The distribution box should be installed in an area close to the power supply to reduce power loss and ensure safety. Avoid installing in a humid and corrosive environment to prevent equipment damage. Therefore, it is particularly important to choose a waterproof cable box with a high protection level. Select a well-ventilated and dry place to avoid poor heat dissipation causing equipment. Abstract: Outdoor distribution equipment in the hot and humid climate zone is exposed to insulation failure and corrosive damage caused by condensation for a long time. Waterproof and moistureproof: If. Field studies show several reasons why moisture still finds its way inside a weatherproof box: Condensation forms inside sealed weatherproof enclosures when temperatures drop, causing water to collect on sensitive components. High humidity allows insulation materials inside a weatherproof box to. Electrical equipment designed and manufactured according to national standards typically has an upper limit of 40℃ for its operating environment temperature.