ABB - Installation Products 3993 - 2-1/2 Inch Threaded Insulated Grounding Bushing, Iron, Electro Zinc Plated, Wire Range 6 to 4/0, Thermoplastic Insulator for Use with Rigid/IMC Conduit
ABB - Installation Products

3993

UPC: 786210039930

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Installation InstructionsSpecification SheetManufacturer Product Website

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Overview

The ABB 3993 2-1/2" Threaded Insulated Grounding Bushing provides a reliable grounding solution for Rigid and IMC conduit systems. Constructed from electro zinc-plated iron, it ensures corrosion resistance and long-term durability in industrial environments. The thermoplastic insulator is designed to accommodate wire sizes ranging from 6 AWG to 4/0 AWG, offering flexibility for various grounding applications. This bushing is specifically engineered for use with 2-1/2" threaded conduit, providing a secure and insulated connection point for grounding conductors. The threaded design ensures a tight fit, preventing loosening under vibration or mechanical stress. Ideal for electrical installations requiring compliance with NEC and OSHA standards, this grounding bushing is a critical component in maintaining system integrity and safety. The ABB 3993 is manufactured to meet industry specifications and is suitable for both indoor and outdoor applications where grounding reliability is paramount.
  • 2-1/2" threaded size for Rigid/IMC conduit compatibility
  • Electro zinc-plated iron construction for corrosion resistance
  • Thermoplastic insulator rated for wire sizes 6 to 4/0 AWG
  • Designed for secure grounding connections in industrial environments
  • Meets NEC and OSHA grounding compliance standards

Specifications

Application
For Quick Installation of Bonding Jumper to Multiple Metal Conduits (Rigid and IMC)
Finish
Electro Zinc Plated
Material
Malleable Iron
Material
Iron, Electro Zinc Plated
Size
2-1/2 Inch
Special Features
Grounding Bushings & Accessories
Standard
UL E3060, CSA
Type
Grounding Bushings & Accessories
Package Dimensions (L x W x H)
0.01 IN x 0.01 IN x 0.01 IN
Package Dimensions (L x W x H)
0.0254 cm x 0.0254 cm x 0.0254 cm
Package Weight (Imperial)
0.6500 L
Package Weight (Metric)
0.2950 kg
Threadless Bushing, Insulated, Grounding, Malleable Iron, Size 1/2 Inch

TL-381

Threadless Bushing, Insulated, Grounding, Malleable Iron, Size 1/2 Inch
1 Inch, Bushing, Iron-Zinc Plated, For Use with Rigid/IMC Conduit

BU 403

1 Inch, Bushing, Iron-Zinc Plated, For Use with Rigid/IMC Conduit
1" rigid floor flange plates made of malleable iron with a zinc-plated finish. The sheet identifies this as catalog number 67441. Packaged box/10.

67441

1" rigid floor flange plates made of malleable iron with a zinc-plated finish. The sheet identifies this as catalog number 67441. Packaged box/10.
Anti-Short Bushing, Sizes-8-4, 6-2, 6-3, 4-2, 4-3 and 6-4

394

Anti-Short Bushing, Sizes-8-4, 6-2, 6-3, 4-2, 4-3 and 6-4
3 Inch Threaded Insulated Grounding Bushing, Iron, Electro Zinc Plated, Wire Range 6 to 4/0, Thermoplastic Insulator for Use with Rigid/IMC Conduit

3994

3 Inch Threaded Insulated Grounding Bushing, Iron, Electro Zinc Plated, Wire Range 6 to 4/0, Thermoplastic Insulator for Use with Rigid/IMC Conduit
3-1/2 Inch Threaded Insulated Grounding Bushing, Iron, Electro Zinc Plated, Wire Range 6 to 4/0, Thermoplastic Insulator for Use with Rigid/IMC Conduit

3995

3-1/2 Inch Threaded Insulated Grounding Bushing, Iron, Electro Zinc Plated, Wire Range 6 to 4/0, Thermoplastic Insulator for Use with Rigid/IMC Conduit
4 Inch Threaded Insulated Grounding Bushing, Iron, Electro Zinc Plated, Wire Range 6 to 4/0, Thermoplastic Insulator for Use with Rigid/IMC Conduit

3996

4 Inch Threaded Insulated Grounding Bushing, Iron, Electro Zinc Plated, Wire Range 6 to 4/0, Thermoplastic Insulator for Use with Rigid/IMC Conduit
5 Inch Threaded Insulated Grounding Bushing, Iron, Electro Zinc Plated, Wire Range 6 to 4/0, Thermoplastic Insulator for Use with Rigid/IMC Conduit

3998

5 Inch Threaded Insulated Grounding Bushing, Iron, Electro Zinc Plated, Wire Range 6 to 4/0, Thermoplastic Insulator for Use with Rigid/IMC Conduit

How to Install a Threaded Insulated Grounding Bushing (3993 Series)

This guide provides step-by-step instructions for installing threaded insulated grounding bushings, such as the 3993 series, onto conduit and connecting a bonding jumper.

Estimated time: 15m

Tools needed:

Screwdriver, Torque wrench, Wire strippers

Supplies needed:

Bonding jumper, Conduit

  1. Thread the Bushing onto Conduit

    Thread the insulated grounding bushing onto the conduit until it bottoms. If necessary, you may back off the bushing slightly to align the lay-in lug in the desired position.

  2. Secure the Bushing

    Tighten the set screw to firmly secure the bushing onto the conduit. Ensure the bushing is stable and properly seated.

  3. Connect the Bonding Jumper

    Install a bonding jumper (not supplied) into the lay-in lug. For copper conductors, torque the wire clamping screw to 200 Lb.In. For aluminum stranded conductors, torque to 35 Lb.In. Do not use this lug with aluminum solid conductors.

Frequently Asked Questions about ABB - Installation Products

How are Thomas and Betts products typically installed?

Thomas and Betts products are installed using a variety of methods tailored to specific applications, including the use of flexible cords and cable fittings, non-metallic cable glands, and armored cable fittings. Proper selection of fittings is crucial to match the cable type and installation environment, ensuring durability and preventing physical damage. Tools such as the Blackburn® Comfort Crimp® and HEX-FLEX® systems enhance installation efficiency and reliability, reducing labor time and ensuring secure connections.

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Thomas and Betts offers a comprehensive range of accessories for their products, including various cord and cable fittings, non-metallic cable glands, service entrance cable fittings, and armored cable fittings. Their accessories are designed to enhance installation efficiency and ensure compatibility with different cable types and environmental conditions, providing reliable connections for a wide array of applications.

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Thomas and Betts products are known for their innovative designs, high performance, and compliance with industry standards such as the National Electrical Code and Underwriters' Laboratories. They offer a comprehensive range of rugged and reliable electrical fittings, including liquidtight and dust-tight connections, which enhance installation efficiency and reduce overall project costs. Their products are engineered for durability in harsh environments, ensuring long-term reliability and lower installed costs.

What are the main product lines offered by Thomas and Betts?

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What industries and applications are Thomas and Betts products used for?

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What certifications and standards do Thomas and Betts products comply with?

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What are the main product lines offered by Ocal?

Ocal offers a comprehensive range of corrosion-resistant conduit systems, including PVC-coated conduit and fittings, conduit bodies, hazardous location fittings, and strut accessories. Their products are designed to provide superior corrosion protection, featuring a hot-dipped galvanizing process and UL listed Type 4X PVC-coated conduit bodies, ensuring durability in the most demanding environments.