SEPCO ST10 Series Polypropylene Insulated Plastic Bushing

SEPCO ST10 Series Polypropylene Insulated Plastic Bushing

The SEPCO ST10 Polypropylene Insulated Plastic Bushing is a non-conductive fitting engineered to protect conductor insulation wherever wires pass through conduit ends, enclosure knockouts, or equipment openings. Molded from durable polypropylene, this insulated bushing series is available in trade sizes ranging from 1/2" through 4" (1/2", 3/4", 1", 1-1/4", 1-1/2", 2", 2-1/2", 3", 3-1/2", and 4"), covering the full range of conduit terminations and enclosure knockouts encountered on the job. Because the bushing body is plastic rather than uncoated metal, it adds a non-conductive insulating barrier between conductors and the surrounding raceway or enclosure, supporting safer, code-conscious electrical installations.

Key Features

• Trade Size Range: available from 1/2" through 4", sized to match the full range of conduit terminations and enclosure knockouts on a job.
• Durable Construction: molded from durable, non-conductive polypropylene plastic for long-lasting performance and corrosion resistance across every size in the series.
• Insulated Design: the insulated bushing body creates a protective barrier between conductors and metal conduit or enclosure edges, reducing the risk of insulation damage.
• Plastic Bushing Type: the SEPCO ST10 is a dedicated insulated plastic bushing, purpose-built as a wire-protection fitting rather than a general-purpose part.
• Smooth, Rounded Profile: the bushing's contoured surface helps guide conductors through openings without introducing sharp edges that could nick or abrade wire jackets.
• Lightweight, Non-Metallic Material: polypropylene construction is lighter than comparable metal bushings, simplifying handling and installation on the jobsite.
• Corrosion Resistance: unlike uncoated steel or iron fittings, the plastic body will not rust, making it well suited to installations where moisture exposure is a concern.

Technical Specifications

• Trade Size Range: 1/2" - 4" (10 sizes: 1/2", 3/4", 1", 1-1/4", 1-1/2", 2", 2-1/2", 3", 3-1/2", 4").
• Material: Polypropylene.
• Refer to manufacturer documentation for complete technical specifications.

Typical Applications

• Conduit and Raceway Terminations
• Panelboard and Enclosure Knockout Protection
• Commercial and Industrial Electrical Installations
• Wire and Cable Pulling Applications
• Renovation and New Construction Electrical Work

Why SEPCO?

SEPCO builds the ST10 insulated plastic bushing series from durable polypropylene to give electrical professionals a dependable, non-conductive option for protecting conductor insulation at conduit and enclosure openings, across trade sizes from 1/2" through 4". The corrosion-resistant plastic construction is a practical alternative to metal bushings in installations where insulation and weight matter, helping installers complete clean, code-conscious electrical work with confidence in the SEPCO name.