The power distribution box incoming and outgoing line structure is configured as the following manners that: the box body of the power distribution box is divided into an independent incoming line switch room, an independent watt hour meter room and an independent outgoing. The power distribution box incoming and outgoing line structure is configured as the following manners that: the box body of the power distribution box is divided into an independent incoming line switch room, an independent watt hour meter room and an independent outgoing. Analyze the incoming line part: Determine the incoming line source of the distribution box and the configuration of the incoming line circuit breaker, and understand the power supply method of the distribution box. Identify the dual power switch (if any): Understand the working principle and. The utility model discloses a power distribution box incoming and outgoing line structure. This AutoCAD DWG file includes a complete MDB single line diagram showing circuit breakers, feeders, incomer. This technical article describes single line diagrams of two typical power substations 66/11 kV and 11/0. Also called a distribution board, panel board, breaker panel, or electric panel, it is the central hub in an electrical system that divides incoming power into various subsidiary circuits.