... ,1000A,1600A,3150A 4.Pole:3P,4P MGL Isolation-load switch cab be devided into 18 specs from 125A-4000A,it ... type of module design,it has 3poles and 4poles(3poles+switch neutral pole),applied to make and break circuit or electric ... .32.24.74P0.410.411.52.66External and Installation Dimension Disconnect switch