Southwire 782 Closure Plug 1 Inch

Product Description

The SOUTHWIRE 782 is a 1-inch closure plug designed to seal open knockouts and conduit openings in electrical enclosures, panels, junction boxes, and related fittings. Closure plugs of this type keep debris, pests, and moisture out of energized enclosures while maintaining a clean, code-compliant installation. Licensed electricians and electrical contractors install these plugs during rough-in and finish work wherever an unused knockout needs to be covered. The 782 snaps or threads into a standard 1-inch opening, making it a quick, no-tool solution for sealing unused ports.

The SOUTHWIRE 782 is suited for residential and commercial electrical installations where 1-inch knockouts remain unused after conduit routing is complete. Common install locations include load centers, sub-panels, junction boxes, outlet boxes, and enclosures of similar trade size. The plug helps satisfy NEC requirements for closing unused openings in electrical enclosures to prevent accidental contact with live conductors and to maintain the integrity of the enclosure.

Key Features

• Fits standard 1-inch knockout openings in electrical enclosures and boxes
• Seals unused conduit ports against debris, moisture, and pests
• Supports NEC compliance for closing open knockouts in panels and junction boxes
• Compact, low-profile design that does not protrude significantly inside the enclosure

Compatibility

Designed as an OEM-style replacement and direct-fit closure plug for standard 1-inch trade-size knockout openings commonly found in residential and commercial electrical enclosures, panels, and junction boxes.

Installation Notes

Installation must be performed by a qualified electrician in accordance with applicable NEC requirements and local codes. De-energize and lock out the panel or enclosure before accessing any knockout openings. The plug is pressed or snapped into the knockout by hand; inspect the fit to confirm the opening is fully covered with no gaps. Do not modify the knockout opening or force an oversized plug into place.

Technical Specifications

• Knockout Size: 1 inch

Standard Information

• Brand: SOUTHWIRE
• Manufacturer Part Number: 782