MT-100R series round meter base 1. 100Amps,120~240VAC, 2. Single phase,4 ... /2",3/4",1"1-1/4 MT-100R Series Round meter box description: Item Code No.No. of terminalscircuit of ... or 3 wire Copper Jaw,Copper or aluminum connector•The Die-cast Aluminium enclosure.Electrostatically applied epoxy and polyester resins,which ... /2,3/4,1,1-1/4 for option• 100A Round Meter Base