mm/in; mm . inNOTE 3—∆–Alphabetical dimensional identification. NOTE 4—The diameter of the shielded portion shall at no point be less than the largest diameter of the insulated portion except for bushings that have internal shielding. Figure 13 —600 A deadbreak interface no. 1, 21.1 kV