Tank 1, for containing fluids exiting accidentally from a cabinet 100, of the type comprising a box body 2, defining a containment volume (V), provided with a base 3 from which a pair of lateral walls 4 extend that are parallel to one another, a front wall 5, joining on one side the pair of lateral walls 4 and a rear wall 6, joining on the opposite side the pair of lateral walls 4. Said front wall 5 ends with a fold 7 angled with respect to the front wall 5 and extending along an oblique direction from the front wall 5 to the base 3 so as to define a conveying slide for conveying fluids exiting from the cabinet 100 to inside the tank 1.