An enclosure comprising: a housing including first and second housing parts that cooperate to enclose an interior of the housing , the first and second housing parts being moveable relative to one another between an open position and a closed position; a perimeter seal defined between the first and second housing parts when the first and second housing parts are in the closed position; the first housing part including a main wall and a perimeter wall that projects from the main wall , wherein the perimeter wall includes first and second sidewall portions respectively at the first and second sides of the housing , wherein the first and second sidewall portions are separated by a width of the housing , wherein plate retention tabs are unitarily formed with the first and second sidewall portions , wherein the enclosure includes a component mounting plate sized to extend across the width of the housing , wherein the component mounting plate is retained at the main wall at a component plate mounting location within the interior of the housing by a snap-fit connection provided by the plate retention tabs , wherein the plate retention tabs include ramp surfaces that angle from the first and second sidewall portions into the interior of the housing as the ramp surfaces extend in a direction toward the main wall , wherein the ramp surfaces terminate at shoulder portions that oppose the main wall , characterized in that the main wall defines a plate recess for receiving the component mounting plate , wherein the component mounting plate is flush with a primary surface of the main wall when mounted in the plate recess , wherein the plate recess has a depth equal to a thickness of the component mounting plate , wherein when the component mounting plate is snapped into the plate recess , the shoulder portions retain the mounting plate within the plate recess . a housing including first and second housing parts that cooperate to enclose an interior of the housing , the first and second housing parts being moveable relative to one another between an open position and a closed position; a perimeter seal defined between the first and second housing parts when the first and second housing parts are in the closed position; the first housing part including a main wall and a perimeter wall that projects from the main wall , wherein the perimeter wall includes first and second sidewall portions respectively at the first and second sides of the housing , wherein the first and second sidewall portions are separated by a width of the housing , wherein plate retention tabs are unitarily formed with the first and second sidewall portions , wherein the enclosure includes a component mounting plate sized to extend across the width of the housing , wherein the component mounting plate is retained at the main wall at a component plate mounting location within the interior of the housing by a snap-fit connection provided by the plate retention tabs , wherein the plate retention tabs include ramp surfaces that angle from the first and second sidewall portions into the interior of the housing as the ramp surfaces extend in a direction toward the main wall , wherein the ramp surfaces terminate at shoulder portions that oppose the main wall , characterized in that the main wall defines a plate recess for receiving the component mounting plate , wherein the component mounting plate is flush with a primary surface of the main wall when mounted in the plate recess , wherein the plate recess has a depth equal to a thickness of the component mounting plate , wherein when the component mounting plate is snapped into the plate recess , the shoulder portions retain the mounting plate within the plate recess . <EOS>