The punching edge of the cold-rolled steel plate lighting electrical Ready Board Box should be free of burrs and flying edges. The industry's general process acceptance requirements: the height of burrs should not exceed 0.1mm; the commonly used loose acceptance threshold for foreign trade and rural projects in Africa is not more than 0.2mm, and the 0.1mm limit should be prioritized for live contact areas such as hole positions and cable through holes.

The lighting electrical ready board body is made of cold-rolled steel plate stamping, and punching burrs is a key production control point. Sharp burrs can easily scratch the insulation layer of cables, causing leakage and short circuit faults. They can also scratch construction workers during assembly and affect the adhesion of sealing strips, resulting in sealing failure of the box, sand and dust intrusion, and increased internal condensation, reducing the protection level and long-term operational reliability of the electrical ready board. After punching, a deburring process must be arranged, and the surface must be smooth and even after polishing, without flanging, tearing, or sharp corners. The inlet and outlet holes also need to be equipped with insulation rings for further protection.

According to the requirements of IEC standards, the burr limit is linked to the plate thickness and accuracy level. 1.0-1.5mm cold-rolled plates are commonly used for lighting electrical ready boards, and conventional grade stamped parts are controlled within 0.1mm. This is also the mainstream internal control standard for complete electrical enclosures in China. During inspection, hand feel initial inspection, plug gauge or contour meter sampling can be used. If burrs exceeding the standard are found, they will be reworked uniformly. It is strictly prohibited to directly flow into the spraying and assembly processes. This indicator is linked to the quality of box bending, welding, and spraying, and is a basic process requirement for ensuring the mechanical safety, insulation performance, and protection capability of the electrical ready board. It is also a necessary inspection item for project inspection and on-site acceptance.