The water here doesn't have to come through cables - initially sealed in when the enclosure lid is fitted, then you can get migration of moisture in air through the water seals. As the temperature drops, the water condenses, and repeat.
As Zoom says, a drain hole is required.
Often a problem even on metal IP55/IP65 outdoor enclosures - special "drain plugs" and ventilation "periscopes", "snail vents" and similar are made to help prevent this.
In this particular case, looks very close to the ground, so to prevent condensation completely is rather difficult.
The water here doesn't have to come through cables - initially sealed in when the enclosure lid is fitted, then you can get migration of moisture in air through the water seals. As the temperature drops, the water condenses, and repeat.
As Zoom says, a drain hole is required.
Often a problem even on metal IP55/IP65 outdoor enclosures - special "drain plugs" and ventilation "periscopes", "snail vents" and similar are made to help prevent this.
In this particular case, looks very close to the ground, so to prevent condensation completely is rather difficult.
