Authorized ABB Distributor (Installation Products)
ABB - Installation Products 291-TB - Duplex Clamp Connector, Knockout Size 1/2 Inch, 1-13/32 Inch Long, 1-11/16 Inch Wide, Malleable Iron

ABB Installation Products 291-TB Duplex Clamp Connector, Knockout Size 1/2 Inch, 1-13/32 Inch Long, 1-11/16 Inch Wide…

UPC: 786210002910


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Overview

The ABB Duplex Clamp Connector (SKU 291-TB) is a malleable iron fitting engineered for secure, long-lasting connections in industrial electrical installations. Designed to accommodate a 1/2-inch knockout size, this connector provides a robust solution for joining non-metallic and armored cables with flexible metal conduit. The connector measures 1-13/32 inches in length and 1-11/16 inches in width, offering a compact yet durable form factor ideal for tight spaces and high-stress environments. Constructed from malleable iron, the 291-TB delivers exceptional strength and ductility, resisting mechanical stress, vibration, and moderate impact without fracturing. Its duplex clamp design ensures a stable, vibration-resistant connection, critical for maintaining electrical system integrity in demanding applications. The connector features a smooth plastic bushing that protects conductor insulation from abrasion caused by rough edges of armored cable or flexible metal conduit, reducing the risk of insulation damage during installation and operation. The 291-TB is UL Listed under File No. 2884, meeting rigorous safety and performance standards for electrical fittings. It is part of ABB Installation Products' comprehensive line of conduit and cable fittings, designed for compatibility with standard electrical enclosures and systems. Its precision-engineered dimensions ensure seamless integration with 1/2-inch knockout openings, making it a reliable choice for electricians and maintenance professionals working in industrial, commercial, and utility settings. Key applications include industrial machinery, commercial buildings, utility systems, and any environment requiring secure cable connections with armored or flexible metal conduit. The malleable iron construction ensures durability in harsh conditions, while the duplex clamp design provides a firm grip on cables, preventing slippage or loosening over time.
  • Malleable iron construction for durability and strength in harsh environments
  • 1/2-inch knockout size compatibility for standard electrical enclosures
  • Duplex clamp design ensures stable, vibration-resistant cable connections
  • Smooth plastic bushing protects conductor insulation from abrasion
  • ABB Installation Products Quality

Specifications

Connection Type
Duplex Clamp
Material
Malleable Iron
Mounting Type
Knockout Mounting
Series
ABB Duplex Clamp Connector
Size
1/2 Inch Knockout, 1-13/32 Inch Long, 1-11/16 Inch Wide
Package Dimensions (L x W x H)
4 IN x 4.5 IN x 6 IN
Package Dimensions (L x W x H)
10.16 cm x 11.43 cm x 15.24 cm
Package Weight (Imperial)
0.1800 L
Package Weight (Metric)
0.0820 kg
Connector, Screw-In, Zinc Die Cast, Flex Size 2 Inch

525-DC2

Connector, Screw-In, Zinc Die Cast, Flex Size 2 Inch
Straight Squeeze Type Connector, Conduit Size 3 Inches, Length 2-7/8 Inches, Width 3-13/16 Inches, Material Zinc Plated Malleable Iron, For use with Armored Cable/Flexible Metal Conduit

XC 408

Straight Squeeze Type Connector, Conduit Size 3 Inches, Length 2-7/8 Inches, Width 3-13/16 Inches, Material Zinc Plated Malleable Iron, For use with Armored Cable/Flexible Metal Conduit
Squeeze Connector, 90 Degree Bend, Trade Size 1 Inch, Knockout Size 1 Inch, Cable Range 1.187 to 1.406 Inch, Malleable Iron

273-TB

Squeeze Connector, 90 Degree Bend, Trade Size 1 Inch, Knockout Size 1 Inch, Cable Range 1.187 to 1.406 Inch, Malleable Iron
Squeeze Connector, 90 Degree Bend, Trade Size 3/8 Inch, Knockout Size 1/2 Inch, Cable Range 0.688 to 0.812 Inch, Steel

272

Squeeze Connector, 90 Degree Bend, Trade Size 3/8 Inch, Knockout Size 1/2 Inch, Cable Range 0.688 to 0.812 Inch, Steel
Metal-Clad and Armored Cable Fitting, 90 Degree Bend, Trade Size 3 Inch, Knockout Size 3 Inch, Cable Range 3.312 to 3.562 Inch, Malleable Iron with Zinc Plating, Nylon Insulated

3142

Metal-Clad and Armored Cable Fitting, 90 Degree Bend, Trade Size 3 Inch, Knockout Size 3 Inch, Cable Range 3.312 to 3.562 Inch, Malleable Iron with Zinc Plating, Nylon Insulated
Metal-Clad and Armored Cable Fitting, 90 Degree Bend, Trade Size 3-1/2 Inch, Knockout Size 3 Inch, Cable Range 3.620 to 4.060 Inch, Malleable Iron with Zinc Plating, Nylon Insulated

3143

Metal-Clad and Armored Cable Fitting, 90 Degree Bend, Trade Size 3-1/2 Inch, Knockout Size 3 Inch, Cable Range 3.620 to 4.060 Inch, Malleable Iron with Zinc Plating, Nylon Insulated
Metal-Clad and Armored Cable Fitting, 90 Degree Bend, Trade Size 4 Inch, Knockout Size 4 Inch, Cable Range 4.120 to 4.560 Inch, Malleable Iron with Zinc Plating

3144-TB

Metal-Clad and Armored Cable Fitting, 90 Degree Bend, Trade Size 4 Inch, Knockout Size 4 Inch, Cable Range 4.120 to 4.560 Inch, Malleable Iron with Zinc Plating
Metal-Clad and Armored Cable Fitting, Straight, Trade Size 3 Inch, Knockout Size 3 Inch, Cable Range 3.312 to 3.562 Inch, Malleable Iron with Zinc Plating

316

Metal-Clad and Armored Cable Fitting, Straight, Trade Size 3 Inch, Knockout Size 3 Inch, Cable Range 3.312 to 3.562 Inch, Malleable Iron with Zinc Plating

Frequently Asked Questions

What are the dimensions of the 291-TB connector?

The connector measures 1-13/32 inches in length and 1-11/16 inches in width, with a 1/2-inch knockout size.

What is the material of the 291-TB connector?

The 291-TB is constructed from malleable iron, providing strength and ductility for demanding applications.

What cable types is the 291-TB compatible with?

The 291-TB is designed for non-metallic and armored cables, as well as flexible metal conduit.

Does the 291-TB include a bushing?

Yes, the connector features a smooth plastic bushing to protect conductor insulation from abrasion.

What applications is the 291-TB suitable for?

The 291-TB is suitable for industrial machinery, commercial buildings, utility systems, and environments requiring secure cable connections.

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.

What accessories are available for Thomas and Betts products?

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.

What environmental ratings do Thomas and Betts products have?

Thomas and Betts products feature robust environmental ratings, including NEMA Type 1, 2, 3, 4, 4X, 12, and 13 certifications, as well as IEC 60529 IP66 protection. These ratings ensure that their products are designed to withstand harsh industrial environments, with capabilities to resist dust, water, and corrosion, and operate effectively in a wide temperature range.

What communication protocols do Thomas and Betts products support?

Thomas and Betts products support a wide range of industrial communication protocols, including Ethernet, DeviceNet, PROFIBUS, Modbus, CANopen, and others. This extensive compatibility ensures seamless integration and reliable communication across various industrial automation systems, catering to diverse application needs.

What are the key features of Thomas and Betts products?

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?

Thomas and Betts offers a comprehensive range of product lines including electrical connectors, cable management systems, grounding and bonding solutions, and industrial automation components. Their products are designed for durability and reliability in demanding industrial environments, ensuring optimal performance and safety across various applications.

What technical support does Thomas and Betts offer?

Thomas and Betts offers comprehensive technical support, including access to field application engineers for onsite training and installation assistance. Their technical support staff is available to address inquiries related to product specifications and installation practices, ensuring optimal performance and safety of electrical systems. Additionally, they provide a variety of training programs to enhance the knowledge and skills of users in the field.

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

Thomas and Betts products are utilized across various industries including electrical construction, industrial automation, telecommunications, and utilities. Their extensive range of cord and cable fittings, electrical boxes, and metal framing systems are designed for applications that require durability and reliability in harsh environments, ensuring optimal performance in both permanent and temporary installations.

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

Thomas and Betts products comply with critical international certifications including UL (Underwriters Laboratories), CSA (Canadian Standards Association), and CE (European Community). Our products are designed to meet rigorous industrial standards such as NEMA enclosure ratings and IEC 60529 IP ratings, ensuring safety and reliability across various industrial applications.

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.