Authorized NSI Industries Distributor
NSI Industries 255-USI - Connector, compression, steel. 105 Degree C insulated throat, size 2"
NSI Industries

255-USI

UPC: 781747222558


Documents & Media
Specification SheetVideo ClipWarranty

Contact for Pricing

Overview

The NSi Industries 255-USI is a UL486A-listed steel compression connector engineered for reliable copper cable connections in industrial environments. This 2" connector features a tin-plated finish for corrosion resistance and a 90°C temperature rating at 600V, meeting UL and cULus standards (file 155027). Designed for flexible and extra-flexible copper cables—including locomotive, welding, and mining applications—the 255-USI includes flared openings for simplified cable insertion and a positive center stop to prevent over-insertion. Its robust steel construction ensures long-term durability under mechanical stress, making it ideal for power distribution, automation systems, and heavy machinery. Compatible with standard compression tools, this connector supports copper cables only and is distributed by Gross Automation. The 255-USI delivers secure, low-resistance connections in demanding industrial settings where reliability and compliance are critical.
  • UL486A and cULus listed (file 155027) for compliance
  • Tin-plated steel construction resists corrosion
  • 90°C temperature rating at 600V
  • Flared openings ease insertion of flexible copper cables
  • Positive center stop prevents over-insertion

Specifications

Application
Compression type connectors used to join EMT to box or enclosure. Concrete Tight. Made in the USA. Insulated Throat -105°C
Connector Type
Compression
Finish
Zinc Electroplated
Insulation
Insulated Throat
Material Quality
Steel
Size
2 IN
Special Features
Concrete tight
Standard
cULus
Temperature Rating, Maximum
221 F
Temperature Rating, Maximum
105 C
Temperature Rating, Minimum
221 F
Temperature Rating, Minimum
105 C
Trade Size
2 in.
Type
Connector
Package Weight (Imperial)
0.629 L
Package Weight (Metric)
0.285 kg
Connector, Set Screw, Steel, Insulated Throat, Size 2-1/2 Inch

236-I

Connector, Set Screw, Steel, Insulated Throat, Size 2-1/2 Inch
Set Screw Connector, Concrete Tight, Conduit Size 3-1/2 Inches, Length 3.906 Inches, Material Zinc Plated Steel, For use with EMT Conduit

TC129A

Set Screw Connector, Concrete Tight, Conduit Size 3-1/2 Inches, Length 3.906 Inches, Material Zinc Plated Steel, For use with EMT Conduit
EMT Connectors, Color-Coded, Steel, Red, Size 3/4"

231-SR

EMT Connectors, Color-Coded, Steel, Red, Size 3/4"
Connector, compression, steel. 105 Degree C insulated throat, size 1"

252-USI

Connector, compression, steel. 105 Degree C insulated throat, size 1"
EMT Connectors, Color-Coded, Steel, Green, Size 3/4"

231-SG

EMT Connectors, Color-Coded, Steel, Green, Size 3/4"
EMT Couplings, Color-Coded, Steel, Blue, Size 1"

242-SBLU

EMT Couplings, Color-Coded, Steel, Blue, Size 1"
EMT Connectors, Color-Coded, Steel, Blue, Size 1-1/4"

233-SBLU

EMT Connectors, Color-Coded, Steel, Blue, Size 1-1/4"
Mighty-Merge Transition Fittings. EMT to AC/MC Coupling

4157-DC

Mighty-Merge Transition Fittings. EMT to AC/MC Coupling

Frequently Asked Questions

Where is the connector manufactured?

The connector is manufactured in the USA.

What is the maximum operating temperature?

The connector has an insulated throat rated for a maximum temperature of 105°C.

What is the maximum operating temperature?

The connector has an insulated throat rated for a maximum temperature of 105°C.

Where is the connector manufactured?

The connector is manufactured in the USA.

What is the purpose of the connector?

The connector is used to join EMT to a box or enclosure.

What certifications does the connector have?

The connector meets Federal Specification A-A-50553, NEMA FB-1, and UL Standard UL-514B.

What materials are used in the connector?

The connector is made of steel with a zinc electro-plate finish.

What materials are used in the connector?

The connector is made of steel with a zinc electro-plate finish.

What is the purpose of the connector?

The connector is used to join EMT to a box or enclosure.

What certifications does the connector have?

The connector meets Federal Specification A-A-50553, NEMA FB-1, and UL Standard UL-514B.

Frequently Asked Questions about NSI Industries

How are Tork products typically installed?

Tork products are typically installed by trained technicians who follow a comprehensive commissioning process. This includes verifying the work environment, conducting electrical installation checks, performing internal and external equipment inspections, powering on the system, and executing operational tests to ensure compatibility and reliability.

What environmental ratings do Tork products have?

Tork products are designed to meet various environmental ratings, including NEMA Type 4X and Type 6, which provide protection against corrosion, windblown dust, rain, and occasional temporary submersion. These ratings ensure that Tork products can withstand harsh industrial environments while maintaining operational integrity.

What communication protocols do Tork products support?

Tork products support a comprehensive range of communication protocols, including PROFIBUS DP V1, PROFINET with dual port, EtherNet/IP with dual port, CANopen, and Modbus RTU integrated as standard. These protocols facilitate flexible network integration and high-performance communication across various industrial automation systems.

What are the key features of Tork products?

Tork products are designed with advanced features that enhance efficiency and reliability in industrial applications. Key features include integrated harmonics and EMC design for improved power quality, removable terminals for quick installation, and USB ports for easy troubleshooting. Additionally, Tork solutions emphasize user-friendly setup with application wizards and memory modules for convenient parameter management.

What are the main product lines offered by Tork?

Tork offers a diverse range of products primarily focused on industrial automation, including TORK® Photocontrols, lighting controls, and various electrical components such as enclosures, occupancy sensors, and grounding solutions. These products are designed to enhance efficiency and reliability in commercial and industrial applications.

What technical support does Tork offer?

Tork offers a comprehensive range of technical support services, including 24/7 customer support, on-site service management, and a technical hotline network. With three advanced technical support centers and over 8,000 hours of technical training conducted annually, Tork ensures certified expertise across 25+ languages to assist customers effectively. Their commitment to service is reflected in a 98% Service Level Agreement compliance rate, providing reliable support for all operational needs.

What industries and applications are Tork products used for?

Tork products are utilized across a variety of industries, including food processing, healthcare, hospitality, and manufacturing. They are designed for applications such as hand hygiene, surface cleaning, and dispensing solutions, ensuring efficiency and compliance in environments that require high standards of cleanliness and safety.

What certifications and standards do Tork products comply with?

Tork products comply with UL and cUL certifications, ensuring they meet rigorous safety and performance standards. Additionally, many models are designed to meet NEMA enclosure ratings, providing protection against environmental factors.

How are Remke products typically installed?

Remke products are typically installed through a systematic process that includes site audits to verify proper wiring, followed by remote or on-site commissioning. This commissioning involves installation verification, programming, and communication testing to ensure the system operates reliably and meets design specifications.

What accessories are available for Remke products?

Remke offers a wide range of accessories for their products, including panel mounting kits, fuse holders for voltage inputs, ferrites for communication modules, and current transformers. These accessories enhance the functionality and protection of Remke's industrial automation solutions, ensuring reliable performance in various applications.