The hazards of using PC materials for African rural lighting electrical Ready Board Box with weather resistance not meeting F2 level in Africa

The ultraviolet intensity in the African plateau is 2-3 times that of the domestic plain, and it is exposed to high temperatures all year round. PC raw materials with only F1 or no UV resistance modification will experience aging and failure in the short term. After 6-12 months of production and use, the surface of the box first turns yellow, white and powdery. The molecular chains of the material rapidly deteriorate in toughness under continuous UV cracking, and the originally impact resistant PC becomes brittle and hard.

The outdoor temperature difference between day and night is large, and the box shrinks and expands alternately in hot and cold conditions. The brittle shell is prone to small cracks, and rainwater seeps into the interior of the box through the cracks, corroding copper bars and circuit breaker terminals, causing leakage, short circuit tripping, and large-scale power outages. After 2-3 years of use, the corners and installation holes of the box have cracked extensively, the sealing of the box has failed, and sand, dust, and mosquitoes have entered the electrical ready board, causing switch jamming and loose wiring.

The insulation performance synchronously declines, and the dielectric strength of PC decreases after aging. There is a risk of electric shock and fire in thunderstorm and humid environments, which does not comply with the safety regulations for outdoor power distribution in Africa. In addition, the box body is deformed, the buckle is broken, the box door cannot be closed, losing its protective function, and the cost of equipment maintenance and replacement has significantly increased.

Ordinary F1 grade PCs are only suitable for indoor installation in sunshades and cannot adapt to outdoor direct installation conditions in Africa. The failure rate increases sharply after long-term use, and the after-sales cost of the project doubles.