In response to the high temperature, high humidity, high dust, and poor maintenance conditions in rural Africa, the recommended wire selection for lighting electrical Ready Board Box is as follows (350 words): Firstly, single core copper wire (BV) is preferred, and small branch lines can be equipped with multi-core flexible wire (BVR) - for the main line, busbar, and fixed terminal connections inside the box: single core hard copper wire (BV) is preferred. The single core structure has high mechanical strength, is not easily deformed, and is more tightly crimped with terminal screws. It has low contact resistance, less heat generation, and long-term stability, and can resist frequent start stop and vibration of rural power grids, reducing the risk of virtual connection and oxidation. Single core wire has stronger oxidation resistance, longer lifespan, and more economical price. -Box door connection, short distance bent branch line: A small amount of multi-core flexible wire (BVR) can be used to facilitate wiring, but the crimping terminals must be standardized to prevent loose wires, oxidation, and heating. 2、 Core material: Tin plated copper is preferred, followed by high-purity oxygen free copper - in humid, salt spray, and dusty rural areas of Africa, copper is prone to oxidation and blackening, leading to a significant increase in contact resistance. The tin layer on the surface of tinned copper isolates air and water vapor, preventing oxidation, sulfurization, and corrosion. Its lifespan is 3-5 times longer than that of pure copper; Tin layer improves solderability and terminal connection reliability, reducing maintenance frequency. The conductivity slightly decreases (about 95% IACS), but the low-voltage circuit for lighting can be ignored. -If the cost is limited and the environment is relatively dry, high-purity oxygen free copper (≥ 99.95%) can be used, but the insulation must be intact and the joints must be sealed and moisture-proof. Summary of Rural Lighting electrical ready boards in Africa: Single core tinned copper is used for both the main and fixed circuits, ensuring stability, corrosion resistance, and low cost; A small amount of flexible branch lines are made of multi-core tin plated copper. Tin plating treatment is crucial for adapting to harsh environments and ensuring long-term reliable power supply.