Attach a ground wire from one of the threaded studs (A) at the bottom of the housing, to the mounting plate (B). The ground resistance between all system parts shall be <. In this video, we'll walk you through the process of wiring a home distribution box with a detailed connection diagram. This position is the connection point of the grounding wire in the. Strip wires → connect to terminals (phase, neutral, ground) → arrange neatly. Ensure tight contact, correct wiring, and enough space for heat dissipation. Resistance and connections must meet standards; breakers and. Power from factory ground must be installed by a qualified electrician. Each DISTRIBUTION BOX and controller must be grounded. In your case, the main panel is the big (but not so big, more below) panel inside.