TFF2 distribution box(metal box, enclosure) as a below combination type branch distribution board has new construction and reliable capacity. The rated current of the main switch is 125A. ATF distribution board is applied to indoor electrical system to protect distribution switches with the capacity of delay and protecting the circuit from overload. The box is composed of Nul line and live line terminal and can be divided into flush mounting and surface mounting. Material: Electrolytic cold-rolled steel sheet.