1)fireproof, corrosion-proof 2)insulative and compression-resistant 3) High mechanical strength 4)Good electrical capability Installed on the wall, or on the electric pole, suitable for mechanical meters, electronic meters or plug-in card meters, withRCCB, DZ47, RC1 fuses, disconnecting switches and terminal boxes(terminals), etc. And can be equipped with the padlock rain screen and magnifier. The user can orperate the switch outside the box. The transparent panel on the case shows switches. There are various outline sizes for this series.