- Milbank® Meter Socket, 1-Position, 600 VAC, 200 A, 3 ph, 60 Hz Frequency, Overhead/Underground Feed, 7 Jaws, 6 AWG to 350 kcmil Wire, Small Closing Plate Hub, Ringless Cover, Lay-in Line Side/Lay-in Load Side Terminal, Surface Mounting, NEMA 3R Enclosure, 4-13/16 in ID x 13 in OD x 19 in H Dimensions