... in coal mine well for wiring branch connection 2.Numbers of branch :2/3/4 ApplicationBHD20-200mining explosion-proof low voltage ... Out Diamaterof Inlet WireDemension(mm)BHD20-400 1140,660 400 2/3/4 Ø78660*250*220 660*460*220 660 ... *660*220BHD20-200 1140,660,380 200 2/3/4main cableØ64, branch cableØ39470*240*170 ... 470*360*170 470*360*170BHD20-100 660,380 100 2/3/4 Ø39380*290*150 BHD20-40 660,380 ...