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4" Square Plenum Boxes with Air-Tight Conduit K.O.S
4" Square Plenum Boxes with Air-Tight Conduit K.O.S Material：Galvanized SteelApplication: These 4”square boxes with conduit knockouts are installed in walls or ceilings forlighting fixtures, switches, receptables or other outlet devices. Square boxes are used to bring power to a number of electrical devices where multiple conductor runs are split in two or more directions. Advantages: Can be surface or flush mounted when multidirectional conduit runs are necessary. Red painted boxes are also available to easily distinguish fire alarm circuits. Field Names: 4S Box, 1900 box, 1900 electric -
4-11/16" Square Plenum Boxes with Air-Tight Conduit K.O.S
4-11/16" Square Plenum Boxes with Air-Tight Conduit K.O.S Material：Galvanized SteelApplication: These 4-11/16”square boxes with conduit knockouts are larger boxes installed when larger-sized conductors are required. These boxes are great for industrial applications. Advantages: Can be used where reduced wall depth imposes limitations. They also have versitile, combination-head screws that securely fasten a cover to an electrical junction box using a slotted, Phillips, or Robertson head screwdriver. Field Names: 11B Box, 11B junction box, 5S box, shallow 11B box, shallow 5S box, shallow e
