ANSI/IEEE C37.71-1984 pdf free download.IEEE Standard for Three-Phase, Manually Operated Subsurface Load Interrupting Switches for Alternating-Current Systems. 1.1 Scope ANSI/IEEE C37.71-1984 applies to three-phase, group operated, 60 Hz, subsurface, load interrupting switches with maximum ratings of 600...
ANSI Standards