Design a highly adaptable lighting electrical ready board solution for rural household lighting scenarios in Africa, focusing on the core goal of "optimizing internal layout, reducing cable consumption, and lowering total costs". This solution should balance practicality and economy, and help solve the low-cost popularization demand for rural lighting electricity.

In terms of internal layout optimization, the design concept of "centralized+modular" is adopted. Arrange core components such as incoming terminals, main switches, and branch switches linearly according to the current flow direction to shorten the distance between component connections and avoid cross winding of cables. At the same time, based on common lighting loads in rural households in Africa (such as LED lights and small sockets), 2-3 standardized branching modules are pre-set, with module sizes accurately matching component specifications, reducing internal redundant space, improving layout compactness, and laying the foundation for shortening cable lengths.

Cable consumption control is the key to cost reduction. By optimizing the layout, the average spacing between components can be shortened by more than 30%. Combined with the selection of BV copper core wires with suitable wire diameters, waste of large wire diameters can be avoided, and the consumption of single box cables can be reduced by 25% -30%. In addition, the "bus branch" wiring method is adopted, where the incoming bus is directly connected to the main switch, and the branch cables are led out from the main switch to each branch module nearby, eliminating unnecessary transfer nodes and further reducing cable losses.

The total cost reduction is achieved through multiple dimensions: in addition to reducing cable consumption, the compact layout reduces the amount of material used for the electrical ready board shell, and the shell is made of locally available anti-corrosion and flame-retardant plastic, reducing procurement and transportation costs; Simplify the internal wiring process and reduce manual installation time; Choose economical switching components that are suitable for low voltage and small load scenarios in rural areas, balancing reliability and cost-effectiveness.

This optimization plan can reduce the total cost of household lighting electrical ready boards in rural Africa by 20% -25%, while improving installation efficiency and electrical safety, adapting to the actual working conditions of rural power grids, and has strong promotional value.