... BC9310 Metal Halide Explosion Proof Light with emergency Ex mark:Exd II C T6 DIP A20 TA,T6GB Certificate:CNEx09 ... to use in Zone 1, Zone 2 or Zone 20, Zone 21, Zone 22;2,Can be use ... is cut off. They can also be connected with external switch, which is started when the power ... low maintenance.·Osram brand power supply and appliances, with stable performance.·It uses dual-chamber explosion-proof design ...