NSI Industries 391 - Bushing, Insulated, Grounding, Malleable Iron, Size 5 Inch
NSI Industries

391

UPC: 781747003911


Documents & Media
Specification SheetVideo ClipWarranty

Contact for Pricing

Overview

The NSi Industries 391 is a 5-inch insulated grounding bushing constructed from durable malleable iron, designed for reliable electrical grounding in industrial applications. This bushing meets National Electric Code (NEC) requirements under paragraph 373-6C, which mandates protection of ungrounded conductors with smoothly rounded insulating surfaces at raceway entrances, pull boxes, and junction boxes. Key features include a nylon insulated metallic throat with a distinctive blue insulating liner, reducing wire pulling effort by up to 50%. The smooth, rounded shoulder covers the conduit end, while the broad flange covers the knockout hole for secure installation. High ribs on the bushing facilitate easy tightening with fingers or a wrench, and the locknut-type base enhances bonding while resisting loosening from vibration. Manufactured in the US, this bushing is rated for 105°C operation and is ideal for ensuring electrical safety and preventing faults in industrial electrical installations. The malleable iron construction provides excellent wear resistance and corrosion resistance, extending equipment lifespan in demanding environments.
  • 5-inch size for large raceway applications
  • Malleable iron construction for durability and corrosion resistance
  • Nylon insulated metallic throat with blue insulating liner (NEC 373-6C compliant)
  • Reduces wire pulling effort by up to 50%
  • Locknut-type base resists loosening from vibration
  • 105°C temperature rating for demanding environments
  • Smooth rounded shoulder and broad flange for secure installation
  • High ribs for easy tightening with fingers or wrench

Specifications

Application
Used with locknut to terminate service conduit to cabinet. Lug provided for bonding jumper to neutral busbar. Grounding lug: aluminum allog 6061-T6. Plastic metaliner prevents damage to wire insulation. 1/2" thru 4" rated 150 degree C, 5" and 6" rated 105 degree C.
Color
Grey with Black Insulator
Finish
Zinc Electroplated
Material
Malleable Iron
Size
5 in
Special Features
Grounding Lug Wire Capacity #6 - #250 MCM
Standard
cULus
Temperature Rating
150?°C
Trade Size
5 in
Type
Bushing
Package Weight (Imperial)
1.480 L
Package Weight (Metric)
0.671 kg
Bushing, Insulated, Grounding, Malleable Iron, Size 1 Inch

383

Bushing, Insulated, Grounding, Malleable Iron, Size 1 Inch

Frequently Asked Questions

What is the standard package quantity for Product 391?

The standard package quantity for Product 391 is 5 units.

What is the trade size of Product 391?

The trade size of Product 391 is 5 inches.

What certifications does Product 391 hold?

Product 391 meets Federal Specification Number A-A-50553, NEMA Standard FB-1, and UL Standard UL-514B. Its UL File Number is E20412.

What is the temperature rating for the 5-inch bushing?

The 5-inch bushing (Product 391) is rated for 105 degrees C.

What is the finish of Product 391?

The main body of Product 391 has a zinc electro-plate finish. The grounding lug has a tin electro-plate finish.

What materials are used in Product 391?

Product 391 is made from Malleable Iron. The grounding lug is made from aluminum alloy 6061-T6.

What are the dimensions of Product 391?

Product 391 has dimensions of A: 6-1/8 inches, B: 1-1/8 inches, and C: 4-13/16 inches.

What is Product 391 used for?

Product 391 is an insulated grounding bushing used with a locknut to terminate service conduit to a cabinet. It provides a lug for a bonding jumper to the neutral busbar.

What are the dimensions of Product 391?

Product 391 has dimensions of A: 6-1/8 inches, B: 1-1/8 inches, and C: 4-13/16 inches.

What is the standard package quantity for Product 391?

The standard package quantity for Product 391 is 5 units.

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.