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NSI Industries 257-SRTI - Connector, Compression, Steel, Insulated Throat - 105 Degree C, size 3"

NSI Industries 257-SRTI Connector, Compression, Steel, Insulated Throat - 105 Degree C, size 3"

UPC: 781747122575


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Overview

The NSI Industries 257-SRTI is a UL486A Listed steel compression connector engineered specifically for flexible and extra-flexible copper cables in demanding industrial applications. This 3-inch connector features an insulated throat rated for 90°C and 600V, ensuring enhanced safety and durability in high-temperature electrical installations. Designed to meet the rigorous demands of locomotive, welding, and mining cables, the 257-SRTI includes flared openings at both ends to simplify cable insertion and a positive center stop for proper alignment during installation. The tin-plated finish provides superior corrosion resistance, making it suitable for use in damp or wet locations where moisture exposure is a concern. UL486A Listed and cULus Listed (155027), this connector meets stringent safety standards for reliable performance in harsh environments. It is ideal for copper cables ranging from 1 AWG to 3/0 AWG, delivering robust, long-lasting connections in critical electrical systems. The connector's construction ensures a secure and stable connection, reducing the risk of electrical faults in high-vibration or high-stress applications.
  • UL486A and cULus Listed (155027) for safety compliance
  • Insulated throat rated for 90°C and 600V
  • Flared openings for easy cable insertion and alignment
  • Tin-plated steel construction for corrosion resistance
  • Compatible with 1 AWG to 3/0 AWG copper cables

Specifications

Application
Used to join EMT to box or enclosure. Concrete/Raintight. Insulated Throat - 105°C. Patented
Connection Type
Compression
Connector Type
Steel Raintight/Concrete-Tight Insulated
Finish
Zinc Electroplated
Insulation
Insulated Throat
Ip Rating
IP66/IP67
Material
Steel
Material Quality
Steel
Size
3 IN
Special Features
Connectors assembled with knockout gasket, no separate pieces to buy and stock
Standard
cULus
Temperature Rating, Maximum
221 F
Temperature Rating, Maximum
105 C
Temperature Rating, Minimum
221 F
Temperature Rating, Minimum
105 C
Trade Size
3 in.
Type
Connector
Voltage Rating
600 V
Package Weight (Imperial)
2.166 L
Package Weight (Metric)
0.982 kg
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Frequently Asked Questions

What is the trade size of the connector?

The trade size of the connector is 3 inches.

What is the catalog ID for this product?

The catalog ID for this product is 257-SRTI.

What material is the connector made from?

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

Is the connector suitable for outdoor use?

Yes, the connector is concrete/raintight, making it suitable for outdoor use.

How is the connector used?

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

What is the maximum temperature rating?

The insulated throat has a maximum temperature rating of 105°C.

What certifications does the connector have?

The connector meets Federal Specification Number A-A-50553 and NEMA Standard FB-1.

What is the UPC number for the connector?

The UPC number for the connector is 78174712257.

What is the standard package quantity?

The standard package quantity is 10 connectors.

What is the UL file number for this product?

The UL file number for this product is E24001.

Frequently Asked Questions about NSI Industries

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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.

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