1. Outdoor box is equipped with guardrail, grounding and rainproof cover.

2. Color the foundation and pay attention to the beauty.

3. The grounding or neutral branch line shall be connected with the corresponding main line separately, and it is not allowed to connect in series.

4. Check whether leakage detector is installed in the design and proper reserved position of distribution box.

5. The design wires inside the box must meet the requirements, wire diameter and color.

6. Defects caused by ring beams, columns, doorways, shear walls, etc.

7. Zero and ground wires shall be arranged in order.

8. Box and shell are connected in parallel.