A waterproof distribution box may be delivered correctly, then someone makes a secondary opening on site. Later, water appears, and nobody is sure who changed what. This is one of the hardest after-sales situations because the product history has been broken.
Secondary openings are sometimes necessary. The site changes, cable routes shift, or equipment is added. The problem is not the change itself. The problem is making the change without photos, approval, sealing method, or a note that connects the work to the box.
Penghan PHLTD can make waterproof distribution box content stronger by explaining traceability after delivery. If a box is opened or modified, the customer should record who did it, where the opening is, what accessory was used, and how sealing was handled.
This protects everyone. The site team is not automatically blamed. The supplier is not forced to guess. The buyer has evidence to understand whether the issue came from product, installation, or later modification.
A good article should say this gently but clearly: if the box is changed after delivery, let the change leave a footprint. Without that footprint, truth becomes difficult to find.
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PHLTD (Penghan) specializes in low-voltage distribution products, including industrial socket boxes, waterproof distribution boxes, temporary distribution boxes, maintenance power boxes, and customized distribution boxes. We can provide product communication and configuration suggestions based on project scenarios. Penghan New Energy Co., Ltd./Penghan Electric Co., Ltd./Hefei Penghan Electric Co., Ltd