Terminal enclosure

An enclosure comprising:

• a wall having a length, a width and a depth, the wall also defining a longitudinal axis that extends along the length and bisects the width, the length extending between first and second ends of the wall, and the width extending between first and second edges of the wall;
• the wall having a main wall portion having an inner side, an outer side and a nominal wall thickness that extends along the depth of the wall between the inner and outer sides;
• the wall also including a plurality of ribs integrally formed with the outer side of the main wall portion, the ribs being parallel to one another and extending along the length of the wall, the ribs having rib heights that extend along the depth of the wall;
• the wall including a first section that extends along the length of the wall, second sections that extend along the length of the wall, and third sections that extend along the length of the wall;
• the first section being centered between the first and second edges and positioned to include the longitudinal axis, the third sections located adjacent the first and second edges of the wall and the second sections located between the first and the third sections, where ribs of the plurality of ribs are located at the first, second and third sections, and wherein the ribs are arranged in a configuration that is symmetric about the longitudinal axis;
• the thickness of the main wall section having a first average thickness at the first section, a second average thickness at the second sections, and a third average thickness at the third sections, the first average thickness being larger than the second average thickness and the second average thickness being larger than the third average thickness;
• the rib heights having a first average height value at the first section, a second average height value at the second sections and a third average height value at the third sections, the first average height value being smaller than the second average height value, and the second average height value being smaller than the third average height value;
• and
• wherein the ribs are separated from one another across the width of the wall by center-to-center spacings, and wherein the center to center spacings have a first average spacing value at the first section, a second average spacing value at the second sections and a third average spacing value at the third sections, the first average spacing value being smaller than the second average spacing value, and the second average spacing value being smaller than the third average spacing value.