1. An additional cover for providing a cabinet with protection from fluidic ingress, the additional cover comprising:first and second portions having first and second main sections, respectively, and first and second flanges, respectively; and
first and second sidewalls extending between corresponding sidelong edges of at least the first and second main sections,
the first and second portions and the first and second sidewalls being arranged to define a flow passage with an inlet at an upper end thereof and an outlet at a lower end thereof,
the first and second flanges being provided at the inlet and outlet, respectively, to prevent fluid flow through the flow passage,
respective upper edges of the first and second portions and the first and second sidewalls form the inlet and the first flange extends from the upper edge of the first portion and forms an acute angle with the first portion at the inlet, and
a lower edge of the second portion terminates above a lower edge of the first portion, the second flange extends from the lower edge of the second portion and forms an obtuse angle with the second portion above the outlet, and respective lower edges of the first portion, the second flange and the first and second sidewalls form the outlet.