NSi Industries 644 - Connector, Clamp Type, Two-Piece, Steel, Size K.O. 1-1/4 Inch
NSI Industries

644

UPC: 781747006448


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Overview

The NSI Industries 644 is a two-piece, clamp-type steel connector engineered for 1-1/4 inch knockout (K.O.) applications in NM appliance connections. Constructed from durable steel, this connector delivers a secure mechanical joint essential for maintaining electrical continuity and system integrity in industrial and commercial installations. The snap-in design enables rapid, tool-free installation, reducing labor time while ensuring a reliable fit. Its robust steel construction resists physical stress, corrosion, and environmental wear, providing long-term durability in demanding electrical raceways and enclosures. Compatible with standard 1-1/4 inch K.O. openings, the 644 supports efficient assembly in electrical systems where secure, code-compliant connections are required. As part of NSI Industries' trusted line of electrical components, this connector meets industry safety standards and is specified by electricians and contractors for dependable performance in both new construction and retrofit projects. The two-piece clamp design ensures a tight seal around conductors, preventing displacement and maintaining grounding continuity.
  • Two-piece clamp-type design for secure mechanical connections
  • Constructed from durable steel for long-term durability and corrosion resistance
  • Snap-in installation for rapid, tool-free assembly
  • Compatible with 1-1/4 inch knockout (K.O.) openings in NM appliances
  • Maintains electrical continuity and grounding integrity in industrial/commercial systems

Specifications

Application
Used to connect non-metallic cable to box or enclosure, locknut not required.
Cable Entry
Two piece steel clamp with tabs to insert through knockout
Connection Type
Clamp Type
Finish
Zinc Electroplated
Material
Steel
Size
1 1/4 in
Size
1-1/4 Inch K.O.
Special Features
Cable Range - .250-.980 in
Standard
UL
Trade Size
1.25 in
Type
Connectors
Package Weight (Imperial)
0.119 L
Package Weight (Metric)
0.054 kg

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Frequently Asked Questions

Is a locknut required for installation?

No, a locknut is not required for installation.

What material is the product made of?

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

What are the product certifications?

The product is certified under NEMA Standard FB-1 and UL Standard UL-514B.

What is the trade size of the connector?

The trade size of the connector is 1 1/4 inches.

Where is the product manufactured?

The product is manufactured in the USA.

Frequently Asked Questions about NSi Industries

What technical support does NSi Industries offer?

NSi Industries offers dedicated technical support through their toll-free technical support line at 888.500.4598. They are committed to customer satisfaction and promise to make every reasonable effort to remedy any product or service issues. Additionally, customers can contact their customer service team at 800.321.5847 or email [email protected] for further technical assistance.

What are the key features of NSi Industries products?

NSi Industries products feature exceptional versatility, reliability, and safety across multiple industrial automation categories. Key features include insulation piercing connectors with no wire stripping required, watertight and corrosion-free designs, wide wire range compatibility (from #14 AWG to 750 MCM), and the ability to install on energized conductors. Their product lines like Easy-Tap™ Connectors and TORK® Digital Timers demonstrate advanced capabilities such as turbo spacers, double shear-head bolts, astronomic scheduling, and enhanced switching technologies.

What environmental ratings do NSi Industries products have?

NSi Industries enclosures feature robust environmental ratings, including IEC 60529 IP66 certification, NEMA Type 1, 2, 3, 4, 4X, 12, and 13 ratings, and UL/CSA standards. Their products are designed for both indoor and outdoor applications, with protection against dust, water, corrosion, and extreme temperatures ranging from -40°F to 266°F.

How are NSi Industries products typically installed?

NSi Industries products are typically installed using detailed mechanical and digital wiring diagrams that specify precise connection methods for various voltage configurations (120V, 208V, 240V, 277V, 480V). Installation involves carefully following product-specific wiring schematics, which include clear terminal block connections, ground wire specifications, and phase alignment requirements. Professional electricians and technicians should reference the specific product's wiring diagram to ensure correct installation and electrical compliance.

What industries and applications are NSi Industries products used for?

NSi Industries provides electrical and automation products for diverse industrial applications, including lighting control, electrical enclosures, wire management, connectors, and sensor technologies. Their product lines serve commercial, industrial, and infrastructure markets with solutions for electrical infrastructure, control systems, and safety-critical environments.

What are the main product lines offered by NSi Industries?

NSi Industries offers a comprehensive range of industrial products including TORK® Photocontrols, Polaris™ Lighting Controls, Easy-Twist™ Grounding Solutions, Miniterms, Cable Ties, Connectors, Enclosures, Occupancy Sensors, and Wire Management systems. Their product lines span electrical components, control devices, and industrial automation accessories designed for diverse applications in commercial and industrial settings.

What accessories are available for NSi Industries products?

NSi Industries offers a range of accessories for their product lines, including photocontrol accessories like replacement caps, mounting brackets, and receptacles. Specific accessories include shorting caps, open caps, 3-pin and 7-pin receptacles, and utility mounting brackets for conduit photocontrols. For specialized applications, NSi recommends contacting their customer service team to discuss custom accessory needs.