... branch connection 2.Contacts 2/3/4 ApplicationBHD20-25/(660,380)-4T mining explosion-proof low voltage cable junction box is ... CablesMax Out Diamaterof Inlet WireDemension(m)BHD20-400 1140,660,380 400 2/3/4 Ø78 660*250*220 660*460 ... *220 660*660*220BHD20-200 1140,660,380 200 2/3/4 main cableØ64, branch cableØ39 ... *100 300*260*100 300*300*100 BHD20-20 660,380 20 2/3/4 Ø17 260*160*80 260*230 ...