Requirements for the clearance between the door body and the box body of rural lighting Ready Board Box in Africa

The clearance between the door body and the box body of the African rural lighting ready board should be uniform, and the deviation of the same gap should not exceed 1mm. When the length of the door gap is greater than 1000mm, the deviation should not exceed 1.5mm. This indicator is a key assembly parameter to ensure the IP44/IP54 protection level of the box body, and is suitable for the outdoor high temperature, sandstorm, and heavy rainfall rural operating environment in Africa.

Excessive gap deviation can cause inconsistent compression of the sealing strip, resulting in virtual pressure gaps in some areas. Rainwater and dust can easily invade the interior of the box, causing component corrosion, short circuits, and metering module failures, significantly increasing the on-site maintenance failure rate of lighting ready boards. During assembly, it is necessary to control the entire process of sheet metal cutting, box welding, and hinge calibration to eliminate uneven gaps caused by box welding deformation, door panel warping, and hinge offset.

The inspection uses a feeler gauge to measure at multiple points along the door gap, including the top, middle, and bottom. When the door is closed and locked, it should open and close flexibly, without any jamming or paint rubbing, and there should be no obvious shaking of the locked door body. Except for gap deviation, the overall gap of the door body should be controlled at around 0.5mm to ensure uniform compression of the sealing strip and achieve reliable dust and water resistance. The gap between doors must be included as a mandatory inspection item in the factory inspection to avoid the delivery of unqualified products to African sites, reduce overseas returns and after-sales costs, and ensure the long-term stable operation of rural lighting distribution systems.