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The ABB INSTALLATION PRODUCTS A420RR is a 4-inch square, two-gang PVC box cover designed for use with standard 4-inch square electrical boxes. The cover features a 1/2-inch raised profile and provides 6.1 cubic inches of usable interior volume. Built from PVC, it offers corrosion resistance suitable for a range of electrical rough-in applications. Electricians use this cover to transition from a 4-inch square box to a two-gang device configuration, maintaining a clean, code-compliant finish at device locations. It ships in packages of six units, making it practical for multi-unit or production wiring jobs.
This box cover is suited for residential and light commercial electrical installations where 4-inch square boxes are used as the primary rough-in enclosure. It is also noted as compatible with ENT quick connect blue conduit boxes, making it a practical choice when ENT wiring methods are used. The 1/2-inch rise accommodates standard device mounting depth in single-gang and two-gang finish configurations, and it works well in both new construction and retrofit scenarios.
Compatible with standard 4-inch square electrical boxes and ENT quick connect blue conduit boxes. Suitable as a two-gang device cover for common square-box rough-in applications.
Installation is performed by licensed electricians in accordance with the National Electrical Code (NEC). De-energize the circuit and verify with a voltage tester before handling any box or cover. Secure the cover to the box using the appropriate screws and confirm device mounting ears are properly seated before attaching the finish plate. Do not overtighten fasteners on PVC covers, as the material can crack under excessive torque.
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