NSI Industries TWB-51 - Bushing, Insulating, Polyethylene, Trade Size 1/2 Inch
NSI Industries

TWB-51

UPC: 781747400512


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Minimum Qty: 100

Multiplier: 100

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Overview

NSI Industries TWB-51 Polyethylene Insulating Bushing (SKU: TWB-51) provides critical electrical installation protection for trade size 1/2 inch conduit systems. Engineered with high-quality polyethylene material, this insulating bushing meets NEC paragraph 373-6C requirements by offering smoothly rounded insulating surfaces at raceway entrances. The blue insulating liner in the throat reduces wire pulling effort by up to 50% compared to uninsulated fittings. Temperature rated to 105°C, the TWB-51 ensures safe cable routing while preventing conductor damage during installation and long-term use. Designed for steel or malleable iron conduit (steel through 1.5 inches), this bushing features a locknut-type base for improved bonding and vibration resistance. The high ribs allow for finger or wrench tightening, while the broad flange covers knockout holes completely. Ideal for commercial, industrial, and infrastructure electrical applications requiring compliant cable protection and efficient installation workflows.
  • Polyethylene insulating bushing for 1/2 inch conduit (trade size)
  • Meets NEC paragraph 373-6C requirements for ungrounded conductor protection
  • Blue insulating liner reduces wire pulling effort by up to 50%
  • Temperature rated to 105°C for reliable performance in demanding environments
  • Locknut-type base improves bonding and resists loosening under vibration

Specifications

Application
Bushing insulates nonmetallic low voltage cabling (telephone, computer, video, data cables) sharp edges in EMT.
Bushing Type
Insulating
Color
White
Finish
No Finish
Material
Plastic
Size
1/2 IN
Special Features
May be used for single or multiple voice, video, or data cables. Complies with NEC Article 300-15(c).
Temperature Rating
90?°C
Trade Size
0.5 in
Type
Bushing
Package Weight (Imperial)
0.003 L
Package Weight (Metric)
0.001 kg

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Frequently Asked Questions

What is the trade size of the TWB-51 bushing?

The trade size of the TWB-51 bushing is 1/2 inch.

What codes does the TWB-51 bushing comply with?

The TWB-51 bushing complies with NEC Article 300-15(c).

What is the material of the TWB-51 bushing?

The TWB-51 bushing is made of plastic, specifically polyethylene.

How many TWB-51 bushings are in a standard package?

A standard package contains 1000 TWB-51 bushings.

What are the dimensions of the TWB-51 bushing?

The dimensions are: A: .558 inches, B: .835 inches, C: .537 inches.

What applications is the TWB-51 bushing suitable for?

The TWB-51 bushing is suitable for insulating telephone, computer, video, and other low voltage wiring.

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.