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NSI Industries SGBS-39050 - Split Bushing, Insulated, Grounding, Steel, Size 4 Inch, 350-500 MCM Lug

NSI Industries SGBS-39050 Split Bushing, Insulated, Grounding, Steel, Size 4 Inch, 350-500 MCM Lug

UPC: 781747239068


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Contact for Pricing

Call +1 (262) 252-1600 (toll-free 877-268-3700) or email [email protected] for pricing and availability.

Overview

The NSI Industries SGBS-39050 is a 4-inch insulated grounding split bushing designed for post-wire pull installation on Rigid or IMC conduit. Its split design enables installation after wire pulling, eliminating the need to remove or reposition conduit sections. The insulated construction prevents direct contact between the grounding lug and metal conduit, reducing the risk of shorts and enhancing safety. The bushing features a zinc-plated steel body with a tin finish, an integral aluminum alloy 6061-T6 grounding lug rated 150°C, and a smooth interior to minimize wire abrasion during pulling operations. With dimensions of 2.99" (A), 4.60" (B), 0.73" (C), 5.00" O.D. (D), and 3.87" I.D. (E), this product meets NEMA FB-1 and Federal Specification A-A-50553 requirements. Ideal for utilities and large electrical service conduits where full-size grounding wires are mandated, the SGBS-39050 ensures reliable bonding and grounding in industrial, commercial, and power distribution systems.
  • 4" trade size split bushing for Rigid/IMC conduit
  • Accommodates 350-500 MCM copper or aluminum grounding conductors
  • Post-wire pull installation without conduit disassembly
  • Zinc-plated steel body with tin finish and aluminum alloy 6061-T6 grounding lug
  • Rated 150°C with smooth interior to reduce wire abrasion

Specifications

Application
Used in situations where wires have already been pulled through Rigid/IMC conduit, and an insulated bushing is required. 350 MCM - 500 MCM Aluminum Grounding Lug. Rated 150 Degree C. Patented
Color
Grey with Black Insulator
Finish
Zinc Plated
Material
Steel, 6061-T6 AL Lug
Size
4 IN
Special Features
Good for Utilities and Large Electrical Service Conduits, especially where a full size grounding wire is required.
Standard
cULus
Temperature Rating
150 Deg C
Temperature Rating, Maximum
302 F
Temperature Rating, Maximum
150 C
Temperature Rating, Minimum
302 F
Temperature Rating, Minimum
150 C
Trade Size
4 in
Type
Bushing
Package Weight (Imperial)
1.846 L
Package Weight (Metric)
0.837 kg
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Frequently Asked Questions

What is the maximum operating temperature?

The product is rated for a maximum operating temperature of 150 degrees Celsius.

What is the material of the product?

The product is made of steel with a zinc plated finish.

What is the trade size of the bushing?

The trade size of the bushing is 4 inches.

Is this product suitable for large electrical service conduits?

Yes, it is suitable for utilities and large electrical service conduits.

What is the size of the grounding lug?

The grounding lug is designed for 350 MCM - 500 MCM aluminum wire.

What certifications does the product have?

The product meets Federal Specification A-A-50553 and UL Standard 514B.

What is the purpose of the insulated bushing?

The insulated bushing is used where wires have already been pulled through Rigid/IMC conduit.

How many units are in a standard package?

A standard package contains 10 units of the product.

What is the catalog ID for this product?

The catalog ID for this product is SGBS-39050.

What is the UPC number for the product?

The UPC number for the product is 78174723906.

How to Install the Mighty-BOND™ Split Grounding/Bonding Bushing

This guide provides step-by-step instructions for installing the Mighty-BOND™ Split Grounding/Bonding Bushing onto threaded conduit or fittings.

Estimated time: 30m

Tools needed:

Screwdriver, Torque wrench

Supplies needed:

Mighty-BOND™ Split Grounding/Bonding Bushing, Grounding conductor, Bonding conductor

  1. Open and position the bushing

    Open the Mighty-BOND™ split bushing and place it around the conductors on the threaded end of the Rigid or Intermediate Metal Conduit (RMC or IMC).

  2. Close and align the bushing

    Close the bushing and ensure it is aligned to access the set screw, grounding lug, and hinge screw. Back out the set screw sufficiently to allow the two halves to close fully on the conduit or fitting.

  3. Tighten the screws

    Tighten the hinge screw first, followed by the set screw. If applicable, tighten the enclosure bonding screw. Ensure all screws are tightened to the UL Torque requirements of 35 in-lbs.

  4. Insert grounding conductor

    Insert the appropriate sized grounding or bonding conductor into the lug and tighten the screw to the UL recommended torque based on the wire size.

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