Based on the usage environment, structural strength requirements, and cost control goals of rural Africa, the thickness of the outer shell of the lighting electrical ready board in rural Africa should follow the principle of "minimum compliance and adaptation to the scene". The comprehensive judgment is that the thickness of the cold-rolled steel plate outer shell should not be less than 0.6mm, and the thickness of the PC material outer shell should not be less than 3mm. This standard can maximize the control of production costs and adapt to the actual needs of rural Africa while ensuring safe use.

African rural lighting electrical ready boards are often installed outdoors or in simple sheds, facing problems such as high temperatures, dust, minor collisions, and mosquito erosion. The thickness of the outer shell directly determines the structural stability and protective performance. If the outer shell of the steel plate is less than 0.6mm, it is prone to deformation and damage due to sand and dust wear, accidental collisions, resulting in exposed internal electrical components and causing safety hazards such as short circuits and leakage; If the PC material shell is less than 3mm, it is difficult to resist aging and cracking after high temperature exposure, and cannot withstand outdoor environments for a long time.

From a cost control perspective, the budget for rural power infrastructure construction in Africa is limited, and excessive increase in shell thickness will significantly increase material and transportation costs. 0.6mm steel plate and 3mm plastic are both the most cost-effective choices, without the need for industrial grade thick walled materials (such as steel plates above 2.0mm), and can meet the lightweight needs of rural lighting electrical ready boards, adapting to local simple installation methods while reducing losses in production and transportation.

It should be noted that if the electrical ready board is installed in an area with severe sandstorms and high collision risks, it can be appropriately raised to 0.8mm steel plate or 3.0mm plastic, while still balancing cost and strength; If installed indoors and with good protective conditions, the minimum standard can be maintained unchanged. Overall, 0.6mm (steel plate) and 3mm (PC material) are the minimum reasonable thicknesses for the outer shell of rural lighting electrical ready boards in Africa, which can achieve a balance between structural strength and cost control.