With introducing the foreign SMC,DMC advanced technology, ammeter box has outstanding performances,such as proof-corrosion,absolutely sealed proof-water,because of its good insulation the applied materials,no grounding coil is needed.also it has the safe protection of the lock and lead-seal.service life is more than 60years in the room,above 30 years ortside the room.There is no hurt on it when we pressed 3 times on every weak places of the outside-shell of the pressing checker with the strength 1N.m.

It can be directly fixed in the wall,be installed on the power pole,be fitted with the mechanical meters DD862,DD282,etc.Inside or outside of it,every family can respectively install the controlled leakage switch DZ47 or RCL fuse.