Drilling holes in the distribution box for waterproofing

Drill rear mounting holes according to the manufacturer template, ensuring precise leveling alignment. A robust waterproof distribution box shields sensitive components from moisture, dust, and mechanical impacts. This guide primarily analyzes structural engineering characteristics, technical specifications, and actual installation procedures to achieve optimal field performance. A waterproof distribution box consolidates multiple DC circuits—from solar strings, battery. It seems like I've previously seen in the installation instructions information about installing drain holes in the bottom of the box for moisture/water to escape. Another electrician and I were talking about caulking the box and I mentioned installing drain holes. Regularly inspect and maintain your installation to ensure long-lasting safety. What tools do I use to drill clean holes in both the plastic and aluminum enclosures so that the cable glands fit snugly without any gaps? I tried searching for M20 drill bits and thread taping, but couldnt really find anything solid. Edit: Link to datasheet of cable gland:. Install outdoor inline cable gland connector on waterproof junction box customized hole. Billions of people don't know this secret! Are you tired of drilling sloppy holes in electrical boxes? Learn the secret to drilling perfect holes every time!