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NSI Industries N-350 - Copper Split Bolt Connector 350 MCM Copper Split Bolt Connectors are high-strength solderless service connectors made of high-copper alloy for copper and copperweld wires. Type for two maximum wire sizes.
NSI Industries

N-350

UPC: 662381020109

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Overview

The NSI Industries N-350 Copper Split Bolt Connector is a high-strength, solderless service connector engineered for reliable electrical connections in copper and copperweld wire applications. Made from high-copper alloy, this connector delivers superior corrosion resistance and mechanical strength, ensuring long-term performance in demanding environments. The N-350 accommodates wire sizes from 4/0 AWG (0.258 in.) to 350 MCM (0.682 in.), making it ideal for heavy-duty industrial, utility, and commercial installations. Key specifications include UL486A listing for wire connections and UL486D listing for direct burial applications, with a recommended torque of 650 inch-pounds for optimal electrical and mechanical integrity. The connector features a durable design with a nut hex for proper torquing using standard tools, and a pressure bar that ensures secure wire retention across the full range of supported conductor combinations. Applications include power distribution, grounding systems, and service connections where high-current carrying capacity and durability are critical. The N-350 is part of NSI Industries' trusted line of split bolt connectors, known for their wide wire range-taking capability, which minimizes inventory requirements and simplifies procurement. For use in environments requiring UL-certified components up to 600V and 90°C temperature rating, the N-350 provides a dependable solution for professionals who demand performance and compliance.
  • UL486A listed for copper/copperweld wire connections
  • UL486D listed for direct burial applications
  • Accommodates 4/0 AWG to 350 MCM wire sizes
  • Recommended torque: 650 inch-pounds
  • High-copper alloy construction for corrosion resistance
  • Pressure bar ensures secure wire retention
  • Compatible with standard socket/box/open-end wrenches
  • Temperature rated up to 90°C, 600V applications

Specifications

Application
Wire Termination
Color
Copper
Connection Type
Solderless
Environmental Conditions
90 C
Finish
Copper
Housing Material
Copper
Material
High-copper alloy
Material
Copper
Number Of Conductors
2
Number Of Poles
1
Size
L=2.440 - W=1.220 IN
Size
350 MCM
Special Features
4/0 STR-350 MCM - 4 Pack
Standard
UL486B
Temperature Rating
90 C
Temperature Rating, Maximum
194 F
Temperature Rating, Maximum
90 C
Temperature Rating, Minimum
194 F
Temperature Rating, Minimum
90 C
Type
Copper Split Bolts
Voltage Rating
600 V
Warranty
1 Year
Wire Size
4/0 STR - 350 MCM
Wire Type
Class A & B
Package Dimensions (L x W x H)
1.181 IN x 1.22 IN x 2.362 IN
Package Dimensions (L x W x H)
2.9997 cm x 3.0988 cm x 5.9995 cm
Package Weight (Imperial)
0.830 L
Package Weight (Metric)
0.376 kg
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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.

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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.

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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.

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