... -100R series round meter base 1. 100Amps,120~240VAC, 2. Single phase,4 terminal,2 or 3 wire,Fix hub size:1 ... 100 1 1/4" 40 74X38X42CM•100Amps,120/240V AC,Single phase,4 terminals,2 or 3 wire Copper Jaw,Copper or ... :1/2,3/4,1,1-1/4 for option• 100A Round Meter Base