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The ABB 691SC is a 3/4-inch plug insert designed for use in electrical conduit and wiring systems. This fitting serves as a sealing or blanking insert for open conduit entries, preventing contaminants, moisture, and debris from entering enclosures or junction boxes. It is a compact, utility-grade component commonly installed by licensed electricians during panel work, conduit rough-in, or enclosure maintenance. The plug insert measures 2.5 inches in length, 2.5 inches in width, and 1.5 inches in height, making it well-suited for tight installation spaces.
The ABB 691SC is used in residential and light commercial electrical installations where open 3/4-inch conduit knockouts or entries need to be closed off. Typical applications include junction boxes, pull boxes, and electrical enclosures where unused conduit openings require a secure, code-compliant plug. Electricians working on panel upgrades, conduit retrofits, or new construction rough-in will encounter this type of fitting regularly.
Designed as an OEM-style replacement or direct-fit plug insert for standard 3/4-inch conduit openings in residential and commercial electrical enclosures.
Installation is performed by a licensed electrician. De-energize and lock out the circuit or panel before servicing any enclosure where this insert will be installed. Ensure the conduit opening is clean and free of burrs before seating the plug insert. Work should comply with applicable NEC requirements for conduit fill and enclosure integrity.
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