Minimum effective period requirements for moisture-proof treatment of lighting Ready Board Box in rural Africa

Adapting to the harsh working conditions of high temperature and humidity, long rainy season, large temperature difference between day and night, inland sandstorms, and coastal salt spray in rural Africa, according to IEC and the general bidding standards for power projects in multiple African countries, the effective period of the integrated moisture-proof and anti-corrosion treatment of the box body shall not be less than 10 years, and the effective period of severe corrosion areas such as coastal salt alkali and coastal villages shall be increased to more than 15 years.

African rural areas lack complete and normalized operation and maintenance, with over 90% of them experiencing high humidity throughout the year and a temperature difference of over 30 ℃ between day and night, which easily leads to condensation inside the box. The moisture-proof protection of rural lighting ready boards in Africa is divided into two layers: structural sealing moisture-proof and substrate anti-corrosion moisture-proof. The durability of both layers should meet the standards simultaneously. The structural layer adopts waterproof sealing, EPDM weather resistant sealing strips, and a complete sealing and moisture-proof system with a design life of not less than 10 years; Ensure no large-scale peeling or water permeability failure within 10 years.

If the effective period of moisture-proof treatment for rural lighting ready boards in Africa is less than 10 years, the sealing strip will quickly age and crack, and water vapor will continue to invade the box, causing terminal corrosion, decreased insulation of the line, frequent leakage tripping, and significantly increasing the cost of inspection and replacement in remote rural areas. The minimum requirement for moisture resistance and durability in ordinary inland rural areas is 10 years; Coastal areas in West Africa and East Africa, as well as rural areas in saline alkali flats, shall comply with the C4 high corrosion environmental standard, and the effective period of moisture-proof and anti-corrosion measures shall not be less than 15 years; In areas with extreme tropical rainforests and heavy rainfall, 304 stainless steel enclosures can be used, with a moisture resistance and durability of up to 20 years, meeting the long-term and frequent maintenance needs.